Slow-Release Toxicity Resulting from Fumigation with Selected Essential Oils Against Fungivorous Mite, Tyrophagus putrescentiae (Schrank) (Acari: Acaridae)

The fungivorous mite, (Tyrophagus putrescentiae Schrank) is an important pest infesting several economic stored grain products. The efficacy of essential oils against the fungal-feeding mite were evaluated by the evaporation method, at the laboratory of cotton and field crop mites at Gemmiza Agricultural Research Station, Gharbia Governorate. Adults mite mortality and egg hatchability were checked 24 and 48 h post- treatments by the fumigation methods. Black pepper oil was the most effective against the mite 24 and 48 h post- treatments with 55.34 and 70.67% adult mortality, respectively. The clove oil performed as the highest inhibitor of egg hatchability (70.33% mortality) with 32 % evaporation after 24 h of exposure. Clove oil induced the highest eggs mortality (81.66%) after 48 h of exposure, with 52%. fumigation rate. The average mortality of the mite 48 h of exposure to black pepper oil was 63.01% adult mortality. The Clove oil resulted in the highest value (75.99%) of egg mortality. The target of this study was to evaluate the effectiveness of essential oils (EOs) on adult mite mortality, as well as on inhibiting egg hatching.