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Opisina arenosella
''Opisina arenosella'' Walker, or the coconut black-headed caterpillar is common in multiple East Asian countries including Bangladesh, India, Sri Lanka, Mayanmar, as well as Indonesia. It is considered a pest to these countries, as they infest coconut palm trees, causing considerable damage to the trees, and reducing the plant's yield significantly. This is a great burden to all countries who experience infestations, as coconut is one of the main crops driving the economy. The species exists on coconut palms in all forms, from larval to moth, and utilizes the tree fronds as a main source of nutrition. Various methods of control have been explored, yet the primary control method is the administration of pesticides directly to the root of the coconut palms.
==Identification==
The coconut black-headed caterpillar is identifiable in the larval form as a caterpillar with greenish brown with dark brown head and prothorax, and a reddish mesothorax. There are often brown stripes on the body of the larva.〔(【引用サイトリンク】url=http://www.advanceagriculturalpractice.in/w/index.php/Black_Headed_Caterpillar )〕
Post pupation, the caterpillar morphs into a moth which is greyish white in colour. The female is distinguishable from the male in that it has longer antenna, and three faint spots on the forewings, while the males have fringed hairs in the apical and anal margins of the hind wings.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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