标题：TOXICITY OF THREE CHEMICALS AND NEEM INSECTICIDE AGAINST SPRING POPULATIONS OF DUBAS BUG, OMMA T ISSUS LYBI C US DE BERGEVIN (TROPIDUCHIDUE: HOMOPTERA) IN OMAN
摘要：The date palm is the main host of dubas bug, which is also known as the palm bug. Dubas bug, Ommatissus /ybicus De Bergevin is a destructive pestin Gulf countries. The intensive use of insecti- cides i11 Oman to control the dubas bug might lead to resistance. An entomological field study was con- ducted to test pesticides against dubas bug insect on spring generation in A1-Batinah region in sultanate of Oman. Four pesticides were used: Decis, Oberon, Mospilan and Ecodaneem (which is neem extract) and the control was sprayed by water only. There were no significant differences forthe five used plots one day before spraying treatments. Insect densities of alive dubas nymphs after 10 days of the spraying treatments were decreased gradually in the treat- ments. At the present study. the pesticides treatments were carried in the first week of April which ex- plained the decreased populations of nymphs in all treatments including the control. However, the num- ber of alive nymphs in the Oberon treatment was the highest without significant difference with the con- trol treatment. In conclusion, the efficacy of the tested insecticides was Oberon, Ecodoneem, Mospi- lan and Decis, in a descending order.
