[Insecticides efficiency in control with rape curculio on summer rape]
2007
Gurikova, E.I. | Saskevich, P.A., Belarus State Academy of Agriculture, Gorki (Belarus)
Rape curculio - the pest everywhere extended in Belarus in summer and winter rape agrocnosises. Research were spent with variety Yavar of summer rape. The agricultural technician of cultivation is standard for the republic northeast. Agrochemical indicators of soil: pHKCl - 6,2, the humus content 1,6%, mobile forms of phosphorus 205 and potassium 167 mg/kg of soil. Entering of mineral fertilizers - N120P90K90. The area of the trial plot is 25 square m, frequency – quadruple. Norm of the expense of a working liquid is 200 l/ha. The economic analysis spent by comparison of cost of additional production to additional expenses. Results of economic efficiency have shown, that insecticides application against rape curculio has appeared highly effective action and allows to receive about 1 ha $ 76,47-158,33 of the net profit and provides profitability at level of 306,3-350,4%. The highest indicators have been received in variants with use Mospilan with norms of the expense of 0,05-0,07 kg/ha. Thus, insecticides application constrains number of rape curculio in summer rape crops. The greatest efficiency for 3rd and 7th days after carrying out insecticidal processings possesses Mospilan with norms of the expense of 0,05-0,07 kg/ha. Next on 14th and 21st day the best protective action is noted at application of Fastak, 0,15 l/ha twice and Mospilan with norm of the expense of 0,07 kg/ha. Therefore, depending on experience variants, carrying out of protective actions allows to receive increases of seed productivity on the average for three years at level of 5,1-10,5 c/ha that makes 28,7 58,4%. Thus insecticides application gives possibility to receive $ 3,06-3,50 of profit on 1 s.u. of expenses
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