Effect of different pesticide application techniques on distribution, spray drift and lost on soil

Document Type : Original Article

Authors

1 Agricultural Machinery and Power Engineering Department, Faculty of Agricultural Engineering, Al-Azhar University, Cairo, Egypt.

2 Plant Protection Research Institute, Agricultural Research Center (ARC), Doki, Giza, Egypt.

Abstract

This research aims to evaluate the effect of different pesticide application techniques on vertical distribution of the droplets on the plant leaves eggplant plants, drift outside treatment and Lost spray on soil during spraying. The following are the techniques for applying the pesticides were used: Centrifugal Atomization Technique "CAT" (17.3 L/fed); Pressure or Hydraulic Atomization Technique "PHAT" (129.8 L/fed); Air Atomization Technique "AAT" (46.7 L/fed) and integrating Hydraulic with Air Atomization Technique "HAAT" (43.3 L/fed) with variable spraying rates, and with the use of two pesticides (Buprofezin and Fenpyroximate) for control pest spider mite Tetranychus urticate koch on Eggplant leaves. The results showed that the highest spray spectrum de-posit value on the lower surface of plant leaves ranged between 26 to 44 and 30 to 44 droplets/cm² and 63 to 95 and 72 to 95 μm for HAAT while, the lowest spray spectrum deposit value was on the lower surface of plant leaves ranged between 19 to 24 and 14 to 35 droplets/cm² and 100 to 103 and 93 to 103 μm for PHAT for each Buprofezin and Fenpyroximate respectively. Also, the spraying with CAT gave less drift spray value outside treatment and lost spray on soil if compared with techniques used.

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