Perkembangan Dan Kemampuan Reproduksi Tungau Panonychus Citri McGregor (Acarina:Tetranychidae) Yang Resisten Dan Peka Terhadap Akarisida

Abstract

. Istianto, M. 2007. The Development and Reproductive Capacity of Panonychus citri McGregor (Acarina:Tetranychidae) that is Resistance and Susceptible to Acaricides. Panonychus citri mite is one of the most economically important citrus pests in Indonesia. The different status of mite susceptibility to acaricides is suspected causing the characters of P. citri change. The objectives of this research were to understand the differences of development and reproductive capacity of P. citri that was resistance and susceptible to acaricides with or without citrus essential oil treatment. Samples of P. citri were collected from citrus orchards of Kusuma Agrowisata and Indonesian Citrus and Subtropic Fruit Research Institute, Tlekung. The studies were conducted from October 2003 to February 2004 in Indonesian Citrus and Subtropic Fruit Research Institute,Tlekung, Batu, Malang and Gadjah Mada University, Yogyakarta. The susceptibility level of P. citri populations to acaricides were analysed by probit analyses while development and reproductive capacity due to citrus essential oil application were analysed by T-test. The results showed that higher concentration of propargite and amitraze acaricides were needed to kill 50-95% of P. citri population from Kusuma Agrowisata than those from Tlekung. The development and reproductive capacity of P. citri from both locations were not significantly different in the condition without citrus essential oil treatment. Citrus essential oil treatment indicated that P. citri population collected from Kusuma Agrowisata was more tolerant than from Tlekung. The number of eggs laid and larva of P. citri from Kusuma Agrowisata were higher than those from Tlekung. This facts indicated that resistance insidence could cause more disadvantage effects. Resistance of miles to pesticides also caused secondary metabolites as resistance agent of plant to pests not effective. Pesticides must be applicated at exact time, target, and concentration to avoid extended disadvantage