JP2019062885A - Method for natural enemy settlement and method for insect pest control - Google Patents

Abstract

To maintain natural enemies of population effective for insect pest control in a farm field for plants with dwarf stems for a long period and to provide a method for insect pest control using the natural enemies.SOLUTION: A method for natural enemy settlement in a farm field is provided, the method including: a step of releasing natural enemies, in a free-range manner, such as Haplothrips brevitubus (Karny), Orius strigicollis (Poppius), and Amblyseius swirskii (Athias-Henriot) in a field for plants with dwarf stems; and a step of dispersing eggs of Artemia in the farm field.SELECTED DRAWING: None

Description

The present invention is a plant having a stem that has reduced natural enemies such as the red- handed thrips ( Haplothrips brevitubus (Karny)), the yellow-spotted stink bug ( Orius strigicollis (Poppius)), and the Swarsky phytoseiid ( Amblyseius swirskii (Athias-Henriot)). It relates to the method of fixing natural enemies to be fixed in the field. Furthermore, the present invention relates to a pest control method using natural enemies.

  In the field of strawberries, the damage caused by acarid pests, lepidopteran pests and thrips pests is a problem, and in particular, the feeding damage of thrips pests is remarkable, and it is effective in cheaply cultivating good quality strawberries. Establishment of a method is desired. The thrips pest is fast-growing and small in length, so when it notices its occurrence, a large number of thrips pests are already infested in many cases, and it is possible to deviate from using chemical pesticides. In addition, some thrips pests tend to move into the soil when they hatch, and because they are not directly exposed to chemical pesticides, their effects may be difficult to exert. In addition, repeated application of chemical pesticides to pests that do not know when they will enter the field is not only inefficient, but may also promote the development of resistant pests of chemical pesticides. Therefore, in recent years, pest control by natural enemies that can be used at various growth stages of strawberries is required.

The red-tailed thrips, a type of predatory thrips, is intended to prey on eggs and larvae such as thrips, stinks, flies, ticks and moths, and is particularly useful as a natural enemy of the thrips pest Are known. Eggs of the butterfly order Ephestia kuehniella (Zeller) are used as bait for mass rearing of the stag- tailed thrips, but when used for propagation in the field eggs of the stag-tailed mackerel Since it is expensive and its supply is unstable, it is required to secure an alternative bait that can be supplied inexpensively and stably.

  The stink bug is a predatory stink bug that belongs to the stink bug family, and it is known that it feeds predatory spider mites, aphids and eggs and young larvae, mainly on thrips. The large-scale rearing of Tyllid beetles uses eggs of Scutellaria barbata D. Dona like the red-handed thrips, but the problem is that it is expensive to use for propagation in the field.

  The Swarsky Phytoseiidae is a predatory mite belonging to the Acarid Phytoseididae, and feeds on a wide range of pests such as thrips, whitefly and red spider mite. It is also known that pollen can be grown on feed even in the absence of pests.

Non-Patent Document 1 describes differences in the feeding method of feed in rearing the red-tailed thrips. During the larval stage of this thrips, it is fed as eggs of Scutellaria barracuda moth, eggs of Artemia (brine shrimp, Artemia spp.), Or juveniles and imagos of the thrips thrips, and in the adult stage, it is fed It is described that when fed and matured, the difference in the feed given to the larval stage did not cause a significant difference in the number of eggs laid on the red-tailed thrips. On the other hand, in the case of feeding the eggs of S. japonicus as food at the larval stage and the eggs of S. japonicus, Artemia's eggs, or juveniles of the black-tailed thrips at the adult stage, it is matured. The number of eggs produced by Scutellaria japonicum is most often given when eggs of Scutellaria barbata D. Don are at adulthood, and it has been described that an adult diet is important for its maturation. However, no method has been described for establishing P. niger on the field.

