CN108450206B - Regulation and control method for reducing harm of flat leaf bees on cheek - Google Patents
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Abstract
The invention discloses a regulation and control method for reducing harm of flat leaf bees on gills, and belongs to the field of ecological control of forestry harmful insects. The method for regulating and controlling the harm of the flat leaf bees reduces the number of insect populations in the ecological system, which are in positive connection with species of the flat leaf bees, or increases the number of insect populations in negative connection with species of the flat leaf bees, so that the population number of the flat leaf bees is maintained at a lower level, and the harm of the flat leaf bees to pine tree species is reduced. The regulation and control method for reducing the harm of the flat leaf bees further comprises the step of influencing the structure and population quantity of the insect community by regulating and controlling forest stand factors in the ecological system, such as canopy closure degree, forest stand density and the like, so that the aim of reducing the harm of the flat leaf bees is fulfilled.
Description
Technical Field
The invention relates to a regulation and control method for reducing harm of flat leaf bees on a branchia, in particular to a method for regulating and controlling insect communities to reduce harm of the flat leaf bees on the branchia, and belongs to the field of ecological control of harmful insects in forestry.
Background
Forest pest and disease damage is called as 'smokeless fire', causes serious harm to the forest ecological environment, is an important factor for hindering the development of Chinese forestry, and how to effectively and continuously regulate forest pest is the biggest problem for forest pest control workers. The essence of Ecological control (EPM) is to emphasize sustainable Pest control, follow the principles of high efficiency, harmonious structure, continuous control, economy and reasonability, and adopt an Ecological method to control Ecological or biological factors to achieve the Ecological goal, thus being the best choice among numerous means for controlling forest pests. The ecological regulation can be used as the most main aspect for guiding control technology and measures, and can meet the requirements of continuously and effectively meeting multiple targets of human beings in the practice of controlling forest pests.
Queen wasps (Cerphalcia kunyushanhanica Xiao) are specific foliar feeding insects of Kunstanshan and also main pests of pine species, and are serious red pine, black pine, China pine and the like which are harmful to Kunstanshan at present. Currently, for the prevention and treatment of the wasps leucotrichia in Kunze, the mainstream method applied in production is still chemical prevention and treatment, and is not suitable for large-area popularization and application in the Kunze natural protection area; in the early stage, the associativity of the Kunzea flat leaf wasps and host plants is researched, the harm of the Kunzea flat leaf wasps is reduced by a forest stand structure and tree species configuration, and the method belongs to a part of ecologically-controlled flat leaf wasps. However, the generation and harm of the Kunzea leucotrichia are closely related to vegetation and the structure of the forest insect community, so that the ecological regulation and control method for controlling insects by using insects for the Kunzea leucotrichia is perfected and developed, and the ecological regulation and control method has important significance.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for regulating and controlling an insect community to reduce the harm of flat leaf bees on pinus species, wherein the method maintains the population quantity of the flat leaf bees at a lower level by regulating and controlling the insect community in an ecological system.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the invention discloses a regulation and control method for reducing harm of flat leaf bees on gills, which comprises the following steps: reducing the number of insect populations in the ecosystem which are in positive association with species of the flat leaf bees, or increasing the number of insect populations in the ecosystem which are in negative association with species of the flat leaf bees.
Wherein the insects having positive association with species of Bluedora gilsonii comprise: any one or more of monochamus alternatus, longicorn beetle, turgomorpha, masson pine horned neck elephant, transverse-pit-cut bark beetle, longitudinal-pit-cut bark beetle, big turtle soil bug, green leather soil bug, Chinese avaricious foot beetle or bee-spotted stinkbug.
The insects having negative association with species of the flat leaf wasp include: any one or more of wood destroying ants, corn hair ants, caerulea, Forficula auricularia, black ground stinkbug, yellow foot stinkbug, brown rhinacid bugs, cricetulus terrestris or Chinese larvas.
