Characteristic Damages Caused by and Preference on Three Varieties of Bananas of Pest Insect,Thrips hamaiiensis
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摘要: 以漳州香蕉种植基地为调查点,调查香蕉花蓟马的为害特点,比较该虫对‘威廉斯’香蕉、红蕉和粉蕉等3种香蕉花蕾及幼果的嗜好性。结果表明:香蕉花蓟马主要以12龄若虫及成虫,锉吸或产卵为害香蕉花蕾的子房、性别花及外层苞片和香蕉幼果表皮的鲜嫩部分。在香蕉花蕾外层苞片的3个垂直均分部位上,虫口量大小顺序为上部>中部>下部;在香蕉花蕾外4层苞片上,虫口量大小顺序为第2层>第1层>第3层>第4层;在香蕉花蕾3种性别花的子房上,子房虫伤点数大小顺序为雌性花>中性和雄性花。香蕉花蓟马对3种香蕉花蕾及幼果的嗜好性,以红蕉最强,粉蕉次之,‘威廉斯’香蕉最弱。Abstract: At the banana planting stationin Zhangzhou,characteristic damages caused by the pest insect,Thrips hamaiiensis,as well as the insect's eating preference on the buds and fruit lets of 3varieties of Musa nana were studied.The results showed that the first and second instar nymphs and adults of T.hamaiiensis made the most damages to the banana plants.They rasping-sucked or oviposited on the ovary,sex flower,outer bract of the bud,and the fresh-tender part of the fruitlet on a plant.The insect populations found on 3equally divided vertical parts of the outer bract of the bud differed and ranked as the upper part>middle part>lower part.The populations on 4layers of the outer bracts ranked as the second layer>first layer>third layer>fourth layer.The numbers of damage spots on the ovaries of 3sex flowers were greater on the female flowers than the neutral or male flowers.The eating preferences of the insects on the buds and fruitlets were M.AAA Group Red green>M.AAB Group Fenjiao>M.AAA Group Giant Cavendish Williams.
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Key words:
- Thrips hamaiiensis /
- characteristic damage /
- Musa nana bud and fruitlet /
- host preference
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