  In Non-Patent Document 2, for the purpose of promoting the establishment and growth maintenance and promotion of predatory natural enemies, it is possible to replace inexpensive predatory natural enemy eggs with the eggs of S. japonica and to use inexpensive Artemia permanent eggs (brine shrimp The results are described using the In rearing the predatory natural enemy, Pleurocybium hilarus, there was no significant difference in the number of oviposits and the number of days of larval development between using the Artemia permanent eggs and using the E. gondii eggs, but It has been described that in the breeding of skiff mites, Artemia durable eggs were not effective as bait. However, no description has been made with regard to Rana pipiens thunus.

  Patent Document 1 describes a method of fixing a predatory phytoseiid mite to seedlings in growing seedlings and controlling pests such as red mite, thrips and whitefly, and as a fixing method, a method of rehydration, bait insect and the like Although it has been described that food other than insects such as eggs and pollen is replenished into the nursery environment, there is no description about the type and required amount of insects and pollen as alternative food.

Kenji Fujimoto, 3 others, "Long-term preservation and mass production of the predatory natural enemy Akamega shiwada thrips from Maizuru", [online], Kyoto Prefectural University, [May 11, 2017 search] Internet <URL: http: / /www2.kpu.ac.jp/life_environ/app_entom/ACTR%202012.pdf> Miura Ikei, Plant Protection, Vol. 71, No. 8, pp. 543 to 546

JP 2018-102173 A

  After the thrips pest invades the field, it is preyed by natural enemies (hereinafter, also simply referred to as the natural enemies of the present invention) such as black-tailed thrips, thrips thrips, swarski phytophagids, and this thrips pest If the number of individuals can be suppressed, it is thought that subsequent outbreaks can be avoided. Therefore, if it is possible to maintain the natural enemy population of the present invention in a field where the number of feed pests is reduced, efficient pest control becomes possible. However, the natural enemies of the present invention, in particular, the red-handed thrips, are highly mobile natural enemies, and die or other places where there are large environmental changes such as a shortage of feeding pests or temperature deviations from suitable temperatures. It is difficult to maintain the population of the red-tailed thrips at a certain place for a long period of time because it moves to It is effective as a control method for pests including thrips pests, by repeatedly releasing the stag-nosed thrips and keeping its population, but it is frequently used against a pest that does not know when to invade. It is not practical to maintain the pest control effect, since releasing Kazamuhana is costly and time-consuming.

  Plants that have shortened stems, for example, strawberries, can be cultivated year-round by temperature control, but usually they plant seedlings and, depending on the growth of the strawberries, perform runner picking, defoliation, flower thinning, and thinning while performing runner picking. Harvest the fruit. Strawberry berries can be pollinated by insects or artificially when the strawberries are flowered and harvested three to four weeks later. If the strawberry is to be harvested in spring over winter, it becomes warm again, and if the strawberry starts to grow, the strawberry fruits are harvested while performing runner picking, defoliation, flower thinning and plucking. When controlling pests by using the predatory natural enemy thrips, the red-tailed thrips, which is cultivated throughout the year as described above, to control pests, the temperature is low, and the seasons of strawberries are used throughout the season with few feeding organisms and pollen. It was a challenge to maintain the population of thrips more than a certain level.

  The present invention provides a method of propagating and developing a natural enemy of the present invention in a field of a plant having a shortened stem for a long period of time, in order to improve the establishment rate of the plant having the natural enemy shortened stem of the present invention in the field. The purpose is Another object of the present invention is to provide a pest control method using the method for fixing the natural enemy of the present invention in the field of a plant having a shortened stem.

  The present inventors diligently studied in order to solve the above-mentioned problems, in combination with releasing the plant having a natural enemy shortening stem of the present invention to the field, and spraying Artemia eggs to the field, in the field, It has been found that the number of natural enemies of the present invention which die or move out of the field decreases. The above problems are solved by the present invention described below.