The invention discloses a regulation and control method for reducing harm of flat leaf bees, which is used for reducing the number of insect populations in an ecological system, wherein the insect populations have positive connection relationship with species of the flat leaf bees, and the regulation and control method comprises the following steps: the regulation and control are carried out manually or indirectly. Wherein the artificial direct regulation comprises: trapping and killing insects which are in positive connection with species of the flat leaf wasps; preferably, the broad-spectrum type pine trunk-boring pest attractant is arranged to trap and kill any one or more of monochamus alternatus hope, longipedunculus akanus, turpinus, horned neck elephant, transverse-pit-cut-tip beetle or longitudinal-pit-cut-tip beetle, and the bait is arranged to trap and kill any one or more of euonymus grandis, lygus hesperus, Chinese avaricious stephania or stipa longissima; the bait is preferably propylene glycol. The artificial indirect regulation comprises the following steps: cleaning up the pine plants killed by the pests damaging the trunk in the forest, and carrying out bagging fumigation treatment or centralized destruction treatment on the branches so as to reduce the population density of monochamus alternatus hope and the like in the forest; wherein the Pinus plants include, but are not limited to: any one or more of Pinus densiflora, Pinus nigra (p.thunbergii), Pinus koraiensis (p.koraiensis), Pinus sylvestris (p.armandii), Pinus taeda, Pinus banksiana (p.banksiana) or Pinus majaponensis (p.resinosa).
The invention discloses a regulation and control method for reducing harm of flat leaf bees, which comprises the following steps of increasing the number of insect populations in an ecological system, wherein the insect populations have negative connection relationship with species of the flat leaf bees: the regulation and control are carried out manually or indirectly. Wherein the artificial direct regulation comprises: artificially propagating insect populations with negative connection relation with species connection of flat leaf bees, and transplanting the insect populations into forests; the artificial indirect regulation comprises the following steps: controlling the canopy density of the forest stand or controlling the number ratio of host plants of the flat leaf bees or controlling the number ratio of the host plants of the flat leaf bees or controlling the canopy density of the forest stand.
The invention discloses a regulation and control method for reducing harm of flat leaf bees on gills, which further comprises the following steps: regulating and controlling forest stand factors, namely controlling any one or two of forest stand canopy density or gill flat-leaf bee host plant density. Wherein the host plant comprises: any one or more of pinus densiflora (pinus densiflora), pinus nigra (p.thunbergii), pinus koraiensis (p.koraiensis), pinus armandii (p.taeda), pinus banksana (p.banksiana) or pinus majavanica (p.resinosa).
The flat leaf wasps are preferably Queen mountain flat leaf wasps (Cephalcia kunyushanhanica).
The invention analyzes the species connectivity of the Kunze mountain flat leaf wasp and forest insects, and finds that 40 pairs of the 76 species are extremely significant or significant connections and account for 52.63% of the total number of pairs. Wherein, 25 insect species which are in extremely obvious and obvious positive connection relation with the Kunzea blumea wasp and 15 insect species in negative connection relation are provided. The euglena wasps and forest insects including monochamus alternatus, longicorn, turgomorpha, masson pine horned neck elephant, transverse pit cut tip beetle, longitudinal pit cut tip beetle, big turtle soil bug, green leather soil bug, Chinese avaricious step beetle and bee stinkbug are in extremely obvious forward connection relation; the medicament is in extremely obvious negative connection relation with wood destroying ants, corn hair ants, caenorhabditis, Forficula auricularia, black ground rhynchophorus, yellow foot rhynchophorus, brown rhynchophorus, cricotharynus fasciatus and Chinese larvas. Therefore, the purpose of reducing the harm of the Kunze flat leaf bees can be achieved by reducing the number of insect populations in the ecosystem, wherein the species connectivity of the ecological system and the Kunze flat leaf bees is positive connection, or increasing the number of insect populations in the ecosystem, wherein the species connectivity of the ecological system and the Kunze flat leaf bees is negative connection.
According to the invention, through setting the attractant to lure and collect the pine trunk-boring pests, the numbers of the pine trunk-boring pests including monochamus alternatus hope, longipedunculus akanus, turgomorpha, masson pine horned neck elephant, transverse-pit tip-cutting bark beetle and longitudinal-pit tip-cutting bark beetle in the second year are obviously reduced, and the average nest number of the Queenshank fasciola giganteus treated by setting the attractant is obviously reduced, and the difference is obvious (P is less than 0.05).
The test for cleaning vertical withered pine trees in forests shows that the quantity of stem borers such as monochamus alternatus hope, longicorn, turquoise and the like induced and collected after the vertical withered trees are cleaned is obviously less than that before the vertical withered trees are cleaned, the mouth density of the Kunzea wasp is obviously lower than that before the vertical withered trees are cleaned, and the difference between the two is obvious (P is less than 0.05).
