PL101630B1 - AN INSECTICIDE SPECIALLY AGAINST COLORADO POTATO BEETLE - Google Patents

Description

The subject of the invention is an insecticide whose active ingredients are a mixture of known ones insecticides.

O, O-dimethyl-O-l (2,4-dichlorophenyl) -2-bromovinyl phosphate shows much lower activity insecticidal activity against the Colorado potato beetle than typical insecticides from the group of organophosphorus compounds of the following: 0.0-diethyl-O-l (2,4-dichlorophenyl) -2-chlorovinyl phosphate (chlorphenvinphos) and phosphate 0.0-diethyl-O-l (2,4-dichlorophenyl) -2-bromovinyl (bromfenvinphos). Advantage of 0.0-Dimethyl-O- Phosphate 1 (2,4-dichlorophenyl) -2-bromovinyl is relatively low toxic to humans and animals higher, in contrast to the toxicity of chlorfenvinphos and bromfenvinphos. In the field, no 0.0-dimethyl-0-l (2,4-dichlorophenyl) -2-bromovine phosphate was found to have a negative effect on bees at the rate of 0.5 kg / ha of this substance. However, at higher doses, this substance can show a negative effect on bees, because according to the adopted classification, on the basis of laboratory tests it is one of the insecticides poisonous to bees.

It is known to use the hydrochloride of 1,3-di (carbamylthio) -2-N-dimethylaminoprop in plant protection. to you (kartap). It is a chemical compound of relatively low toxicity to humans and animals in heat-heat and bees. Kartap has a strong insecticidal effect, especially against the Colorado potato beetle, however, at higher doses (0.5-0.75 kg / ha). Preparations containing the carton are used in the form of granulated, dusting powder and water-soluble powder (trade name: Padan).

It has surprisingly been found that a mixture of 0,0-dimethyl-O-l (2,4-dichlorophenyl) -2-bromo phosphate of vinyl with 1,3-di (carbamylthio) -2-N-dimethylaminopropane hydrochloride shows a synergistic gical.

The essence of the invention consists in the use of a mixture in an insecticide as an active ingredient 0,0-dimethyl-O-l (2,4-dichlorophenyl) -2-bromovinyl phosphate with 1,3-di (carbam- lotio) -2-N-dimethylaminopropane in proportion to each part of the phosphate 0,0-dimethyl-0-l) 2,4-dibi ~ rophenyl) -2-bromovinyl 10-1000 parts of hydrochloride and 1,3- di (carbamylthio) -2-N- vumethylamino- propane. 2 101 630 The insecticide object of the present invention is used even in small amounts has a very effective effect on populations of both sensitive and DDT resistant insects. Center is characterized by low toxicity to humans and higher animals, does not accumulate in the environment and in tissues animals. As a result of the use of low doses, 0.0-dimethyl-O-l (2,4-dichlorophenyl) -2-bromo phosphate mvinyl, which is a component of the mixture, is safe for bees; at the same time the environment succumbs less schematic. Due to its properties, this measure can be used widely especially in the control of the Colorado potato beetle on potatoes.

The results of biological tests are presented in Tables I, II and III.

Table I, Insecticidal activity of the phosphate mixture 0,0-dimethyl-CM (2,4-dichlorophenyl) -2- bromovinyl and hydrochloride 1,3-two (carbamylthio) -2-N-dimethyl- aminopropane on the Colorado potato beetle Composition and mixture in percents cartap 0 27 50 70 83 100 phosphate as above 100 73 50 17 0 Dose (mcg / pc).

LD50 0.93 0.94 1.12 1.16 1.18 2.70 LD, 0 2.55 2.68 2.95 2.92 3.61 6.70 The research was carried out using the topical application method using the amount of the preparation solutions mci / Colorado potato beetle. LD50 and LD90 doses causing 50% and 90% mortality respectively The test insects were determined by the logarithmic-probit method from 5 applied concentrations.

Among the tested variants of the mixture, the highest synergism was shown by the preparation containing 83% of cartap and 17% phosphate, not significantly different in LD90 from the stonicidal effect of the variant of the mixture containing 70% cartap and 30% 0.0-dimethyl-O-l (2,4-dichlorophenyl) -2-bromovinyl phosphate.

