JPS5941962B2 - Composition for capturing small flying insects - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is particularly useful for the treatment of, for example, the whitefly (Trialeurodes vaporarioru).
The present invention relates to a composition for capturing small flying insects such as P. m., Hemiptera, Whitefly family).

Among the Hemiptera, the Phyllidae includes psyllids, aphids, and
It belongs to the group of scale insects, and adults are small insects with a body length of about 1 to 3 mm. They live in large numbers on the undersides of leaves of plants, and like aphids and scale insects, they suck a large amount of sap from Km and produce large amounts of dense liquid. to be discharged.

This causes soot pathogens to propagate, adversely affecting the growth of plants and significantly reducing the commercial value of fruits and vegetables, ornamental plants, and the like.

Whiteflies are originally tropical and subtropical insects that are native to Central America, but with the development of greenhouse cultivation, they have spread throughout the world and are now said to be a global pest of greenhouse horticulture crops.

In Japan, more than 160 types of plants have been confirmed to be parasitic, including vegetables such as tomatoes, eggplants, green peppers, cucumbers, melons, capocha, strawberries, green beans, chrysanthemums, and lettuce, as well as poinsettia, Tsukusha, belargonium, and geranium. It infects most of the major greenhouse horticulture crops, including flowering trees such as , bibiscus, hebe, frimula, cresotine, and lantana, causing great damage.

Moreover, these whiteflies occur frequently, and under certain conditions, one generation passes every 3 to 4 weeks, and eggs, larvae, spiders, adults, etc. are usually constantly intermingled in and around the greenhouse. .

In order to exterminate such whiteflies using chemicals, the chemicals used must not only have a high insecticidal effect, but also take measures against the emergence of drug-resistant species.

Furthermore, when applying the agent, consideration must be given to toxicity to the human body and harm to plants, especially when spraying in a relatively narrow and closed greenhouse.

At present, there is no drug that satisfactorily solves the above-mentioned problems.

Instead of using chemicals, a sticky trapping agent is applied to ribbon-shaped paper, etc., and it is colored yellow to make it attractive to whiteflies. It has been recognized that the method of sticky-trapping whiteflies by hanging them at appropriate intervals in a greenhouse where whiteflies fly does not have the above-mentioned drawbacks and has a good trapping effect, and this method is now becoming widely used. .

Adhesives for the adhesive capture of sanitary pests, such as flycatcher paper and cockroach trapping materials, have been known for a long time. It turns out that it is not necessarily suitable for catching.

In other words, as mentioned above, the body length of the whitefly is 1 to 3.
They are very small flying insects, measuring only millimeters in size, and therefore their impact energy against the adhesive layer is also very small.

It has been found that an adhesive for capturing such substances needs to have both viscosity and appropriate softness.

In addition, in order to capture flying insects, it is effective to hold an adhesive layer vertically in the flight space in the same way as the conventional No-Nitri ribbon, but in this case, it is difficult to capture flying insects at relatively high temperatures such as in a greenhouse. It must also not cause the adhesive to "drip".

The property of not "dripping" and the aforementioned softness are, if anything, contradictory properties.

Furthermore, the adhesive itself is desirably colorless and transparent so that it can be colored in a desired color.

This is because, as mentioned above, whiteflies and the like are attracted to yellow.

Furthermore, in order to use it in a greenhouse, it is necessary that there is little deterioration due to solar radiation and deterioration due to dew condensation due to temperature differences between day and night.

In addition, it is desirable that the adhesive has good workability when applied to a substrate such as paper, and that the adhesive does not separate or settle during storage.

An object of the present invention is to provide a trapping composition that has the above-mentioned properties and is particularly useful for trapping small flying insects such as whiteflies.

That is, the capture composition of the present invention has a number average molecular weight of 1200.
It is characterized by comprising a polypropylene having a weight of 90 to 99% and a weight average molecular weight of 1 to 10% by weight of medium-high molecular weight atactic polypropylene having a weight average molecular weight of 20,000 or more.

In the present invention, polybutene is a copolymer obtained by polymerizing a butane-butene fraction produced in the petroleum or petrochemical industry, which is mainly composed of imbutylene and partially contains n-butene.

The polybutene may be hydrogenated.

In the present invention, the number average molecular weight of polybutene is 1200
3,000 to 3,000 are used.

In the present invention, atactic polypropylene (hereinafter abbreviated as "APP") refers to amorphous polypropylene having an atactic molecular arrangement.

Several threads of such APP are produced as a by-product during the manufacturing process of polypropylene (PP), which has a high degree of crystallinity and has an isotactic molecular arrangement.

APP differs depending on the type of PP it is based on, for example, propylene homopolymer or random or block copolymer of propylene and a monomer such as ethylene, and also due to differences in the manufacturing process, especially the solvent and separation temperature of APP. It is known that there are various types, ranging from low molecular weight ones to very high molecular weight ones, and their physical properties are also quite different.

