Evaluating few botanical and synthetic pesticides in control of Tetranychus urticae and their side effects on Phytoseiulus persimilis during spring and summer seasons in greenhouse cucumber

Tetranychus urticae is the most important greenhouse cucumber pests in Iran. The higher amount and number of pesticides use on this mite pests in greenhouse cucumber during March until July–August in Iran. Effectiveness of two new botanical pesticides doses, Bio–2 and Mariapro–M were investigated against Tetranychus urticae on cucumber plant under greenhouse condition in Tehran, Oromieh, Mashhad, Jiroft during spring and summer seasons of 2022. Effects of new botanical pesticides doses were compared with 1ml/l Pest–out ®, 1.25ml/l Acequinocyl 15% SC, 0.5 ml/l of Cyflumetofen 20% SC, Bifenazate 24% SC, 0.75ml/l Golden abamectin 10 SC and water sprayed in controlled treatment. Complete randomize design with three replications were used. On each cucumber plant 25 Phytoseiulus persimilis mites released two weeks before spraying treatments in Tehran. Treatments done according random 100 leaves collected at weekly interval until at least 5 active spider mite stages recorded. Each treatment effects on spider mite stages followed by random 30 leaves collected from lower and middle cucumber plant parts at interval of one day before and 3, 7 and 15 days after. Collected data converted into mortality % by Abbott formula and statistical analysis done by SAS software. Higher spider mite mean mortality% recorded for both 1.5ml/l Bio–2 and 2ml/l of Mariapro–M up to 90% at Tehran where spider mite found under lower influences of pesticides. Spider mite mortality% with both new botanical pesticides reduced more as compared with synthetic acaricides from 3rd to 15th day on wards. Effects of all treatments reduced predatory mite population on 3rd day sampling as compared one day before, but predatory mite activities and its distribution increased on cucumber leaves from 7 days onward on all treatments. Effects of all treatments revealed that, they can apply with predatory mite under for integrating spider mite management in greenhouse cucumber cultivation.