Table II Test of the rate of insecticidal action on the Colorado potato beetle of the phosphate mixture 0.0-dimethyl-O-l (2,4-dichlorophenyl) -2-bromovinyl and 1,3-di (carbamyiotio) -2-N-dimethylaminopropane hydrochloride in the proportion of 30% + 70%, Test substance Kartap 0,0-dimethyl-phosphate 0-1 (2,4-dichlorophenes- lo) -2-bromovinyl Cartap 70% + phosphate as above thirty% The number of hours that have passed LT50 - the beginning actions , 3 6.7 3.9 LT50 -50% effectiveness 14.4 12.0 7.9 from surgery LT95 -95% effectiveness 40.0 , 0 16.0 Number of hours within which 90% died insects (LT9S-LT $) 34.7 18.3 12.1101 630 3 The research was carried out using the food contact test method, dispensing the solutions of the preparations at help POTTER's tower simultaneously on the potato plants and the Colorado potato beetles in the amount of 2 ml / 100 cm2. A concentration of 0.5% active ingredient was used. Observations of the insect mortality were made in intervals of 30 minutes until the occurrence of a mortality above 85% and then at greater intervals time. The mean times of extinction of 5%, 50% and 95% of the population were determined by the log-probit method.

Among the tested preparations, the highest speed of action was shown by a mixture of kartap and phosphate 0.0- dimethyl-O-l (2,4-dichlorophenyl) -2-bromovinyl.

Table III.

Study of food-contact effects phosphate mixtures 0,0-dimethyl-0-l (2,4-dichlorophenyl) -2- -bromovinyl and hydrochloride 1,3-two (carbamylthio) -2-N-dimethylamino- propane on the Colorado potato beetle Test substance Kartap Phosphate i.w.

Kartap + phosphate as above in the proportion of 7: 3 Average concentration (%) LC50 LC90 0.30 0.69 0.18 0.46 0.19 0.40 The research was carried out using the food contact test method, dispensing the solutions of the preparations at help POTTER's tower simultaneously on the potato plants and the Colorado potato beetles in the amount 2 ml / 100 cm2. 4 solution concentrations were used. Observations of the mortality of test insects were made in 15-minute intervals. Mean concentrations of LC50 and LC90 resulting in 50% and 90% mortality, respectively insects were determined by the log-probit method.

Mixture of 30% 0.0-dimethyl-O-l (2,4-dichlorophenyl) -2-bromovinyl phosphate and 70% 1,3-di (carbamylthio) -2-N-dimethylaminopropane hydrochloride has a synergistic effect nym.

The insecticide according to the invention ready for use is obtained in the usual way by mixing insecticides, which are 1,3-di (carbamylthio) -2-N-dimethylamino hydrochloride propane (kartap) and 0,0-dimethyl-O-l (2,4-dichlorophenyl) -2-bromovinyl phosphate, with auxiliary substances with the use of typical mixers and micronizers, such as stick or jet mills. As auxiliary substances are mineral carriers of organic origin, such as diatomite or inorganic materials active silicas such as natural silicas or synthetic silicas such as precipitated silica Arsil or silica lost in the production of superphosphate.

Anionactive substances such as lignin acid salts are used as surfactants. phonics (klutan), naphthalenesulfonic acid (Nekalin S) or methyl taurine (Sapogen T), non-ionic substances surfactants, for example, alkylphenols containing oxyethylene groups (Rokafenol N-8) or ethers polyglycol fatty alcohols (Igepal), as auxiliary substances are methylcellulose called Glycocel and organic acids such as acetic or lactic and inorganic acids such as phosphoric.

Example I. Precipitated silica in an amount of 28 parts by weight is mixed with a card in an amount of 31 parts by weight and 11 parts 0.0-dimethyl-0-l (2,4-dichlorophenyl) -2-bromovinyl phosphate by weight. 20 parts by weight of the diatomite, previously mixed with 2 parts by weight with alfanol N-8, 6 parts by weight with klutan. and Glycocelem in the amount of 2 parts by weight.

Everything is ground using a jet mill. The resulting insecticide is used as a powder for preparation of aqueous suspensions.

Example II. 37 parts by weight of natural silica is mixed with 1 part by weight of acid phosphorus, 3 parts Sapogen T, 3 parts Glikocel and 4 parts Klutan and 16 parts phosphate Q, O-dimethyl-0-1 (2,4-dichlorophenyl) -2-bromovinyl and 36 parts Kartap. Everything is mixed in in a ribbon mixer, and then micronized in a jet mill. Received insecticide it is ready to use as a wettable powder..4 101 630

Claims (1)

1. Patent claim An insecticide, in particular for the control of the Colorado potato beetle, containing an active ingredient and a solid or liquid carrier, characterized in that the active ingredient is 100 parts of 0,0-dimethyl-O-1 (2,4-dichlorophenyl) phosphate -2 -bromovinyl mixed with 10-1000 parts 1,3-di (carbamylthio) -2-N-dimethylaminopropane hydrochloride. Wash. Typographer. UP PRL, circulation 120 + 18 Price PLN 45