|every year all my asiatic lillies come up strong and healthy. It doesn't take long for the beetles to get to them and go to town on them and prevent them from blooming. I douse them in seven almost 2-3 times a week. Is there anything else I can do?
|Answer from NGA
May 9, 2009
|I am always cautious about using Sevin because it kills bees and we need bees for pollination. Japanese beetles are a difficult pest to control. Your best bet is a two-prong approach: one to deal with the larvae, one to deal with the adults. Japanese beetle grubs are best controlled by spraying beneficial nematodes on the lawn and garden area. These microscopic worm-like creatures attack only the grubs in the soil and not plants, animals or humans. Spray them in spring when the temperatures are above 55F. For adult beetles, I'd try a new product called whole neem oil. This is different than standard Bioneem in that it is a stronger concentration of this organic spray.
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