JPS5941963B2 - 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 the order Hemiptera (order Hemiptera, family Whitefly).

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 underside of plant leaves, sucking large amounts of sap from plants like aphids and scale insects, and producing 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, lettuce, poinsettias, fuchsias, belargoniums, and geraniums. , hibisgas, hebe, primula, clematis, lantana, and other flowering trees, which are parasitic on most of the major greenhouse horticulture crops, causing great damage.

Moreover, such whiteflies occur frequently, and under certain conditions one generation passes in 3 to 4 weeks, and eggs, larvae, octopuses, adults, etc. are usually mixed with light constantly 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, adhesive trapping agent is coated on ribbon-shaped paper, etc., and it is colored yellow to make it attractive to whiteflies in the greenhouse. It has been recognized that the method of adhesion trapping by suspending fish at appropriate intervals does not have the above-mentioned drawbacks and has a good trapping effect, and this method has recently become widely used.

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

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 the adhesive used to capture such substances 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 adhesive layer 6 It must not cause any dripping.

This property of "no dripping" and the above-mentioned 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 trapping composition of the present invention is characterized by comprising 30 to 90 weight percent of polyb with a number average molecular weight of 300 to less than 600 and 10 to 70 weight percent of low molecular weight atactic polypropylene having a weight average molecular weight of less than 20,000. do.

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, the number average molecular weight of polybutene is 300 at °C.
600 to less than 600 is used.

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

This thin APP is produced as a by-product in the manufacturing process of polypropylene (PP) with a high degree of crystallinity and has an isotactic molecular arrangement. Due to differences in the homopolymer or random or block copolymers of propylene and monomers such as ethylene, and differences in the manufacturing process, especially the solvent and separation temperature of APP, the molecular weight ranges from low molecular weight to very high molecular weight. It is known that there are various types and their physical properties are 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 50,000 or more are referred to as medium-high molecular weight APP. Among these, low molecular weight APP having a molecular weight of less than 20,000 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 tends to drip when applied to a substrate and the applied surface is kept vertical. is strong.

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 has been found that when low molecular weight APP is added to polybutene in a specific composition range, the above-mentioned dripping properties are significantly improved, and there is no adverse effect 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 consisting of polybutene having a number average molecular weight of 300 to less than 600 and APP having a weight average molecular weight of less than 20,000, if the APP is less than 10% by weight, the effect of improving the dripping property is insufficient, which is not preferable.

Furthermore, if the APP exceeds 70% by weight, it is not preferable because the whitefly trapping ability becomes low and the viscosity becomes high, resulting in a decrease in workability.

It is also possible to obtain an effective trapping composition using polybutene with a number average molecular weight of 600 or more or medium-high molecular weight APP with a weight average molecular weight of 20,000 or more, but in that case, it is necessary to select an appropriate composition range. is necessary.

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 form it into a ``baetri ribbon'' shape.

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

When coating, the composition may be heated or dissolved 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 the disadvantage of producing 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 can be effectively used to capture small flying insects of the family Whiteflyidae, such as the whitefly, as well as other small flying insects such as winged aphids, thrips, flies, stink bugs, and mosquitoes. Next, a method for evaluating the performance of the composition of the present invention will be described.

(1) Ability to capture whiteflies A sample solution is applied to both sides of yellow paper in an amount of 100 g/i per side, and the state of capture is observed with the naked eye, and the ability to capture whiteflies is evaluated 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) Dripping test Pour the sample solution onto yellow paper (3.8 x 15 cm), 10% per side.
An amount of 0 g/CTL was 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.

○ Remaining 85 coefficients or more △ 〃 60 to 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 in the proportions 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 consisting of a polypropylene having a number average molecular weight of 300 to less than 600 and a low molecular weight atactic polypropylene having a weight average molecular weight of less than 20,000 and a weight ratio of 10 to 70.