Biological control of the durian spider mite, Eutetranychus orientalis (K)
1994
Angsumarn Chandrapatya (Kasetsart Univ., Bangkok (Thailand). Faculty of Agriculture. Dept. of Entomology)
Amblyseius longispinosus (Evans), is commonly found on various plants including durian. The life cycle of this mite was 3.24 and 3.55 where larvae or eggs of E. orientalis was fed to the predator. Mass production of this predator on mulberry leaf in laboratory or on mungbean plants indicated that 228 or 222.2 predators were achieved when the beginning of 30 gravid females were released on the tested plants for 6 days. A gravid female of A. longispinosus requires 24 larvae of E. orientalis for maximize egg production of 3.07 eggs/day. Number of prey provided to the predator should not exceed 30 larvae per day. A proportion of 1:20 predator:prey is actually enough to gain proper control of the E. orientalis under field condition. However, a higher proportion of 1:5 or 1:10 is more suitable if rapid control is needed. Unfortunately, using this proportion will require additional of alternate prey in order to keep the minimum number of the predator on the plant, otherwise, releasing of predator is required when the pest outbreak is noticed. Omite and Nissourun were the only chemicals that are quite safe for this predator. Other chemicals namely: Poss, Azodrin 60, Kelthane, Malathion, Dicovin 40, Actelic, Vidate L, Anthio and Mitac are considered as toxic substance for this mite.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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