(1) A method of fixing a natural enemy to the field, including the steps of releasing the natural enemy in the field of a plant having a shortened stem, and dispersing the eggs of Artemia on the field.
(2) The colonization method according to (1), wherein the natural enemy is at least one member selected from the group consisting of red-handed thrips, black-and-white stink bug and swalski phytophagid mites.
(3) The method for fixing according to (1) or (2), wherein the natural enemy is a red-tailed thrips.
(4) The establishment method according to (1) to (3), wherein the plant having a shortened stem is a plant having a shortened stem on the ground.
(5) The fixing method according to (4), wherein the plant having a shortened stem in the ground part is a strawberry.
(6) The fixing method according to (4) or (5) above, characterized in that eggs of Artemia are scattered on the shortened stems of the ground part.
(7) The fixing method according to any one of (4) to (6), wherein the shortened stem of the ground part is a crown of a strawberry.
(8) The fixing method according to any one of (1) to (7), wherein the Artemia egg is a dried and durable egg.
(9) A pest control method including the step of releasing natural enemies in the field of a plant having a shortened stem, and the step of applying Artemia eggs to the field.
(10) The method for controlling pests according to (9), wherein the natural enemy is at least one selected from the group consisting of red-handed thrips, black-and-white stink bug and swalski phytophagid mites.
(11) The method for controlling pests according to (9) or (10), wherein the natural enemy is Red-legged thrips.
(12) The pest control method according to the above (9) to (11), wherein the plant having a shortened stem is a plant having a shortened stem on the ground.
(13) The pest control method according to any one of (9) to (12), wherein the plant having a shortened stalk in the ground part is a strawberry.
(14) The pest control method according to any one of the above (9) to (13), characterized in that eggs of Artemia are scattered on the shortened stems of the ground part.
(15) The pest control method according to any one of (9) to (14) above, wherein the shortened stem of the ground part is a crown of a strawberry.
(16) The pest control method according to any one of (9) to (15) above, wherein the Artemia egg is a dry and durable egg.

  It is possible to control insect pests by fixing natural enemies such as the population number of this species effective for pest control, such as the dry cuttlefish stink bug, and the Swarsky phytophagid mites, in the field of a plant having a shortened stem. It is possible to suppress the growth of pests in the field and to suppress the spread of damage such as feeding damage by pests.

  Hereinafter, the present invention will be described in detail by citing preferred embodiments.

  The present invention relates to releasing the natural enemy of the present invention in the field of a plant having a shortened stem and spreading the eggs of Artemia in the field. The present invention also relates to a method for controlling pests, which comprises the steps of releasing the natural enemy of the present invention into a field of a plant having a shortened stem, and spraying an Artemia egg onto the field.

  In the present invention, “establishment” refers to repeated breeding and development in the field of a plant having a shortened stem released from which the natural enemy of the present invention was released, and the number of individuals in the field is not zero, and at least the natural enemy of the present invention. It means that the existence is maintained. That is, the number of natural enemies staying in the field of a plant having a released short stem means a state in which at least the presence of adults performing reproductive behavior or larvae completing development is maintained. A "shortened stem" refers to a stem that is extremely shrunk between nodes, resulting in multiple leaves.

  The method of fixing the natural enemy of the present invention to the field of the present invention including the steps of releasing the natural enemy of the present invention into the field of a plant having a shortened stem, and spraying eggs of Artemia to the field is described below. .

  Plants having a shortened stem are, for example, vegetables such as sweet corn, carrots, Japanese radish, spinach, strawberries, parsley, honeybees, green onions, wasabi, or sugar beet, or cyclamen, saintpaulia, gerbera, freesia, tulips, narcissus, hyacinth And crocuses, etc., preferably a plant having a shortened stalk in the ground part such as carrot, Japanese radish, spinach, strawberry, parsley, cyclamen, St. poria, or gerbera, and particularly preferably a thrips pest It is a strawberry that occurs frequently and often uses the natural enemy of the present invention.

  In the step of releasing the natural enemy of the present invention in the field of a plant having a shortened stem, the developmental stage of the natural enemy of the present invention may be, for example, the developmental stage of eggs, larvae, pupae, adults, and move in the field. Adults are preferred because they are likely to be fixed uniformly.

