Release of the coccinelld predator Stethorus gilvifrons (Mulsant) and bio-rational pesticides to supperss the population of Tetranychus urticae koch on cantaloupe plants in Egypt [electronic resource].

Includes references.

To estimate the effectiveness of the coccinelld predator Stethorus glivifrons. certain rational pesticides and combination between the two former [actors. against the two-spotted spider mite Tetranychus urticae Koch on cantaloupe plants were carried out throughout field trials. Predators (10 individuals/plant) were released only once, two, three and weekly throughout four weeks. In all cases predator's releases suppressed mite population. The reduction percentages of mite population were 9.3. 17.1, 27.9 and 52.4% after 1, 2, 3 and 4 releases, respectively. Whereas the reduction percentages of mite population were 72.6. 71.3, 70.6, 74.5. 75.7 and 72.7 % , when the infested plants were sprayed with the recommended concentrations of biofly , biosect , bioransa. hiomtite ,m-pede and safety - side throughout four weeks, respectively. Throughout fOUf weeks. predator released three times (one week interval) after onc week from biorational pesticide treatments markedly declined the populmions or the two-spotted spider mite. The reduction percentages were 94.9. 92.6. 93.6. 93.2, 93.8 and 92.5% for the predator and each of the biony, biosect. bioransa. biomitc, m-pede and safety-side during the 4th week, respectively.

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