Population Parameters of Tetranychus cinnabarinus Boisduval (Prostigmata: Tetranychidae) on Eight Strawberry Cultivars

Authors : Cengiz KAZAK, Cemal KİBRİTÇİ

Pages : 19-27

View : 20 | Download : 10

Publication Date : 2008-01-01

Article Type : Research Paper

Abstract :Development times, reproductive rates, and population growth parameters of Tetranychus cinnabarinus Boisd. on 8 strawberry insert ignore into journalissuearticles values(Fragaria x ananassa Duchesne); varieties were evaluated under laboratory conditions. Total development times of immature males and females were not significantly influenced by the strawberry varieties. T. cinnabarinus laid significantly more eggs per day on cultivar Muir insert ignore into journalissuearticles values(8.46); than on the other cultivars. Similarly, T. cinnabarinus on Muir had the highest net reproductive rate insert ignore into journalissuearticles values(Ro); insert ignore into journalissuearticles values(120.19 F/F);, while Ro was the lowest on cultivar Sweet Charlie insert ignore into journalissuearticles values(39.51 F/F);. The generation time ranged from 18.96 to 22.32 days, but no significant varietal effect was seen. The intrinsic rate of increase insert ignore into journalissuearticles values(rm); showed a pattern similar to that of Ro; it was highest on Muir insert ignore into journalissuearticles values(0.253); and lowest on Sweet Charlie insert ignore into journalissuearticles values(0.208);. The results indicate that Muir was the most favorable strawberry cultivar for T. cinnabarinus population growth, whereas Sweet Charlie was the least suitable, under controlled conditions.
Keywords : Tetranychus cinnabarinus, strawberry, life tables