  Field of plant having a short stem for releasing natural enemies of the present invention includes, for example, alley or facility, plateau nursery, nursery facility, rain shelter, tunnel house, vinyl house, glass house, plant factory, etc. Can be mentioned. In order to avoid the movement of the natural enemy of the present invention out of the field, it is preferable that it is a certain closed space such as a vinyl house or a glass house.

  The place where the natural enemy of the present invention is released is not particularly limited as long as it is a place where pests can be controlled in the field of a plant having a shortened stem, for example, flowers, young fruits, ripe fruits, leaves of a plant having a shortened stem Stems, plant roots, rhizomes, or shortened stems (hereinafter also referred to as a surface of a plant having shortened stems), or a bud between plants of two or more shortened stems. It is preferable that the natural enemy of the present invention be released on a shortened stem of a plant having a shortened stem, particularly a shortened stem on the ground, because it is easy to lay eggs and establish itself on the spot. If it is a field of strawberries, it is preferable to release them at the origin of the strawberries, especially at the crown of the strawberries.

  The method of releasing the natural enemy of the present invention is, for example, releasing the surface of a plant having a shortened stem using a container containing a fixed number of the natural enemies of the present invention, or the paper bundle described in WO2013 / 157640. And the like are placed in the field of a field of a plant having a shortened stem, and transferred to the surface of the plant having a shortened stem. As a method of releasing the container using the container containing the constant number of the present invention of the present invention described above, a method of installing the container in the field of a plant having a shortened stem, and And the like. Moreover, as a method of releasing using the paper bundle described in the above-mentioned WO 2013/157640, it is a shelter used when rearing or transporting natural enemies, which is a sheet-like composition containing cellulose fibers. A method of bundling a bundle of papers such as kitchen paper as a specific example, and placing natural enemies of the present invention between the papers in a field of a plant having a shortened stem, from the paper bundle of the present invention There is a method to sprinkle natural enemies on strawberries.

  The number of natural enemies of the present invention to be released is 1 to 100 per plant with a short stem, and 2 to 60 per plant with a short stem, from the stability of establishment, in the case of the red-handed thrips Is preferred. In the case of Pleurocybium hiatus, it is preferably 1 to 50 plants per plant having a shortened stem, and from 1 to 20 plants per plant having a shortened stem, from the viewpoint of stability of establishment. In the case of Swarsky phytophagid mites, it is preferable that the number is 1 to 250 per plant having a shortened stem, and from 2 to 100 per plant having a shortened stem from the stability of establishment.

In the step of applying Artemia eggs to the field of a plant having a shortened stem, Artemia species include, for example, Artemia franciscana , Artemia monica , Artemia persimilis , Artemia salina , Artemia sinica , Artemia tibetiana , Artemia urmiana .

  As a form of Artemia egg, although a shell-mounted dry durable egg and a shell-free egg can be obtained, a shell-mounted dry durable egg is preferable because it tends to be a food for the natural enemy of the present invention. As a dried durable egg with Artemia shell, for example, a trade name "Tetra brine shrimp eggs" available from Spectrum Brands Japan Ltd. can be used. Although Artemia is generally used as a bait for tropical fish after hatching in water, it may be used in the state of an unhatched egg in the present invention, and when used in the state of an egg, it may be used for a long time The occurrence of mold can be avoided.

  The place to which Artemia eggs are sprayed is not particularly limited as long as it is a field of a plant having a shortened stem, for example, flowers, young fruits, ripe fruits, leaves, stems, plant roots, rhizomes, plants with shortened stems. Or a short stem etc. or a bud between plants of a plant having two or more short stems. The eggs of Artemia are preferably applied to the short stems of plants having short stems, in particular to the short stems of the ground, and in the case of strawberry fields, it is preferred to be applied to the origin of strawberries, in particular to the crowns of strawberries. . A shortened stem of a plant having a shortened stem is also capable of maintaining a thrips thrips around a strawberry strain infested with pests, and also for cultivating and harvesting a plant having a shortened stem so that the quality of the plant is good. If it is a field of strawberries, it is preferable to spray on the origin of the strawberries, especially on the crown of the strawberries.

