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Pakistan Journal of Biological Sciences
Year: 2000  |  Volume: 3  |  Issue: 9  |  Page No.: 1472 - 1474

Scanning Electron Microscopic Observations on the Hatching of Egg of Citrus Red Mite, Panonychus citri (McGregor) (Acari: Tetranychidae)

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

Abstract: The changes in egg of citrus red mite, Panonychus citri (McGregor) Mari: Tetranychidae) during hatching were observed under scanning electron microscope. The egg was jewel-shaped having a diameter of 120-145 pm. The guy ropes and stalk broken down after two weeks of laying eggs. The characteristics of the shell surface gradually changed before hatching. The vertically patterned ridges appeared from the stalk base toward the middle portion of the egg. With the passage of time, the egg surface converted into deep patchy form. The embryo developed and the larva made a pair of hales in the middle region of egg using claws. The inside surface of the shell was smooth. The internal surface was spongy and external surface was patchy type having a thickness of 1 pm. The cleavage appeared on the equatorial portion of the egg and the larva came out. The deposited eggs had sticky wax materials on its ventral side for attachment on the leaf.

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