RO120744B1 - Synergistic insecticidal-acaricidal compositions - Google Patents

Abstract

The invention relates to synergistic insecticidal-acaricidal compositions based on 2-tert-butylimino-3 isopropyl-5- phenyl-1,3,5-thiadiazin-4-one (buprofezin) as component A and mineral oil as component B, meant for the control of Quadraspidiotus perniciosus and Panonichus ulmi in fruit tree orchards, and comprising 1...10% component A, 35...70% component B, 8...15% surfactants, 0...20% cosolvents and solvent for the remainder to 100%, the percentage being expressed by weight.

Description

The present invention relates to insect-synergetic acaricidal compositions, intended for use in agriculture for the purpose of pest control Quadraspidiotus perniciosus and Panonychus ulmi from fruit trees orchards.

Numerous compositions are known for combating pests from fruit tree crops, with buprofezin or mineral oil as an active substance, in addition to one or more active substances with insecticidal or fungicidal action.

Thus, compositions consisting of 90 ... 92% mineral oil, 8 ... 10% emulsifiers are known. These compositions, formulated in the form of emulsifiable concentrates, are used in combating pests of fruit trees, but they have a low biological efficiency and can only be used in winter treatments [Perju T., Agricultural Entomology, component of integrated production of agrosystems, pag. 158-159; Ghizdaru I., Agricultural Entomology, pp. 372-373; Șuta V et al., Protection of fruit trees and shrubs; Șuta V., Instructions for the use of pesticides in agriculture, Lefter Gh., Etc., Diseases and pests of fruit seedling species).

Also known are compositions consisting of 0.1 - 90% buprofezin, and conditioning ingredients corresponding to formulations in the form of emulsifiable concentrates or wettable powders. These compositions are intended to combat pests of the classes: Hemiptera, Coleoptera, Diptera, Lepidoptera and Orthoptera, which do not have importance in plant protection under the conditions existing in Romania and have the disadvantage of a reduced biological efficiency, in climatic conditions with high temperatures, due to the evaporivin buprofezin. 4159328).

Also known are compositions consisting of quinalphos, thiomethone and the corresponding conditioning ingredients, compositions that have the disadvantage of a significant negative impact on the environment, due to the organophosphorus component (US 4510137).

Synergetic combinations containing as active substances buprofezin and insecticides with antifungal qualities (US 5885598) are also known. These compositions have the disadvantage of a narrower field of biological action.

Mixtures containing an active ingredient pyrethroid are disclosed in UK Patent 2126208. It is mixed with mineral oil in toluene, in well-established reports. The mixture itself is used in agriculture to control unwanted insects. Pyrethroid mixtures have the disadvantage of low efficacy, because insects have developed adaptive systems and increased their resistance to treatment.

These compositions in the form of emulsifiable concentrates or wettable powders have the disadvantage of relatively high consumption of active substance, in the case of vegetation treatments, the use for a reduced spectrum of pests and a strong polluting effect when applying the treatments.

The technical problem that the invention solves is to establish synergetic insect-acaricidal compositions, with increased biological activity in both winter treatments and those applied in vegetation, during the hot summer periods, ensuring a reduced impact on the environment. , by reducing application doses in pest control San Jose lice (Quadraspidiotus perniciosus) and Panonychus ulmi winter eggs from orchards.

The insect-acaricidal compositions according to the invention eliminate the disadvantages of being composed of 1 ... 10% 2-tert-butylimino-3-isopropyl-5-phenyl-1,3,5-thiadiazine 4-one (buprofezin) component A, 35 ... 70% mineral oil component B; 8 ... 15% tenside; 0 ... 20% co-solvents and the rest up to 100% solvent, the percentages being expressed by weight and are intended to combat pests of San Jose lice (Quadraspidiotusperniciosus) and winter eggs of Panonychus ulmi.

RO 120744 Β1

The compositions according to the invention have the following advantages: 1

- carrying out winter treatments for fruit tree crops with 15% higher yields than usual treatments; 3

- offers the possibility of replacing the very toxic organophosphorus products used in the usual treatments of the trees, with ecological compositions;

- Increases the range of pesticide products used to fight the San Parrot

Jose (Quadraspidiotusperniciosus) in vegetation treatments in fruit tree cultivation; 7

- it reduces the phenomenon of evaporation of buprofezin by forming a protective film on the leaves of the trees, thus increasing the biological efficiency;

- decrease of the dose of pesticide per hectare, which implies a reduction in the degree of pollution in the orchards, compared to the usual treatments.11

- they are easy to make technologically.

The active substances used in insect-acaricidal compositions are: 13

2-tert-butylimino-3-isopropyl-5-phenyl-1,3,5-thiadiazine-4-one (buprofezin) of the chemical formula: 15

NC (CH3) 3 17

Component A21

- mineral oil obtained from fractions of oil from selected crude oils and characterized by kinematic viscosity (at 50 ° C) in the range 10-14 cSt and structural analysis: aromatic carbon: maximum 20%; 40% naphthenic carbon; paraffinic carbon min.

