Chrysoperla carnea ( Neuroptera :Chrysopidae) and biocides: Efficacious tools in controlling certain sugar beet insects

Abstract

During two successive sugar beet growing seasons; 2021/2022 and 2022 / 2023. This field study was carried out at the Experimental
Farm of Sakha Agricultural Research Station for recording the various prey of Chrysoperla carnea (Stephens) (Neuroptera :Chrysopidae)
larvae predator by visual examination method, this predator feed upon their prey in the field. Moreover, investigated the toxicity of
conventional, Clozemail, and biocides Xentari® insecticides on Spodoptera spp. (Noctuidae :Lepidoptera) and C. carnea larvae. The
obtained results proved that the total numbers of prey were 197 and 196 individuals in two seasons, respectively. The most common prey was Spodoptera spp. (Eggs + larvae), leafhoppers, aphids, Pegomyia mixta Vill. (Diptera: Anthomyiidae) larvae, and Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) throughout the two seasons. In addition, the general meaning of reductions to Spodoptera spp. Larvae population due to Clozemail® and Pleo® was (82.17 and 84.11%) and (83.33 and 89.9%) during the two seasons, respectively. While Xentari® caused (77.36 and 77.65%) in two seasons, respectively. On the other hand, the general mean reduction in C. carnea larvae numbers was (83.33 and 89.90%) for Clozemail®, and (92.32 and 89.95/) for Pleo® in two seasons, respectively. Regarding the biocide, Xentari® induced reductions to the same predators with (26.85 and 22.85%) in two seasons, respectively. In conclusion, the combination and integration between C. carnea predator and biocides application are very good tools in IPM of sugar beet insects.