The biological activities of neem (Azadirachta indica A.Juss.) products Neemazal and Neemol were evaluated on the field against Karate on insect pests of aubergine (Solanum melongena L.). The study was carried out at the University of Ghana Agriculture Farm, Legon, during the minor growing season between July 2002 and February 2003.The most abundant insect pests identified were Zonocerus variegatus, Thrips palmi, Bemisia tabaci, Empoasca lybicus, Scrobipalpa blapsigona and Selepa docilis. Neemazal provided the greatest protection and significantly controlled activities of insect pests at all levels of dosages applied: 2ml/l, 4ml/l (recommended rate), and 6ml/l. Percentage leaf damage in Neemazal, Neemol, Karate and Control was 0-5%, 5-10%, 0-5% and 36-40% respectively. Crop yield in Neemazal, Neemol, Karate and Control treatments was 38.11, 30.25, 27.78 and 23.92 tonnes/ha. Neemazal and Neemol had no detrimental effect on beneficial arthropods such as spiders, Mantis mantis, Crematogaster sp., Componotus sp. and pollinator populations observed on the field.
Species 1: Homoptera Aleyrodidae Bemisia tabaci (sweetpotato whitefly)
Species 2: Lepidoptera Noctuidae Selepa docilis
Species 3: Thysanoptera Thripidae Thrips palmi
Keywords: neem, beneficial arthropods
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