利用天敌控制水葫芦疯长研究

水葫芦象甲对２３个科、４６种植物不产生危害，只取食水葫芦，是单食性昆虫。象甲对水葫芦重量控制平均为５４．３％，株高控制为４２．４％，根长控制为１９．２％，叶片控制为１０．６％，植株分蘖控制率达３２％。象甲在昆明具有良好的生物学适应性。对控制滇池水葫芦疯长，恢复生物多样性、保持生态平衡具有重要价值。

Controlling Waterhyacinth Wild-growing Research with Natural Enemy

The waterhyacinth weevil(Neochenita eichhorniae) is a kind of insect with single feeding habit,which only feeds on waterhyacinth not endangering 23 families,46 species plants.The average weight controlling rate of Neochenita eichhorniae to waterhyacinth is 54.3%,height controlling rate is 42.4%,root length controlling rate is 19.2%,leaf controlling rate is 10.6%,plant tillery controlling rate is up to 32%.Neochenita eichhorniae is good adaptability in Kunming,which have important value to control the wild-growing of waterhyacinth in Dianchi,rehabilitate biodiversity and keep ecological equilibriurn.