Destructive effects of conventional insecticides on environment have created\na necessity to introduce bio-rational products in pest control programs. Effectiveness\nof bio-pesticide (Beauvaria bassiana ), natural oil (anti-insect), a\nbotanical extract (nimbecidine) and malathion insecticide was evaluated\nagainst Thrips spp. and Bemisia tabaci attacking tomato in Kafr El Sheik,\nEgypt. The trial was conducted during two successive seasons; 2017-18 in a\ntotal area of 4912 m2 cultivated with tomato cultivar zero 42. The experiment\nwas set up in a randomized complete block design with five replications for\neach treatment. Yellow sticky traps were used to monitor population of both\npests before and after spraying, in addition, their numbers on plants were\ncounted. Results revealed that highest control rates of both pests were recorded\nafter the fourth day of each spraying. Long inter-applications periods\ndecreased effectiveness and the greatest control resulted when three consecutive\nsprayings were applied. Malathion achieved the highest suppression of\nboth pests. Within the bio-rational pesticides, nimbecidine gave the greatest\nthrips control whereas products showed no significant difference for whiteflies.\nThe study recommends those bio-rational compounds to join Integrated\nPest Management programs of both pests in Egypt, taking into consideration\nspraying for 3 consecutive times with at least 5 days intervals.
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