JPS5941961B2 - Composition for capturing small flying insects - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is particularly useful for the treatment of insects such as Triat eurodes uaporarier.
The present invention relates to a composition for capturing small flying insects such as P. um, Hemiptera, Prunidae).

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 millimeters.They live in large numbers on the underside of plant leaves, and like aphids and scale insects, they suck a large amount of sap from plants and drain the chamber fluid. Excrete large quantities.

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.

Parasitism has been confirmed in more than 160 types of plants in Japan, such as tomatoes, eggplants, green peppers, cucumbers,
Vegetables such as melons, kapocha, strawberries, green beans, chrysanthemums, lettuce, poinsettia, tsukusha, belargonium, geranium, hibiscus, hebe, primula,
It parasitizes most of the major greenhouse horticulture crops, including flowering trees such as clematis and lantana, causing great damage.

In addition, such whiteflies occur frequently, and under certain conditions one generation passes every three to four weeks, and eggs, larvae, spiders, adults, etc. are usually mixed together 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 spray, consideration must be given to toxicity to humans and harm to plants, especially when spraying in a relatively small, closed greenhouse.

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

Instead of using chemicals, we use a "fleet ribbon" in which a sticky trapping agent is applied to a paper ribbon or the like and colored yellow to make it attractive to whiteflies, which attracts whiteflies. It has been recognized that the method of sticky trapping by hanging at appropriate intervals in a greenhouse does not have the above-mentioned drawbacks and has a good trapping effect, and has recently become widely used.

Adhesives for the adhesive capture of sanitary pests, such as flypaper and cockroach traps, have been known for a long time, but conventionally known adhesives are especially suitable for capturing small, lightweight insects such as whiteflies, as described below. It turns out that is not always appropriate.

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

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

In addition, in order to capture flying insects, it is effective to hold the adhesive layer vertically in the flight space, similar to the conventional fly fly ribbon, but in this case, even at relatively high temperatures such as in a greenhouse, the N of the adhesive It must not cause any dripping.

The property of not sagging 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 particularly 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 the whitefly.

That is, the capture composition of the present invention contains 50 to 9% by weight of polypropylene having a number average molecular weight of 300 to less than 1,200 and 3 to 50% by weight of medium-high molecular weight active polypropylene having a weight average molecular weight of 20,001a or more. It is characterized by being 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 isobutylene and partially contains n-butene.

The polybutene may be hydrogenated.

In the present invention, polybutene having a number average molecular weight of 300 to less than 1,200 is used.

Furthermore, in the present invention, atactic polypropylene (hereinafter simply referred to as rAPPJ) refers to amorphous polypropylene having an atactic molecular arrangement.

Such APP is produced in several quantities 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 i, ooo
Those with a weight average molecular weight of less than ~20,000 are referred to as low molecular weight APP, and those with a weight average molecular weight of 20,000 to 50,000 or higher are referred to as medium-high molecular weight APP.
Among these, APP with a middle to high molecular weight of 20,000 J2 or more is used.

In general, polybutene, which has a relatively small molecular weight, has adhesive strength and sufficient softness, and has a high ability to capture whiteflies, but when used alone, it has a strong tendency to drip when applied to a substrate and the applied surface is kept vertical. .

This is especially true for polybutenes with a number average molecular weight of less than 300, so polybutenes with a number average molecular weight of 300 or more are used.

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. .

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

In a composition comprising polybutene with a number average molecular weight of 300 to less than 1,200 and APP with a weight average molecular weight of 20.000124 or more, if the APP is less than 3 weight,
The improvement effect on the dripping property is insufficient and undesirable.

Moreover, if the APP exceeds 50% by weight, the whitefly trapping ability will be lowered, and the viscosity will increase, which will reduce workability, which is not preferable.

Note that it is preferable to change the amount of APP added according to the molecular weight of the polybutene used.

Therefore, it is more preferable that the number average molecular weight is 300, for example.
For polybutene with a relatively low molecular weight of less than 600 and 600
0 weight, or a number average molecular weight of 600 to 1.
For medium molecular weight polybutenes below 200,
It is appropriate to use the medium-high molecular weight APP in an amount of 3 to 30 weight cents based on the total amount of the composition.

An effective trapping composition can also be obtained using polybutene with a number average molecular weight of 1,200 or more or low molecular weight APP with a weight average molecular weight of less than 20,000, but in that case, an appropriate composition range may be used. It is necessary to select

A separate patent application was filed for such a composition 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 a place where the small insects to be controlled fly.

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 make it into a "IJ IJ bong 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 harm to the human body, animals or plants, as is the case when insects are killed by 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 whiteflies, and also does not have the disadvantage of sagging 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 and 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 is effective for capturing small flying insects of the family Whiteflyidae, such as the whitefly, as well as other small flying insects such as winged aphids, Thrylapsidae, flies, stink bugs, and mosquitoes. Can be used for

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

1 Whitefly-capturing ability Apply sample solution to yellow paper at 100 f? per side. /cwt on both sides, visually observe the state of trapping, and evaluate the trapping ability for on-site whiteflies according to the following criteria.

(Results are average values of 5 series) ○ Excellent capture ability, almost no escapes △ Some escape even if captured Less than 10%×
〃 More than 10% 2 Drip test Pour the sample solution onto yellow paper (3.8 x 15 cm), 1% per side.
00? /crA is applied to both sides, left at room temperature for one day, and then suspended in an atmosphere at 50° C. for 24 hours to measure the remaining amount of the sample solution.

O remaining 85% or more Δ 60-85% × 60% 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)

[Scope of Claims] 1 Polybutene with a number average molecular weight of 300 to less than 1,200 and a weight average molecular weight of 50 to 9% and a weight average molecular weight of 20.0
00 or more medium-high molecular weight atactic polypropylene 3~
A composition for capturing small flying insects consisting of 50% by weight. 2 Polybutene with a number average molecular weight of 300 to less than 600 and a weight ratio of 50 to 95 and a weight average molecular weight of 20.000
Medium-high molecular weight acrylic weight kupolypropyref 5-50
The composition for capturing small flying insects according to claim 1, which comprises a weight factor. 3 Polymers with a number average molecular weight of 600 and less than 1.2:00 and a weight ratio of 0 to 9, and a weight average molecular weight of 20,
0O09J, above medium-high molecular weight active polypropylene 3-30 wt. 7. Claim No. 1 consisting of
A composition for capturing small flying insects as described in .