Potential of Certain Insecticides in Controlling the Leaf Miner, Liriomyza trifolii Which Attacks Faba bean and Fenugreek and Its Effect on Some Predators

During 2021 and 2022 growing seasons, two field experiments were carried out to compare the effectiveness of conventional and non-conventional pesticides, against the leaf miner, Liriomyza trifolii (Burgess) and its parasitoids on faba bean and fenugreek plants. Ten treatments divided into three groups were evaluated: malathion, aviesect, and carbosulfan in the first group; Naterlo mixed with each of the previous chemical insecticides in the second group; and Naterlo, Agri-flex, Chemisol, and Biofly in the third group. The findings revealed that Naterlo+Aviesect considerably reduced leaf miner larvae population by up to 73% (mortality rate), followed by Naterlo+Malathion 71%. The remaining treatments aviesect and malathion resulted in 65%and 63% mortality, respectively. On the other hand, insect pest population densities were significantly reduced after the addition of the biocides Biofly and Naterlo to the chemical insecticides. The use of natural products is a promising approach as they are less harmful to natural enemies and reduce the danger of contaminated food. Keywords: Leaf miner, faba bean, fenugreek, natural enemies.