Method of protecting crops against harmful insects

FIELD: plant protection.

SUBSTANCE: method is characterized by that grain-crops in vegetation phase are treated with mixture of methylheptenone with Deciss taken at volume ratio (1-5):1.

EFFECT: reduced toxic pesticide loading on plants in vegetation phase.

1 tbl

 

The invention relates to the technology of protection of agricultural crops from harmful insects.

Known way to protect crops from harmful insects, capable of handling vegetative plants drug Decis (List of pesticides and agrochemicals permitted for use on the territory of the Russian Federation 2002. Supplement to the journal "Protection and quarantine of plants", 2002, №6, ñ.38-42).

The technical result of the invention is to reduce toxic pesticide load on the plant.

This result is achieved by the fact that the way to protect crops from harmful insects according to the invention is characterized by the fact that vegetative plants treated with a mixture methylheptenone and Decis taken in the ratio by volume (1-5):1.

The method is implemented as follows.

Known drug Decis mixed with methylheptenone in the ratio by volume of 1:(1-5). Recommended consumption for drug Decis 300 ml/ha

Methylheptane (2 methylheptan-2-he-6) found in some vegetable oils and can be isolated from them by the known methods, for example by chromatographic purification. Information about using methylheptenone in plant protection in the prior art are absent.

To protect crops from harmful insects vegetative plants in the period m is sovago output of harmful insects treated with a mixture of Decis with methylheptenone, for example, by spraying.

To confirm the declared technical result was experimental verification. Because the natural population of harmful insects proved negligible in experiments on plots with grain crops artificially evenly populated with larvae of bedbug harmful bug 2 and 3 ages. Processing of crops carried out by spray using ground equipment. The results of the experiments are summarized in table.

Table
MedicationThe number of larval specimens/m2Biological efficiency, %, through the night
 before processingafter processing through the night 
  1371013710
Decis, 300 ml/ha19,03,72,01,3073,086,790,7100
Decis, 100 ml/ha16,95,54,02,00,3 55,766,783,697,9
methylheptenone, 500 ml/ha17,25,02,21,41,259,782,288,9to 92.1
methylheptenone, 100 ml/ha13,35,54,02,51,342,758,374,289,0
Methylheptenone + Decis, 500+100 ml/ha14,70,90,200to 91.697,5100100
Methylheptenone + Decis, 100+100 ml/ha17,21,70,50,5086,396,096,0100

As can be seen from the table, in the specified proportions methylheptenone and Decis have a synergy, and toxic pesticide load on agricultural crops can be reduced in 3 times without compromising the effectiveness of the destruction of harmful insects, whose adaptation to the drug Decis or methylheptenone excluded due to their complete destruction during processing.

The way to protect crops from harmful insects characterized by the fact that vegetative RA who plants crops treated with a mixture methylheptenone and Decis, taken in the ratio by volume (1-5):1.



 

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