The test for adjusting the forest stand canopy density shows that the average mouth density of the quan wasp blumeria Kunji blumea on the standard land in the next year after thinning (thinning strength is 15 plants/mu) is obviously reduced; the quantity of wood destroying bow-back ants, Forficula auricularia, yellow-foot stinkbug and Chinese pirate gadflies in the forest is obviously increased, and the difference is obvious compared with that before thinning (P is less than 0.05).
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
the invention controls the insect community in the ecosystem, namely reduces the number of the insect population in the ecosystem which is positively connected with the fasciola branchialis species, or increases the number of the insect population in the ecosystem which is negatively connected with the fasciola branchialis species, and controls the forest stand factors such as the canopy density, the forest stand density and the like to influence the structure and the population number of the insect community, so that the population number of the fasciola branchialis is maintained at a lower level, thereby achieving the purpose of reducing the harm of the fasciola branchialis.
Definitions of terms to which the invention relates
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
The term "species association": a form of describing and measuring relationships between species is an objective reflection of the organic relationships that individual species interact with each other in different habitats, usually due to differences in biotopes that affect the distribution of species.
The term "negative coupling": means that one plant species rejects it by affecting another species, which may be purely steric exclusion, competition, chemical interaction, or that they adapt to and respond differently to a habitat or have different environmental requirements.
The term "forest stand": refers to the internal structural features of the forest. I.e., forest sections where the tree species composition, forest origin, forest layer or facies, forest type, forest age, grade, volume, and other factors are substantially similar and clearly distinct from adjacent sections.
The term "tree density": the number of the trees in a unit area reflects the sparse and dense conditions of the forest stand.
The term "degree of occlusion": the degree of the crown of the arbor covering the ground in the forest is an index reflecting the density of the forest stand.
The term "trunk-boring pest": refers to the pest group harming the branch parts of the forest, including phloem and xylem. Most hazards are also commonly referred to as "secondary pests" due to the debilitating woods that suffer from various adverse factors.
The term "natural enemy insect": refers to a group of insects that are parasitic or prey on other insects, and is an important group of insect populations.
Detailed Description
The invention will be further described with reference to specific embodiments, and the advantages and features of the invention will become apparent as the description proceeds. It is to be understood that the described embodiments are exemplary only and are not limiting upon the scope of the invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be within the scope of the invention.
Example 1 trapping pine trunk-boring pest test
Arranging 1 trap at the center of a standard place #4, a standard place #12 and a standard place #22, using a broad-spectrum pine tree trunk-boring pest attractant to trap trunk-boring pests, and checking and changing the pesticide 1 time every month in 4-9 months; the number of nests of the wasps with the flat leaves at the same time and in a standard ground before and after trapping is respectively investigated, namely, the nests on the central standard wood are counted in the standard ground by using a mode of combining visual observation and a telescope.
Statistics shows that in a standard ground treated by the pine trunk-boring pest attractant, the numbers of pine trunk-boring pests including monochamus alternatus hope, longipedunculus akana, turgomorpha, masson pine horned neck elephant, transverse-pit-cut bark beetles and longitudinal-pit-cut bark beetles in the next year are obviously reduced compared with those before treatment; and the average nest number (87) of the quandaria wasps treated by the attractant is obviously lower than that (162) of the quandaria wasps before treatment, and the difference between the two is obvious (P is less than 0.05).
Example 2 stand log cleaning test
3 standard lands of 30m multiplied by 30m are arranged in forest stands with more pure red pine forest withered trees around Kunze Heilongtan, 1 time of mouth density (number of nest clearing, method same as above) of Queen mountain flat leaf wasps and population density (attractant set and concentrated, method same as above) of pine trunk borers in forest are respectively investigated before and after cleaning the withered trees, and the difference between the number of trunk borers in the standard lands before and after cleaning and the number of the Queen mountain flat leaf wasps is compared.
Statistical results show that the number of trunk borers such as monochamus alternatus hope, longipedunculus akaara, turgomorpha, masson pine horned neck elephant, transverse-pit tip-cutting bark beetle and longitudinal-pit tip-cutting bark beetle induced after the cumquat cleaning is obviously less than that before the cumquat cleaning, the mouth density of the Kunzea wasabi is obviously lower than that before the cumquat cleaning (29 heads), and the difference between the two is obvious (P is less than 0.05).
