Comparative efficiency of two methods used for sampling antestiopsis species (hemiptera: pentatomidae) in Arabica coffee in Uganda

Publication Type

Journal Article

Journal Name

Tropical Pest Management

Publication Date

1-1-1989

Abstract

Application of electrostatically charged sprays of Bacillus thuringiensis using MicronRMicro‐ulva chargeable spinning disc sprayer was investigated and its efficiency in improving underleaf surface coverage with charged droplets was determined by comparing the total viable spores counts (VSC) from spores washed off the upper and lower leaf surfaces of sprayed Brussels sprouts. Bioassay experiments were also carried out by comparing mortality of third instar larvae of P. xylostella confined to upper and lower leaf surfaces of plants sprayed with charged and uncharged droplets. Higher total viable spore counts (P < 0.001) and a higher mortality ofP. xylostella (P = 0.029) indicated improved coverage of the lower surfaces of electrostatically sprayed Brussels sprouts plants. © 1989 Taylor and Francis Ltd.

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