  As a method of applying Artemia eggs, for example, a method of applying widely to a field of a plant having a shortened stem with a powder spreader, a method of adding it into small portions and applying it to each strain, and the like can be mentioned. In order to cultivate and harvest plants with shortened stems in good quality, or to reduce and effectively utilize the spread of eggs of Artemia, it is preferable to divide in small portions and sprinkle one by one.

  Artemia eggs may be sprayed more than once in the field of plants with shortened stems, and if spread more than once, the interval may be before the red haired thrips move from the field of plants with shortened stems, for example, It is once every 1 to 150 days, preferably once every 5 to 30 days, particularly preferably once every 7 to 20 days. By spraying the Artemia eggs more than once, it is possible to establish or promote establishment in the field of a plant having a shortened stalk, even in the case of Rana pipiens thunus, which has a high migration capacity.

  The time to spray Artemia eggs is, for example, immediately after planting a plant having a shortened stem into the field, before, at the same time as, after, or after releasing the natural enemy of the present invention. Etc. In the case of strawberries, for example, at the same time when performing defoliation, runner picking, planting new shoots in pots, picking, flower thinning, picking, harvesting, additional fertilization, etc. Good. By spreading them at these times, the load on workers is reduced, and it is possible to spread Artemia eggs efficiently.

  The order of the step of releasing the natural enemy of the present invention and the step of spraying the eggs of Artemia is not particularly limited, but the eggs of Artemia may be sprayed before the step of releasing the natural enemy of the present invention. The step of releasing the natural enemy and the step of dispersing the Artemia eggs may be simultaneous, or the Artemia eggs may be dispersed after the step of releasing the natural enemies of the present invention. In the present invention, “simultaneous” also includes the case where each process has a time difference of about 24 hours.

  The amount of Artemia eggs to be sprayed is, for example, 1 to 10000 mg, preferably 5 to 200 mg, more preferably 5 to 50 mg per time per one plant having a shortened stem.

  According to the fixing method of the present invention, it is possible to fix the natural enemies of the present invention having a population effective for pest control in the field of a plant having a shortened stem for 3 months or more.

  The method of the present invention of the present invention can be used to control thrips pests, for example, it can be used to control thrips pests in the field of plants having shortened stems .

  As described above, by establishing the natural enemy of the present invention in the field of a plant having a shortened stem, it is possible to control pests parasitic on the plant having a shortened stem.

  The time for releasing the natural enemy of the present invention may be, for example, before, simultaneously with, or after planting a plant having a shortened stem into a field.

  The pest control method is, for example, planting a plant having a shortened stalk in a field in the case of Red-legged thrips, simultaneously with or after that, 1 to 10000 mg of Artemia eggs per strain, using a powder spreader or a cylindrical container Spray on the surface of the plant with shortened stems, and place a lidless container containing 1 to 100 redhead crayfish thrips or a bundle of paper described in WO 2013/157640 in the origin of the plant or in the field. Then, 1 to 150 days thereafter, 1 to 10000 mg of Artemia eggs per plant having a shortened stem may be sprayed using a powder spreader or a cylindrical container. In addition, for example, a plant having a shortened stem is planted in a field, and 1 to 100 red stunted thrips are released from the bundle of paper described in WO 2013/157640 for each strain, and the stem is released simultaneously or later. How to sprinkle 1 to 10000 mg of Artemia eggs per strain to the strain origin of the plant having the same, and then 1 to 10000 mg of Artemia per strain on the surface of the plant having a shortened stem once every 1 to 150 days And eggs are dispersed using a powder spreader or a cylindrical container.