Example 3 standing forest canopy density adjustment test
When the Kunzhe mountain forest field forest department carries out forest thinning tending (thinning force is 15 plants/mu), 3 pieces of standard land are synchronously tracked and set, and the mouth density (clear number of insect nests and the method are the same as above) of the Kunzhe mountain flat leaf bee in the standard land and other insect populations in the forest are respectively surveyed in the next year before thinning and after thinning. Investigation finds that the average mouth density of the flat leaf wasps in 3 standard plots in the next year after thinning is reduced from 54 heads to 31 heads; the quantity of wood destroying bow-back ants, Forficula auricularia, yellow-foot stinkbug and Chinese pirate gadflies in the forest is obviously increased, and the difference is obvious compared with that before thinning (P is less than 0.05).
Experimental example 1 species coupling of Kunzea Flat leaf bee and forest insects
1. Research method
1.1 study area overview and plot set-up
Kunzushan (E121 degrees 41 '34' to 121 degrees 48 '04', N37 degrees 11 '50' to 37 degrees 17 '22') is located in the east of the Shandong peninsula, belongs to a warm zone season climate, the annual precipitation is 800-1000 mm, the annual average temperature is 11-12 ℃, the frost-free period is 200-220 d, the forest soil belongs to forest brown soil, and sandy loam is mainly used. Kunzushan is the original land and natural distribution center of red pine in China and northeast Asia, the red pine is distributed in the area from foot to elevation 800m, and forms zonal natural secondary forest vegetation together with deciduous broad-leaved forest.
According to the structure, the function and the characteristics of a forest area ecosystem, a standing environment, 50 permanent sample plots are arranged in a forest area range, the specification of each sample plot is 30m multiplied by 30m, the width of a sample plot protective belt is 30m, each sample plot is positioned by a GPS instrument, indexes such as the altitude, the slope direction, the slope position, the slope gradient and the like of the sample plot are measured and recorded, and permanently fixed sample plot marks are made on four corners and the middle points of side lines of the sample plot by cement piles or marble piles. The set permanent sample plot comprises all forest stand types in the Kunzwasabi forest region, including needle-leaf tree pure forest, needle-broad leaf tree mixed forest, needle-needle tree mixed forest, broad leaf tree mixed forest and the like; when setting the sample plot, the standing factors such as slope shape, slope position, altitude, soil condition and the like are also considered, and the method has sufficient representativeness.
1.2 insect species investigation
1.2.1 investigation of the Fingered Butterflybush
According to the characteristic that the larva of the Pinus massoniana is silked and netted at the base of a pine tree leaf cluster to form a worm nest, high-branch scissors are used for shearing sampling branches, the structure of the worm nest is observed, and the number of the larva in the worm nest is counted; statistics shows that the insect nest is formed by respectively nesting and converging 2-4 larvae, so that the number of insect mouths on each pine tree is calculated according to 3 times of the number of the insect nest. The method of combining visual observation and telescope is adopted, each sample wood on the sample plot is divided into an upper layer, a middle layer and a lower layer, the number of insect nests is counted from four directions of south, east, west and north, and 3 times of the number of the insect nests is taken as the population density of the plant insects.
1.2.2 in-forest insect survey
(1) Surface layer insects: collecting by a pasteurization method, wherein the height of a plastic cup is 10cm, the caliber of the plastic cup is 7.8cm, and 1/4 positions above the cup wall are symmetrically perforated for 3 times so as to prevent excessive rainwater from losing specimens; adding the mixed liquid of propylene glycol and alcohol into a container in a ratio of 1: 1. A number of 5 cuvettes were placed at the center of each plot and at the midpoint of the center along the diagonal, and the fluid was collected and changed 1 time every 30 days.
(2) Pest borer: the slow-release broad-spectrum attractant for the trunk-boring pests is used for collecting (the attractant is subjected to an effective trapping distance test before the test), and one attracting core is arranged at the central position of each standard place for ensuring the trapping effect and changing the attracting core for 1 time every 30 days.
(3) Manual investigation: and when the surface layer insects and trunk-boring insects are investigated and collected each time, the leaf-eating insects are investigated in an artificial patrol mode, and different species and insect states are recorded.
1.3 data analysis
1.3.1 Overall connectivity test
The significance of the overall degree of association between species was examined using the ratio of Variance (VA). First, zero is made assuming that there is no significant linkage between species, and test statistics are calculated according to the following formula:
wherein S is the total number of the material, and N is the total number of the sample circles; t isjTotal number of study species present in plot j, niIs the number of plots in which species i appeared, and t is the average number of species in the plots; t is the variance of the total number of samples, S2T is the total species number variance and VR is the correlation index for all species. Under the condition of zero assumed independence, the expected value of VR is 1 when VR>1, indicating a net positive correlation between species as a whole, when VR<1, indicates that the population between species has a net negative correlation, and when VR is 1, indicates that the population between species has no correlation. The significance of the species associations was examined by calculating the statistic W ═ VR × N, and under independent assumptions, W fell at [ χ ] if the associations between species were not significant2(0.95)(N)，χ2(0.05)(N)]The probability in the interval is 90% (Schluter, 1984).