In the present invention, for convenience, the weight average molecular weight is 1000~
Those with a molecular weight of less than 20,000 are called low molecular weight APP, and
Those having a weight average molecular weight of 20,000 to 50,000 and those having a weight average molecular weight of 20,000 to 50,000 or more are referred to as medium-high molecular weight APP, and among these, medium-high molecular weight APP having a molecular weight of 20,000 or more should be used.

In general, polybutene has adhesive strength and sufficient softness,
Although it has a high ability to capture whiteflies, it has a strong tendency to drip when applied alone to a substrate and the coated surface is kept vertical.

It was found that when medium-high molecular weight APP was added to polybutene in a specific composition range, the above-mentioned dripping property was significantly improved, and it did not have any negative effects on properties such as transparency, weather resistance, and workability. .

As mentioned above, APP is obtained as a by-product during PP production, so it is easily available and relatively inexpensive, making it a preferred additive.

In a composition comprising polybutene having a number average molecular weight of 1,200 to 3,000 and APP having a weight average molecular weight of 20,000 or more, if the APP content is less than 1% by weight, the effect of improving the dripping property is insufficient, which is undesirable.

Moreover, if the APP content is more than 100% by weight, the whitefly trapping ability will be lowered and the viscosity will be higher, which will lower the workability, which is not preferable.

Note that it is also possible to obtain an effective capture composition using polybutene with a number average molecular weight of less than 1200 or low molecular weight APP with a weight average molecular weight of less than 20000, but in that case it is necessary to select an appropriate composition range. is necessary.

A patent application for such a composition was filed at the same time as this application.

To capture small flying insects using the composition of the present invention,
Preferably, the composition is applied to a suitable substrate such as paper, plastic film, board, etc., and placed at the flight site of the small insects to be controlled.

In particular, the composition is applied to a ribbon-shaped paper, rolled into a roll, placed in a cylindrical container made of plastic, etc., for convenient handling, and when used, the rolled ribbon is pulled out from the cylindrical container. The so-called “
It is preferable to form it into a ``baetri ribbon'' shape.

Rasha paper or kraft paper is suitable as a base for applying the composition.

The coating may be carried out by heating the composition or by dissolving it in an appropriate solvent to adjust the viscosity.

However, the method of using the composition of the present invention is not necessarily limited, and it can be used in a variety of ways as a trapping material for small flying insects.

The composition for capturing small flying insects of the present invention is for adhesion capturing of small insects, and does not cause any harm to the human body, animals or plants, unlike when insects are killed with chemicals.
It can be used safely even in closed spaces such as greenhouses, and it does not have any drawbacks such as the generation of drug-resistant species.

The composition of the present invention exhibits an excellent trapping ability especially for very light small insects such as the whitefly, and also does not have the disadvantage of falling when held vertically in the form of a fly ribbon.

Furthermore, it has strong weather resistance, is less susceptible to deterioration due to solar radiation or dew condensation, and can maintain a long life even in places with relatively high temperature and high humidity, such as greenhouses.

Furthermore, since the composition itself is colorless and transparent, it can be easily colored in any desired color by, for example, coloring the mount, and a preferred color can be selected depending on the type of insect.

Furthermore, the workability when applying it to the mount is good, and the materials are relatively inexpensive, so it is very economical overall.

The composition of the present invention can be used to capture small flying insects of the family Whiteflies such as the whitefly, as well as other small flying insects such as winged aplumines, Thrylapsidae, flies, stinging beetles, and mosquitoes. You can also use it effectively.

Next, a method for evaluating the performance of the composition of the present invention will be explained.

(υ Whitefly trapping ability) Apply the sample solution to both sides of yellow paper in an amount of 100?/ctA per side (-1 Observe the trapping condition with the naked eye and evaluate the trapping ability for on-site whiteflies according to the criteria listed below. average value of 5 series).

○ Excellent capture ability, almost none escape △ Some escape even if captured Less than 10% × 〃
More than 10% (2) Dripping test Pour the sample solution onto yellow paper (3.8 x 15 cm), 1% per side.
001/c shoulder amount is applied to both sides, left at room temperature for 1 day, and then suspended in an atmosphere at 50° C. for 24 hours to measure the remaining amount of the sample solution.

○ 85 coefficients or more remaining △ 〃 60-85 coefficients × 〃 60 coefficients or less (3) Mix the transparent sample solution, apply it on yellow paper, and observe the change in color tone with the naked eye.

○ Colorless and transparent with no change in color tone × Slightly cloudy and cloudy in color Example Polybutene and AP having the number average molecular weight shown in Table 1
Regarding the composition prepared using P at the ratio shown in the same table,
Whitefly trapping ability, dripping properties, and transparency were tested.

The results are shown in Table 1. It has been shown that the composition of the present invention is excellent in terms of whitefly-capturing ability, dripping properties, and transparency.

Claims (1)

[Claims] 1. A composition for capturing small flying insects comprising 90 to 99% by weight of polybutene having a number average molecular weight of 1,200 to 3,000 and 1 to 10% by weight of medium-high molecular weight atactic polypropylene having a weight average molecular weight of 20,000 or more.