When droplet spectra and patterns of distribution of deposits of a hexylene glycol-acetone formulation of monocrotophos applied as ultra-low-volume (<1/2 gal/ acre) and an acetone formulation of monocrotophos applied as low-volume (>1/2 but <10 gal/acre) sprays with ground equipment were determined by chemical and colorimetric analyses, the ULV spray was found to deposit more droplets and more actual monocrotophos on the protective clothing of the sprayer operator. In contrast, the 2 methods apparently delivered about equal amounts to the target area. However. more extensive colorimetric analyses showed that the ULV spray deposited more actual monocrotophos on the target area. When ULV and LV sprays were applied by fixed-wing aircraft. the ULV spray deposited more monocrotophos on the target area; the LV spray consistently delivered more monocrotophos 330-2610 ft downwind from the target area.
Document Type: Research Article
Publication date: February 1, 1971
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