The pest control method is, for example, planting a plant having a shortened stem in a field, and at the same time or after that, 1 to 10000 mg of Artemia eggs per strain, a powder spreader or a cylindrical container. Use it and spray on the surface of plants with shortened stems, and sprinkle 1 to 50 Tyrich's beetles directly on or in a container without a lid at the bottom of the stock or field, then place in a container without lid, then 1 to 150 The method of spraying 1 to 10000 mg of Artemia eggs per plant having a shortened stem once a day using a powder spreader or a cylindrical container can be mentioned. In addition, for example, plant a plant with a shortened stem in a field, and sprinkle 1 to 50 Tyrichidae beetles directly on or in the container with no lid and release them into the plant stock of each strain or the pot of the field, At the same time or after release, 1 to 10000 mg of Artemia eggs are sprinkled per strain on the origin of the plant having a shortened stem, and thereafter once every 1 to 150 days, the surface of the plant having a shortened stem There is a method of spraying 1 to 10000 mg of Artemia eggs per strain using a powder spreader or a cylindrical container.

  The pest control method is, for example, in the case of swalski phytophagid, planting a plant having a shortened stem in a field, simultaneously with or after that, using 1 to 10000 mg of Artemia eggs per strain, using a powder spreader or a cylindrical container Spray on the surface of plants with shortened stems and sprinkle 1 to 250 swalski phytophagids directly onto the roots of the plant or field, or place them in a pack filled with bran and bait, Then, a method of spraying 1 to 10000 mg of Artemia eggs per plant having a shortened stem once every 1 to 150 days using a powder spreader or a cylindrical container may be mentioned. In addition, for example, plant a plant with shortened stems in the field, and sprinkle 1 to 250 swaurskii phytoseiids directly on the root of each strain or field, or put in a pack filled with bran and bait mites Release it and release it simultaneously or after that, sprinkle 1 to 10000 mg of Artemia eggs per strain on the strain origin of the plant with a shortened stem, and then further save the reduced stem once every 1 to 150 days There is a method of spraying 1 to 10000 mg of Artemia eggs per strain on the surface of the plant having the powder using a powder spreader or a cylindrical container.

  The pest control method according to the present invention may be carried out together with other natural enemies and pesticides, or may be used in combination with insecticidal plants.

  Hereinafter, the present invention will be more specifically described using examples. The present invention is not to be limited in any way by the following examples.

Example 1
About 12 mg of Artemia eggs (Spectrum Brands Japan Co., Ltd., trade name "Tetra brine shrimp eggs") were sprinkled and sprinkled on each origin of 10 strawberry seedlings that flowered in a plastic house. . After the first spraying, approximately the same amount of Artemia eggs was sprinkled on the crown of the strawberries repeatedly about once every two weeks. Immediately after the initial application of Artemia eggs, a total of 500 adults of 50 aphids thrips, which are used in "Akame" (registered trademark, Ishihara Sangyo Co., Ltd.), were released in the field of strawberries. Eighty days after release, the number of the red-handed thrips thrips per strawberry seedling was counted and the measurement results are shown in Table 1. In addition, the number of thrips pests which infested strawberry seedlings after 80 days of free feeding was counted for each strain, and the number (average value) per strawberry seedling is shown in Table 2.

(Comparative example 1)
The number of the stag-tailed thrips was measured in the same manner as in Example 1 except that the brine shrimp eggs were not sprayed, and the measurement results are shown in Table 1. In addition, Table 2 shows the number of thistle beetle pests per one strawberry seedling (average value).

  In Example 1, it was possible to confirm that the released Rana pipiens occidentalis oviposited, and that its eggs hatched and developed. In addition, after about 3 weeks after release, the larvae developed into cocoons and adults, and the number of individuals of the red-tailed thrips could be maintained at twice or more that of the comparative example. Furthermore, compared with Comparative Example 1, it could be confirmed that there were less pest of thistle beetle.

