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首页> 美国政府科技报告 >Waterlettuce Caterpillar, Namangana pectinicornis Hampson, for Biological Controlof Waterlettuce, Pistia stratiotes L
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Waterlettuce Caterpillar, Namangana pectinicornis Hampson, for Biological Controlof Waterlettuce, Pistia stratiotes L

机译：Waterlettuce Caterpillar，Namangana pectinicornis Hampson，用于水生生物的生物控制，pistia stratiotes L

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As waterhyacinth populations have declined wateilettuce is increasing and about$4 million is expended annually in Florida to control this aquatic weed. Waterlettuce increases water loss through transpiration and interferes with recreation and irrigation use. Namangana pectinicornis Hampson was introduced into quarantine in September 1986. In Florida, first and third instar larvae fed on only a few plants and did not live more than 6 days on any test plant except Impatiens. Some third instar larvae fed on linpallens and became almost mature, but none were about to complete development. Over 136 plant species in 50 families have been offered to larvae of Namangana pecllniwinis in tests in India, Indonesia, Thailand, and Florida. Larvae fed on only a few of these and were unable to complete development on any of them. In oviposition studies, moths clearly preferred to oviposit on waterlettuce instead of other plants offered. This extensive testing leads one to conclude that Namangana pectinicornis is sufficiently host specific to release in the United States as a biological control agent against waterlettuce.

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