Abstract
The study used some biological control components and evaluated them against the two-spotted mite Tetranychius urticae Koch. on eggplant and pepper crops in the spring season in Salah al-Din Government, Iraq. The laboratory study included a compatibility study between the biopesticide Vertimec and the two fungi Metarhizium and Beauveria, as well as alcoholic and aqueous oleander leaf extracts. The results were positive and caused an increase in the colony area of the two fungi at concentrations below the recommended levels; the Beauveria fungus is activated by the aqueous extract of the oleander plant at a rate of 0.5 ml/l. The colony area was 29.5 cm2, while the colony area for comparison was 24.64 cm2. The sub-mixtures recommended from the compatibility results were adopted to combat eggplant and pepper fields infected with economically essential pests. The compatibility between the biopesticide Vertimec and two biopesticides, Metarism and Beauveria, showed the highest killing value, as it gave the eggplant plants treated with (Metarism+Vertimec pesticide) at a concentration of 1 ml/1 ml for the two periods after one and three days. Tthe highest corrected percentage for killing, it reached (92.33 and, 96.77) mites. As for pepper plants, the combination between (Metarrhizm+Vertemic pesticide) succeeded in sub-lethal rates (ml/1 ml/liter), which after three days were subjected to the highest kill rates of (100) % of mites. The study's findings are an effective way to combat this pest and the field of integrated management to combat it and implement sustainable agriculture using environmentally friendly pesticides.
