Hypoaspis miles (Mesostigmata: Laelapidae) - a potential regulator of Western flower thrips frankliniella occidentalis pergande (Thysanoptera: Thripidae)
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Author: Stoeva, Atanaska; Harizanova, Vili
The efficacy of the predatory mite Hypoaspis miles against the prepupal and pupal stages of Frankliniella accidentalis was studied under laboratory conditions. The regulating capacity of the predatory time at three different ratios predator: pray was evaluated indirectly using the degree of damage on the leaves on the control and experimental plants and directly by calculating the efficacy of the predator counting the number of the newly emerged adults in the control and experimental cages. The degree of damage on the control plants exceeded that of the experimental plants 2,53 fold at ratio 1:1, 2,91 at ratio 2:1 and 3,67 - at ratio 4:1. The efficacy of the predatory mite was highest at ratio 4:1 - 82,58%. At ratio 1:1 and 2:1 the efficacy was 48,75% and 63,26% correspondingly.