HU203446B - Insecticide composition against members of genus homoptera and genus thysanoptera - Google Patents

Abstract

Insecticidal agent for controlling pests of the (sub)orders Homoptera and Thysanoptera, esp aphids and thrips, contains 80-95 wt% mixt of normal 10-20C paraffins (I) and 5-20 wt% surfactant, opt together with solvent.

Description

The present invention relates to insecticidal compositions useful for controlling pests of the species Homoptera and Thysanoptera, in particular aphids and thrips.

It is known that aphids and thrips are mainly used to control organophosphorus and carbamate compounds, and more recently synthetic pyrethroid formulations have been used. The pesticides are emulsified (suspended) in water and the plants are sprayed with the resulting composition.

The disadvantages of the aphids and thrips preparations used to date are that they contain toxic substances which are harmful to the health of humans and warm-blooded animals to a greater or lesser extent and that the treated agricultural products are contaminated with harmful substances. The use of present insecticide formulations also has a negative effect on soil, water sources and air purity. Along with killing pests, useful insects such as entomophages, honey bees, and wild pollinators of plants are also killed.

A major disadvantage of synthetic pesticides is that they produce resistance to the pest insect species upon repeated application. Therefore, there is always a need for newer and more effective formulations in plant protection, which are generally more expensive and often more toxic. For example, the resistance of the peach aphid Myzodes persicae to insecticide formulations of organic phosphorus can be eliminated by carbamate derivatives such as Pyrimicarb [(2-dimethylamino) -5,6-dimethyl-4-pyrimidinyldimethyl- carbamate], but recently this preparation has reduced biological activity. Tobacco thrips resistant to Dimetoate [0,0-dimethyl-S- (N-methylcarbamoylmethyl] dithiophosphonate] and other organic phosphorus compounds, the highly toxic insecticide preparation Trips tabaci, Metamidophos (amido- OS-Dimethyl-thiophosphate) There have been attempts to control peach aphids with different mineral oils, this pest causing various viral diseases in agricultural crops, but the results are all in potatoes (Tag-Ber. Akad. Ladwirtsch. - Wiss. DDR, No. 121, 1972, S. 33-38), both in peppers (J. Econ. Entomol. 70, No. 3, 1977, S. 309-315) and in tobacco (Arch. Phytopathol. U. Pflanzenschutz, Berlin). , 12, 1976, No. 1, S. 19-26) Negative Mineral oils are used in combination with organophosphorus insecticides to achieve early spring aphid activity in fruit trees.

The present invention relates to insecticidal compositions for controlling pests of the species Homoptera and Thysanoptera, in particular aphids and thrips. These formulations are effective against resistant populations of said insects and are non-toxic to humans and warm-blooded organisms.

The composition of the invention contains 80-95% by weight of normal C 10-20 paraffin, 20-5% by weight of a surfactant and optionally a solvent.

The composition can be used to spray tobacco, cotton, sugar beet, potato, vegetables, fruits and berries, and other crop seeds.

The composition of the present invention is extremely toxic to aphids and thrips, and its biological efficacy is consistent with conventional plant protection requirements. The composition is an emulsion concentrate used for spraying plants after emulsification in water.

The composition of the present invention is potent against all known insecticidal resistant insecticidal compositions. Its efficacy against tobacco thrips populations is 95.7% and that of peach aphids (resistant) is up to 92.3%. The composition of the present invention is more effective than the known composition B-58 (380 g / L Dimetoate) at a concentration of 150 g / L water.

The compositions of the present invention do not cause phytocidal damage to plants. When used, they have good toxicity against pesticides that are important in agriculture and highly resistant to pesticides. The active substance (paraffins) is non-toxic to humans and warm-blooded animals. The agricultural products treated with the composition do not contain harmful residues, since the insecticidal composition according to the invention does not contain stable chemical compounds or heavy metals.

The composition of the present invention can be mixed with the presently used insecticide, fungicide and acaricide formulations without causing damage to the crop.

The following examples illustrate the composition of the present invention and the efficacy of the compositions.

Example 1

Composition of the preparation

One kilogram of preparation contains the following components:

C14-C17 normal paraffin - 800 g

AB-31 Emulsifier - 200 g.

The AB-31 emulsifier is a 3: 1 mixture of ethoxylated alcohols and ethoxylated alkyl phenols.

The components are homogenized for 5 minutes,

Example 2

Efficacy against tobacco thrips in tobacco

400 and 560 g of the formulation and 150 g of the standard formulation B-58 are added to 100 ml of water (Table 1). Five leaves of the oriental tobacco attacked by thrips were taken per experiment and immersed in the prepared solutions for 5 seconds using leaves dipped in pure water as a control. Each leaf is then counted with live insects under a stereoscopic microscope. Following the treatment, the stems of the treated leaves are immersed in water in a glass flask and kept in open air under natural conditions. After 3 and 5 days, counts of live thrips on treated and control leaves were counted.

HU 203 446 Β

Efficacy is calculated using the Henderson-Tilton formula. Table 1 shows that the compositions of the present invention at 560 g / 1001 water yield good results. On day 7, the efficacy of the formulations reaches 95.7% and is significantly higher than the efficacy of formulation B-58, which is only 61.1%. From the results, it can be seen that the composition of the present invention greatly kills the population of tobacco thrips.

Example 3

Investigation of efficacy against peach aphid in oriental tobacco

400 g and 560 g of the composition of the invention and 150 g of the standard B-58, respectively, were added to 1001 of water (Table 2). Each experiment, the tobacco leaf, which is planted separately in pots, is sprayed with laboratory spraying equipment. Controls were treated with pure water only. Before treatment, the aphids (larvae and adult aphids) are counted on the plants with lupus. The plants were then kept in open air under natural conditions and after 3 and 7 days, the number of insects on the treated leaves and control leaves was counted. Efficacy is calculated using the Henderson-Tilton formula. Table 2 shows that the composition according to the invention shows the best effect on the 7th day at a dosage of 560 g of composition / 100 l of water. The fact that B-58 killed less than 50% of the aphids shows that the population is extremely resistant to Dimetoate and other organic phosphorus insecticides. Under the given conditions, the formulations of the present invention have a biological efficacy of 92.3% on Day 7 and are fully satisfactory.

Table 1

Tobacco thrips test on oriental tobacco

The preparation The dosage is g / 1001 water Effectiveness%, 3 days after 7 days of treatment

1. According to the invention 400 86.3 92.1 preparation 2. According to the invention 560 90.6 95.7 preparation 3. B-58 150 68.2 61.1 4. Untreated control 0.0 0.0

Table 2

Experiment with peach aphid on oriental tobacco

Dosage Dosage% efficacy in g / 1001 water for 3 days after 7 days of treatment

1. According to the invention 400 82.4 88.6 preparation 2. According to the invention 560 89.2 92.3 preparation 3. B-58 150 49.5 40.3 4. Untreated control 0.0 0.0

Claims (1)

PATIENT PERSONALITY An insecticide composition for controlling pests of the species Homopter and Thysanoptera, in particular aphids and thrips, comprising from 80 to 95% by weight of a mixture of 10 to 20 carbon atoms, 20 to 5% by weight of a surfactant and optionally a solvent.