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Pakistan Journal of Biological Sciences
Year: 2000  |  Volume: 3  |  Issue: 10  |  Page No.: 1670 - 1672

The Weaving Pattern and Structure of the Guy Ropes in Citrus Red Mite, Panonychus citri (McGregor) (Acari: Tetranychidea)

Abdul Razaq, Pear Mohammad, Masaya Shiraishi, Ryoko Tsutsumi and Junko Toda    

Abstract: The pattern of weaving by guy ropes in association with egg stalk was observed under scanning electron microscope in Panonychus citri (McGregor). The egg stalk was vertical having a base of 15.5 μm wide and its length was 146 μm. Initially few guy ropes extended from the tip of the stalk to the leaf surface of host plant. The ropes rolled up to 125 μm on the stalk tip and were stretched towards the surface. Several thin ropes combined together to form strong strand. The ropes were roughly surfaced and possessed granular materials. The development of new net was accomplished with further extension of thinner ropes, which were twisted over the thicker ones and pasted on the leaf. Mites used adhesive material for the fixation of threads on the leaf as well as for webbing. The thick guy ropes were segregated before sticking on the leaf surface. The surface of the leaf was covered with adhesive, which was invisible. Several ropes overlaps the hatching egg vertically and horizontally.

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