EVALUATION OF NEW SYNTHETIC INSECTICIDES AGAINST AFRICAN BOLLWORM, Helicoverpa armigera (HUBNER)....

Chickpea (Cicer arietinum L.) is one of the most important pulse crops for human consumption. In Ethiopia, the African bollworm, Helicoverpa armigera (Hub.) (Lepidoptera: Noctuidae), is one of the most common insect pests infecting chickpea crops. The laboratory experiment was conducted at Ambo University's Guder Mamo mezemir Campus to evaluate the efficacy of new insecticides, and the field experiment was conducted at Amaro kebele, Ambo District, West Shoa zone of Ethiopia's Oromia Regional State during the main cropping seasons in 2020/2021. The treatment contained three replicates, and the entire setup was set up in a randomised complete block design (RCBD) in the field and a randomised complete block design (CRD) in the lab. The percent mortality of larva was achieved with shark 2.5 percent EC, Vayego SC 200, Benezer plus 38.5 percent EC, Focus 5 percent EC, and Belt SC480 (96.67, 100.0, 100.0, and 100.0 percent, respectively), according to the laboratory study. In the field, the lowest and highest mortality percentages were recorded in three round spray caused mean percent mortality belt SC 480 (63.71-100.0 percent), followed by Benezer plus 38.5 percent EC (53.86 -100.00 percent), Focus 5 percent EC (57.08-95.28 percent), Shark 2.5 percent EC (55.50-100.0 percent), and Vayego SC 200 (63.71-100.0 percent) (44.97-100 percent ). In comparison to the control plot (9.00%), the treated plot with Belt SC480 had the least pod damage (0.44 percent). The highest yield (2.89 Ton/ha) was also obtained from the Belt SC480 treated plot, while the lowest yield (1.78 Ton/ha) was obtained from the control plot. If the land was not treated with synthetic pesticides, yield losses ranged from 1.92 to 38.46 percent. More research should be done to see how effective these chemical insecticides are in different Ethiopian ecosystems and how they can be incorporated into the integrated management of H. armigera.

Please see the link :- https://www.ikprress.org/index.php/JOGAE/article/view/7341