40% .25

Component B

As conditioning ingredients the following are used: 27

- tensides with the role of emulsifying agents, preferably chosen from polyethoxylated nonyl phenols EO = 4.6, 8.10; ethoxylated fatty acids EO = 20, 36; calcium sulfonate dodecylbenzene. 29

- co-solvents preferably selected from isobutanol and cyclohexane;

- solvent preferably selected from xylene and aromatic solvent C9; 31 below are 3 examples of making compositions according to the invention.

Example 1. A composition is made by mixing the following components: 33

1 .. .1.5 g buprofezin, 65 ... 70 g mineral oil, 3 ... 5 g nonylphenol ethoxylate EO = 6, 1 ... 3 g castor oil ethoxylate EO = 20, 1 ... 3 g dodecylbenzene calcium sulphonate, up to 100 g xylene.35

Example 2. A composition is made by mixing the following components:

5 .. .7 g buprofezin, 45 .... 55 g mineral oil, 5 ... 7 g nonylphenol ethoxylate EO = 6.0.5 ... 2 g nonylphenol37 ethoxylate EO = 10.3 ... 5 g ethoxylated castor oil EO = 36, 0.5 ... 3 g calcium dodecylbenzene sulphonate, 15 ... 20 g cyclohexanonone, up to 100 g xylene.39

Example 3. A composition is made by mixing the following components:

8 .. .10 g buprofezin, 35 ... 40 g mineral oil, 3 ... 5 g nonylphenol ethoxylate EO = 10, 1 ... 5 g oil of 41 castor ethoxylate EO = 36.2 ... 5 g calcium dodecylbenzene sulphonate, 10-15 g isobutanol, up to

100 g aromatic solvent C9.43

The compositions of Examples 1,2, 3, are prepared by dissolving in the solvent and cosolvent the tensides and buprofezin under stirring, then the mineral oil is added and homogenized 45 at 40 ° C. The compositions thus prepared are cooled and filtered.

The compositions of examples 1 -3 were biologically tested in different pedoclimatic zones, 47 according to the experimental technique, and the results are presented in tables 1-8, differentiated by crops and pests. 49

RO 120744 Β1

The composition of example 1 was tested in three localities with different ecological conditions and compared, in terms of biological efficiency, with the composition consisting of 12% malation and 40% mineral oil (Standard 1). The treatments were performed at the end of winter, at the beginning of the tree weeding, when the sensitivity of the pests of San Jose (Quadraspidiotus pemiciosus) and the red mite of the trees (Panonychus ulmi) is maximum. Observations were made about 20-25 days after treatment, establishing% of dead individuals, and subsequently, according to the Schnaider - Orelli formula, the biological efficacy of the composition was calculated.

Table 1

Biological efficacy of the compositions according to example 1 in combating the winter larvae of the lice from San Jose, in apple orchards

Alternative Dose % Pitesti Mărăcineni Bistrita Satu Mare Mortalii. % Effectiveness. % Mortalii % Effectiveness. % Mortalii % Effectiveness. % Comp. Ex.1 1.5 96.8 94.8 93.1 92.6 94.6 92.5 Standard 1 2.0 94.1 92.4 92.2 91.2 93.6 91.4 Untreated witness - 22 - 9 - 16 -

Solution volume used: 1500 l / ha

Table 2

Biological efficacy of the compositions according to example 1 in combating the winter larvae of the louse in San Jose, in the orchards

Alternative Dose % Pitesti Mărăcineni Bistrita Satu Mare death rate % Effectiveness. % Mortality. % Effectiveness. % Mortality. % Effectiveness. % Comp. Ex.1 1.5 97.2 95.6 95.1 94.5 95.2 93.8 Standard 1 2.0 96.4 91.8 89.2 89.0 93.9 92.1 Untreated witness - 26.9 - 7.0 - 17.9 -

Solution volume used: 1000 l / ha

Table 3

Biological efficacy of compositions according to example 1 in combating eggs of Panonychus ulmi, in apple orchards

Alternative Dose % Pitesti Mărăcineni Bistrita Satu Mare death rate % Effectiveness. % Mortality. % Effectiveness. % Mortality. % Effectiveness. % Comp. Ex.1 1.5 93.6 91.7 91.7 90.2 94.1 92.5 Standard 1 2.0 88.8 86.2 90.5 89.6 91.3 90 Untreated witness - 20.6 - 8.9 - 17.6 -

Solution volume used: 1500 l / ha

RO 120744 Β1

Table 4

Biological efficacy of compositions according to example 1 in combating eggs of Panonychus ulmi, in hair orchards

Alternative Dose % Pitesti Mărăcineni Bistrita Satu Mare Mortals% Effectiveness. % Mortality. % Effectiveness. % Mortality. % Effectiveness. % Comp. Ex.1 1.5 95.1 93.7 92.5 91.3 95.2 93.9 Standard 1 2.0 90.2 89.0 90.0 89.1 93.7 91.4 Untreated witness - 12.6 - 7.7 - 21.9 -

Solution volume used: 1000 l / ha

The results presented in tables 1-4 demonstrate a higher biological efficiency for the composition according to example 1, compared to the standard used.