1.3.2X-shaped cross-linking property2Examination of
χ according to 2 x 2 tabulation2Statistics, the associations between the pairs tested were determined (Wangbaidan and Pendulin, 1985), and the formula was calculated as follows:
because of sampling discontinuity, chi is generally calculated by using the continuity correction formula of Yates2Value (zhangtun, 2004):
in the above formula, n is the total number of sample plots, and a is the sample plot of the Pink wasp and another insect speciesThe numbers b and c are the number of the sample plots with only 1 species appearing, d is the number of the sample plots with no two species appearing, when ad is>bc, the two species are positively coupled, when ad is present<And b, the two species are in negative connection. When x2<3.841(P>0.05), the two species are considered to be independently distributed, when χ2>6.635(P<0.01), the linkage between the two species is considered to be extremely remarkable, when 3.841<χ2<6.635(0.01<P<0.05), the species pair association is considered significant.
1.3.3 species Co-occurrence percentage IPC% linkage coefficient IACIndex of correlation degree of OchiaiOIIs calculated by
The calculation formulas are as follows:
if ad>bc，
If bc>ad, and d>a，
If bc>ad, and a>d，
According to the formula, IPC% value range is that the closer the value is to 1, the more tightly the positive association of the species pair is illustrated; i isOIHas a value range of [0, 1] also]The value is 0 in the absence of association between the two species, and 1 when the two species are in maximal association; i isACIs a correlation coefficient for describing the degree of interspecies linkage, and has a value range of [ -1, 1 [)]A value closer to 1 indicates a stronger positive association of the species, a value closer to-1 indicates a stronger negative association of the species, and a value of 0 indicates completion of the association between the speciesIs completely independent. The letters a, b, c, d in all the above formulas have the same meaning.
1.3.4 Point correlation coefficients IP, Cramer index ICIAnd Dice index IDIIs calculated by
The point correlation coefficient is expressed by a centered index with a variation from +1 to-1 through 0 (Wangbaiun and Pendulin, 1985), and is calculated by the formula:
the Cramer index is the square of the point correlation coefficient, and the formula is as follows:
the Dice is in the numerical range [0, 1], and as Cramer approaches 1, it indicates that the species has a stronger positive association with the organism (Parfrin et al, 2007). The formula is as follows:
2. results of the experiment
2.1 Overall Association measures between insect species
And calculating inter-species connectivity index VR (1.193) 1 by adding 76 insect populations in all the 50 investigated plots and the Queenshank flat leaf bee population according to a 50 x 77 binary data matrix, so that the Queenshank flat leaf bee and 76 insect species in the forest are in positive correlation on the whole.
2.2 species connectivity of Kunze Murphus and forest insects
Calculating and analyzing the connectivity of the Pink wasp and the insect species collected and checked on the 50 samples, and determining the positive and negative connection according to the method and the chi2The threshold values were determined one by one for the connectivity and strength of the connections between each insect species and the wasps queen, as shown in table 1 below. Only listed in Table 1The insect species with obvious and extremely obvious linking performance with the variety of the Pinus massoniana Kunzi in Kunze mountain is provided.
Of the 76 total species pairs, 40 were either very significant or significantly joined, accounting for 52.63% of the total logarithm; wherein, 25 insect species which have obvious positive connection relation with the Kunzea blumea and 15 insect species which have negative connection relation with the Kunzea blumea are provided. The euglena wasps are in an extremely obvious forward connection relationship with forest insects, namely monochamus alternatus, longipedunculus akaara, turgomorpha, masson pine hornneck elephant, transverse pit cut tip beetle, longitudinal pit cut tip beetle, big turtle soil bug, green leather soil bug, Chinese avaricious step beetle and bee cudweed bugs. The artificial bait is in extremely obvious negative direction connection relation with wood destroying ants, corn hair ants, caenorhabditis, Forficula auricularia, black ground rhynchophorus, yellow foot rhynchophorus, brown rhynchophorus, cricothyroid rhynchophorus, and Chinese largehead flies; the associativity of the phaea fusca and the queen wasp species is also significant negative association, but the phaea fusca is not included in the category of insects for regulating and controlling the queen wasp in the queen wasp considering that the phaea fusca belongs to a leaf eating pest harmful to broad-leaved trees.
