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几个杀lily beettles的方

eeeeeeeee (阿E - ExitStrategy)
本文发表在 rolia.net/zh 相约加拿大网上社区枫下论坛
今年冬天暖,我的lily基本都毁在lily beettles上了。上网查了查总结了几个杀lily beettles的方:

1. 春天和秋天,在lily周围的土里喷10%solution of household ammonia杀虫卵。这个ammonia也可以杀Slug。

2. Neem will repel beetles and kill young larvae, but must be applied every 5 to 7 days after the eggs hatch。

3. 用手捉是最多人用的方法。


附lily beetle LIFE CYCLE:

The adult beetle overwinters in the soil or plant debris and emerges in early spring looking for food and a mate. After mating, the female lays eggs in lines on the underside of Lilium or Fritillaria leaves. Some damage is done by the adults at this time, but the major damage comes when the eggs hatch into larvae in 7-10 days. The larvae voraciously consume all leaves within reach and may then start on flower buds. This continues for 2 to 3 weeks, when the larvae then drop into the soil and begin to pupate. In another 2 to 3 weeks the adult beetles emerge to start eating again. This process occurs from early spring to mid-summer. Reportedly the beetles won't mate and lay eggs until the next spring.
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(#7641577@0)
2012-7-8 -05:00
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