Biological effectiveness of electrostatically charged rotary atomisers. III. Trials on arable crops other than cereals, 1982.
The effectiveness of electrostatically charged rotary atomizers with different crop-pest combinations was determined in field-plot tests in the United Kingdom in 1982. When compared with conventional hydraulic sprays, electrostatically applied sprays deposited much more chemical on potato, field bean (Vicia faba), oilseed rape and pea, and gave better control of Sitona lineatus on field bean and Cydia nigricana on pea (both with permethrin at 25 or 50 g a.i./ha) and of fungal diseases attacking oilseed rape. However, on swede, sugarbeet and brussels sprouts, deposits of pesticide were increased only on some parts of the plant. The control of mildew (Erysiphe cruciferarum on swede and E. betae on sugarbeet) and larvae of Pieris spp. living within the central whorl of leaves on brussels sprouts was not as great as when a high-volume hydraulic sprayer was used.<new para>ADDITIONAL ABSTRACT:<new para>Compared with conventional hydraulic sprays electrostatically applied sprays deposited much more chemical on potatoes, field beans, oilseed rape and peas and gave better control inter alia of fungal diseases of oilseed rape. However on swedes, sugar beet and Brussels sprouts deposits of pesticide were increased only on some parts of the plant. The control of Erysiphe cruciferarum on swede and E. betae on sugar beet was not as great as when a high-vol. hydraulic sprayer was used.