2026-03-15T23:10:09Z https://meral.edu.mm/oai

oai:meral.edu.mm:recid/154 2021-12-13T01:08:49Z 1582963567848:1582969200180 user-yau

Biology of the Cassava Mite, Tetranychus truncatus Ehara (Acari: Tetranychidae) Aung Myo Win Htar Htar Naing Ah Nge Htwe Ei Han Kyaw Thi Tar Oo The duration of developmental stages of Tetranychus truncatus Ehara was studied at four different temperature regimes (20, 25, 30 and 35˚C) on excised mulberry leaves. Longevity and fecundity of fe-male and sex ratio were also observed at 30˚C. Mites completed their development within this tem-perature range. T. truncatus eggs hatched to larvae in the shortest duration of 2.38 ± 0.06 days at 35˚C and the longest duration of 7.65 ± 0.05 days at 20˚C. Development time for completion of the life cycle de-creased significantly with increasing temperature. The longest (16.93 ± 0.11 days) and the shortest (5.34 ± 0.11 days) life cycle were observed at 20˚C and 35˚C respectively. The highest immature mortality was 13.94% at 35˚C followed by 10.35% at 20˚C. A female mite laid 55.07 eggs during its oviposition period of 10.93± 0.29 days at 30˚C. The oviposition rate was 5.13± 0.24 eggs/female/day at 30˚C. The sex ratio of T. truncatus at 30˚C was 1 : 3.12 (male: female). 2018 http://hdl.handle.net/20.500.12678/0000000154 https://meral.edu.mm/records/154