Worms In Pole Beans - Knowledgebase Question

West Burlington, IA
Question by mcthye
April 10, 2000
Last year a grew the long pole beans for the first time. Every bean had holes in it. Even after I powdered the beans the problem continued. How can I avoid having my green bean crop taken over by worms again this year? We have very clay like soil to work with. Is there any certain area in the garden I should plant these beans?


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Answer from NGA
April 10, 2000

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Did you see the worms? Sounds more like Mexican Bean Beetle which is a serious pest on beans. The adults are yellowish beetles, similar in size and shape to "Ladybugs" with 16 black spots on their backs. Larvae are fat, yellow grubs with long, spines. Yellow egg masses are on the undersides of leaves.

Good control can be obtained in a small garden by using floating row covers. Also earlier plantings are usually less bothered by the beetles. Handpick (or hand squish as I usually do!) the bugs. Check and eliminate egg masses on undersides of leaves. Soybeans planted nearby can be a "trap crop" since they are favored food. Use neem or pyrethrins as a spray if necessary. Always rotate crops at least every other year!

Consider adding organic matter, such as compost or leaves to your soil. Soils rich in organic matter are healthier and produce healthier plants that are able to resist pests and disease.

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