(Example 2)
In a strawberry cultivation field in winter, 15,000 A. mexicanum thrips were released per 10 ares, and at the same time, 15 mg of Artemia eggs were sprayed to the origin of each strain. During the test period, the eggs of Artemia were sprayed twice a week to the origin of the strain. The number of adults and larvae per strain of the red-tailed thrips three-day and 52-day after release is shown in Table 3.

  It has become clear that, even in a strawberry cultivation field in winter, it is possible to grow red-tailed thrips, by spraying Artemia eggs.

(Example 3)
In the same field as described in Example 2 above, in order to examine the effect on the pests of strawberries, one P. thunbergii thrips was inoculated per 1 strawberry after 75 days after releasing them. The number of adults and larvae per strain of the Hydrangea thrips 100 days after release was shown in Table 4.

  The number of the flowering thrips of the flowering thrips of the flower in the area sprayed with Artemia eggs was obviously less than that in the area not sprayed.

(Example 4)
Strawberry seedlings were fixedly planted in a pot, and 10 red lizard thistles were released per strain, and at the same time, 5 mg or 10 mg of Artemia eggs were strained per strain. Two weeks after release, Artemia eggs were again sprayed in the same amount. The number of adults and larvae per strain of the red-tailed thrips two-and-two days after release is shown in Table 5.

(Example 5)
Strawberry seedlings were fixedly planted in a pot, and 50 Tyrichidae bugs were released per strain, and at the same time, 1 g of Artemia eggs were strained per strain. The number of adults and larvae per one strain of Pleurocybium planicata 4 and 11 days after release is shown in Table 6.

(Example 6)
Strawberry seedlings were fixedly planted in a pot, and 50 swaursky phytoseiids were released per strain, and at the same time, 100 mg of Artemia eggs per strain were sprayed to the stock. The number of adults, juveniles and eggs laid per strain of the Swarskiy phytoseiid mite is shown in Table 7 after 6 days, 11 days and 28 days after release. In addition, investigation after 28 days of free feeding was done by washing out.

  According to the present invention, the natural enemies of the present invention, which is an effective population for pest control, can be maintained for a long time in the field of a plant having a shortened stem. Preferably, the population of the natural enemy of the present invention can be stably maintained at a certain level or more in the field of a plant having a shortened stem throughout the season with less flowers and pollen. As a result, an excellent pest control effect using natural enemy organisms can be obtained, and it is possible to realize farming using IPM. Further, since the method of the present invention can reduce the work load on workers, it is also possible to realize farming using IPM in this respect. Therefore, the method of fixing natural enemies and the method of controlling pests of the present invention are extremely useful industrially.

Claims (12)

  A method of fixing a natural enemy to the field, comprising the steps of releasing the natural enemy in the field of a plant having a shortened stem, and spraying an Artemia egg on the field.   2. The method according to claim 1, wherein the natural enemy is at least one member selected from the group consisting of red stinging thrips, black-and-white stink bug and swalski phytophagid mites.   The method according to claim 1 or 2, characterized in that the natural enemy is a red-tailed thrips.   The establishment method according to any one of claims 1 to 3, wherein the plant having a shortened stem is a strawberry.   The method according to claim 4, wherein the eggs of Artemia are sprayed on the crowns of strawberries.   The fixing method according to any one of claims 1 to 5, wherein the Artemia egg is a dry and durable egg.   A pest control method comprising the steps of releasing natural enemies in a field of a plant having a shortened stem, and spraying an Artemia egg on the field.   The pest control method according to claim 7, characterized in that the natural enemy is at least one selected from the group consisting of red stinging thrips, black-and-white stink bug and swalski phytophagid mites.   The pest control method according to claim 7 or 8, characterized in that the natural enemy is a red-legged thistle.   The pest control method according to any one of claims 7 to 9, wherein the plant having a shortened stem is a strawberry.   The pest control method according to claim 10, wherein the egg of Artemia is sprayed on a crown of a strawberry.   The pest control method according to any one of claims 7 to 11, wherein the Artemia egg is a dried and durable egg.