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VCRB :: Contents of Volume 52/2000 :: Detailed information


THE EFFECTIVENESS OF NEW FORMULATIONS OF DIAZINON: BASUDIN 600 EW AND DIAZOL 50 EW IN THE CONTROL OF LARGE WHITE BUTTERFLY (PIERIS BRASSICAE L.)

Jan NARKIEWICZ-JODKO and Maria ROGOWSKA
Research Institute of Vegetable Crops, ul. Konstytucji 3 Maja 1/3, 96-100 Skiemiewice, Poland


Summary

Field experiments were carried out at the Research Institute of Vegetable Crops in Skiemiewice to control the large white butterfly (Pieris brassicae L.) on white head cabbage by applying the new formulation of insecticides, based on diazinon; Basudin 600 EW and Diazol 50 EW. Both insecticides included in the experiment are based on a new less environmently harmful formulation. The Basudin 600 EW was applied at the rates of 0,35 1/ha and Diazol 50 EW 0,45 1/ha, Basudin 25 EC applied at the rate of 0,9 1/ha was used as the standard treatment. Sprays were applied from a knapsack sprayer at the rate of about 600 litres of solution per hectare. To determine the efficiency of examined insecticides the number of living caterpillars was recorded on 5 plants on each plot before and at different times after the various treatments were applied. The control efficiency of both tested insecticides: Basudin 600 EW and Diazol 50 EW was at least as effective as Basudin's 25 EC, based on an old formulation with an organic solvent. On the basis of these experiments it can be concluded that the more harmful EC formulation of registered insecticides should be replaced by new EW formulation, the less harmful to the environment.

keywords:large white butterfly

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