The risk of insecticide spray liquid application delay
2009
Vukovic, S., Faculty of Agriculture, Novi Sad (Serbia) | Indjic, D., Faculty of Agriculture, Novi Sad (Serbia) | Roncevic, S., Faculty of Science, Novi Sad (Serbia) | Sunjka, D., Faculty of Agriculture, Novi Sad (Serbia) | Grahovac, M., Faculty of Agriculture, Novi Sad (Serbia) | Bursic, V., Faculty of Agriculture, Novi Sad (Serbia)
The subject of the research is the determination of biological efficacy of insecticide (thiametoxam, cypermethrin) depending on water quality (hardness 4.5 and 32.6 do; pH 5.6-8.9) and storage duration (0, 24, and 72 h) of spray liquids (sl). The thiametoxam efficacy just after preparation is almost 100%, and with the storage of sl (for 24h and 72h) it is 92-100% in all kinds of water. Immediately after preparation, the sl of cypermethrin showed efficacy of 33-85%, and in the alkaline-hard water it is on significantly lower level than in a different kind of water. With 24h storage of cypermethrin, the efficacy in all kinds of water is drastically reduced (4-58%) in comparison with the readily applied sl.
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