Abstract
Effects of basil, geranium, chinaberry, onion and garlic aqueous extracts against the tomato leaf miner, Tuta absoluta Meyrick (Lepidoptera: Gelechiidae) and the cotton aphid, Aphis gossypii (Glover) (Hemiptera: Aphididae) under laboratory and greenhouse conditions were evaluated. In the laboratory, chinaberry, geranium, onion and garlic showed highest effects on T absoluta 2nd instar larvae. While, basil leaves extract exhibited the least effect. In greenhouse, chinaberry exhibited the highest effect on T. absoluta population, while geranium and coragen (R) insecticides ranked second. Onion showed the lowest effect on T. absoluta population. For A. gossypii, chinaberry and geranium gave highest mortality percentages in laboratory. Basil leaves exhibited the lowest effect while onion and garlic had a moderate result. In greenhouse, reduction percentages of A. gossypii population were highest using geranium, chinaberry, basil, onion and garlic, respectively. Washing the treated tomato fruits by water reduced the toxic effects using T. absoluta larvae as a bio-instrument.