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。
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.
水葫芦的营养状况直接影响象甲的生长发育。
The fertilizer conditions of water hyacinth has directly effects on weevils reproductive capacity.
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