TABLE 1 coupling index and χ between Kunzea oblate and forest insects2Statistics of inspection
Note: only the insect species linked to the chikuwa species in a very positive (×) and significant (×) relationship are listed in the table.
Claims (6)
1. A regulation and control method for reducing harm of flat leaf bees on cheek is characterized by comprising the following steps: reducing the number of insect populations in the ecosystem which are in positive association with species of the flat leaf bees, or increasing the number of insect populations in the ecosystem which are in negative association with species of the flat leaf bees; the insects which are positively linked with the species of the flat leaf bees are any one or more of monochamus alternatus, longipedunculus akaara, turgomorpha, masson pine horned neck elephant, transverse pit tip-cutting bark beetle, longitudinal pit tip-cutting bark beetle, big turtle soil bug, green leather soil bug, Chinese avaricious foot beetle or bee marginal bug; the insects which are in negative connection with species of the flat leaf bees are any one or more of wood destroying ants, corn hair ants, caenorhabditis, Forficula auricularia, black ground rhynchophyllus, yellow foot rhynchophyllus, brown rhynchophyllus, cricothyroid rhynchophyllus or Chinese larvas;
the flat leaf wasp is Kunze mountain flat leaf wasp (Cephalcia kunyushanhanica).
2. The method of claim 1, wherein the reducing the number of insect populations in the ecosystem that are positively associated with species of the gill flat leaf bees comprises: artificial direct regulation or artificial indirect regulation;
wherein the artificial direct regulation comprises: trapping and killing insects which are in positive connection with species of the flat leaf wasps;
the artificial indirect regulation comprises the following steps: cleaning up the pine plants killed by the pests damaging the trunks in the forest, and carrying out bagging fumigation treatment or centralized destruction treatment on the branches; wherein the Pinus plant comprises: any one or more of Pinus densiflora, Pinus nigra (p.thunbergii), Pinus koraiensis (p.koraiensis), Pinus sylvestris (p.armandii), Pinus taeda, Pinus banksiana (p.banksiana) or Pinus majaponensis (p.resinosa).
3. The control method according to claim 2, wherein the insects which are attracted and killed and have species associativity with the breviculmus branchianus are any one or more of broad-spectrum pine trunk borer attractant, Monochamus alternatus, Pinus massoniana corner neck trunk, lateral pit tip bark beetle or longitudinal pit tip bark beetle, and bait is attracted and killed any one or more of big turtle ground bugs, green leather bugs, Chinese avaricious step beetles or bee marginal bugs; the bait is propylene glycol.
4. The method of claim 1, wherein said increasing the number of insect populations in the ecosystem that are negatively coupled to the species connectivity of the flat leaf wasps comprises: artificial direct regulation or artificial indirect regulation;
wherein the artificial direct regulation comprises: artificially propagating insect populations with negative connection relation with species connection of flat leaf bees, and transplanting the insect populations into forests;
the artificial indirect regulation comprises the following steps: controlling the canopy density of the forest stand or controlling the number ratio of host plants of the flat leaf bees or controlling the number ratio of the host plants of the flat leaf bees or controlling the canopy density of the forest stand.
5. The method of regulating as claimed in claim 1, further comprising: controlling one or two of forest stand canopy density or gill flat-leaf bee host plant density.
6. The method of claim 4 or 5, wherein the host plant comprises: any one or more of pinus densiflora (pinus densiflora), pinus nigra (p.thunbergii), pinus koraiensis (p.koraiensis), pinus armandii (p.taeda), pinus banksana (p.banksiana) or pinus majavanica (p.resinosa).
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| CN102428907A (en) * | 2011-09-09 | 2012-05-02 | 惠州市神龙松材线虫病综合治理有限公司 | Method for treating dead and drying tree suffering from pine wood nematode disease |
| CN104838930B (en) * | 2015-05-29 | 2017-03-22 | 中国林业科学研究院森林生态环境与保护研究所 | Regulating method for alleviating harm of cephalcia kunyushanica to host plants |
| CN107337887B (en) * | 2017-07-31 | 2021-11-09 | 韩山师范学院 | Liquid rapid film-forming agent for preventing pine wood nematode disease diffusion |
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