The compositions according to examples 2 and 3 were tested in two localities with different ecological conditions and were compared in terms of biological efficiency with the compound: 25% fossil (Standard 2).

The treatments performed for the first summer generation of the louse of San Jose {Quadraspidiotus pemiciosus) consisted of performing two splashes within 10 days of each other. Observations were made about 20 days after the last spray, with the mortality of individuals being recorded, and subsequently, according to the Schnaider-Orelli formula, the biological efficacies of the compositions according to examples 2 and 3 were calculated.

Table 5

The biological efficacies of the compositions according to example 2 and 3, in combating the first summer generation (G1) of the San Jose louse, in apple orchards

Alternative Dose % Pitesti Mărăcineni Satu Mare Mortality. % Effectiveness. Mortality. % Effectiveness. Comp. Ex. 2 0.4 95.4 95.0 97.2 96.1 Comp. Ex. 3 0.3 95.1 94.7 96.5 96.5 Standard 2 0.3 92.6 91 94 92.9 Untreated witness - 8.3 - 2.9 -

Solution volume used: 1500 l / ha

Table 6

Biological efficacies of the compositions according to example 2 and 3 in combating the first summer generation (G1) of the San Jose louse, in the orchards

Alternative Dose % Pitesti Mărăcineni Satu Mare Mortality. % Effectiveness. % Mortality. % Effectiveness. % Comp. Ex. 2 0.4 94.7 94.0 98.9 98.1 Comp. Ex. 3 0.3 95.0 94.2 97.9 96.8 Standard 2 0.3 91 89.6 96.5 94.8 Untreated witness - 9.7 - 1.2 -

Solution volume used: 1000 l / ha

RO 120744 Β1

The second generation of the pest appeared in the second part of the vegetation, namely the end of August and the beginning of September, the treatments being carried out by two splashes within 10 days of each other. Observations were made about 20 days after the last spray, the mortality of individuals was recorded, and subsequently the biological efficacies of the compositions according to examples 2 and 3 were calculated according to the Schnaider - Orelli formula.

Table 7

The biological efficacies of the compositions according to example 2 and 3 in combating the second summer generation (G2) of the San Jose louse, in the apple orchards

Alternative Dose % Pitesti Mărăcineni Satu Mare Mortals% Effectiveness. % Mortals% Effectiveness. % Comp. Ex. 2 0.4 97.1 96.0 97.9 97.3 Comp. Ex. 3 0.3 96.5 95.3 97.1 96.0 Standard 2 0.3 95.3 93.8 94.1 92.7 Untreated witness - 7.6 - 1.6 -

Solution volume used: 1500 l / ha

Table 8

The biological efficacies of the compositions according to example 2 and 3 in combating the second summer generation (G2) of the San Jose louse, in the orchards

Alternative Dose % Pitesti Mărăcineni Satu Mare Mortals% Effectiveness. Mortalii. % Effectiveness. Comp. Ex. 2 0.4 98.8 97.0 99.2 99.0 Comp. Ex. 3 0.3 97.8 96.6 98.7 97.3 Standard 2 0.3 94.9 93.2 95.0 93.9 Untreated witness - 8.2 - 1.1 -

Solution volume used: 1000 l / ha

The results presented in tables 5-8 demonstrate superior biological efficacies for the compositions according to examples 2 and 3 in combating the summer generations of the San Jose louse compared to the standard used.

There were no phytotoxicity phenomena affecting the cultures in which the experiments were carried out.

Claims (5)

1. Synergetic insect-acaricidal compositions characterized in that they consist of 1 ... 10% 2-tert-butylimino-3-isopropyl-5-phenyl-1,3,5-thiadiazine-4-one component A, 35 ... 70% mineral oil component B; 8 ... 15% tenside; 0 ... 20% cosolvents and the rest up to 100% solvent, the percentages being expressed by weight and are intended to combat pests of San Jose lice - Quadraspidiotus pemiciosus - and winter eggs of Panonychus ulmi. RO 120744 Β1 2. Compositions according to claim 1, characterized in that the mineral oil is 1 obtained from oil fractions from oil selected with kinematic viscosity, at 50'C, in the range 10-14 cSt and structural analysis: aromatic carbon: maximum 20% 3 carbon naphthenic max. 40%; 40% paraffinic carbon. 3. Compositions according to claim 1, characterized in that the surfactants are 5 selected from: polyethoxylated nonyl phenols EO = 4,6,8,10; ethoxylated fatty acids EO = 20, 36; calcium dodecylbenzene sulphonate.7 4. Compositions according to claim 1, characterized in that the cosolvents are selected from isobutanol and cyclohexane. 5. Compositions according to claim 1, characterized in that the solvent is preferably selected from xylene and aromatic solvent C9.11