green bean pests

granny_cMay 24, 2006

Can anyone tell me what is decimating my green bean plants? It seems to happen at night - something turns the leaves into lace and then the leaves die and all I have left is the stem which just sits there. This only seems to happen when the plants are newly sprouted. TIA

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buttercupia(zone4 IA)

I'd go out with a flashlight after dark and see what's going on out there. One night I went out to see what was happening and saw both slugs and earwigs having a party on my young tender plants. Might be earwigs....I'd sprinkle with diatomaceous earth and some Sluggo.

    Bookmark   May 25, 2006 at 12:12AM
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username_5(banned for no reason)

The part that confuses me is what you mean by 'turns the leaves into lace'. Do you mean the 'meaty' part of the leaf is gone and the 'veins' are left?

If so it is unlikely to be slugs or earwigs as they just eat the leaf. If it is occuring only at night it is unlikely to be japanese beetles which do leave the veins alone and focus on the meaty portion.

Any other details you can provide to help with ID?

    Bookmark   May 25, 2006 at 12:59AM
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The Mexican Bean Beetle does that and since it looks quite similar to the Lady Beetle, because it is related, man ynew gardeners do not know what they are seeing. A yellow colored Lady Beetle like insect on the plants will be that Mexican Bean Beetle.

    Bookmark   May 25, 2006 at 8:34AM
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Going out with a flashlight is a good idea. I haven't done it because it's so late by the time it gets dark here and I'm an early to bed person, but this calls for desperate measures. lol And yes, username 5, only the veins are left. It's actually kind of pretty. I'll also check for Mexican Bean Beetle. Thank you for all the ideas!

    Bookmark   May 25, 2006 at 9:22AM
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OK. I went out last night and looked around and found absolutely nothing. Most of the bean plants are gone so maybe that's why. I'm going to start a new batch and try the diatomaceous earth on the leaves.

    Bookmark   May 26, 2006 at 4:28PM
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do you sprinkle diatomaceous earth on the leaves or on the soil around the base of the plants? would it coat the leaves, or just slide off?

granny, i had the same thing a couple of years ago and it was a beetle -- i think a japanese beetle -- that did it. if you do a google search ( japanese beetle) you'll find interesting info. one thing i just read is that the presence of beetles on a plant encourages more to come. the chewed up leaf itself also seems to. if you can hand pick them (knock them into a bucket of soapy water in the morning when they're sluggish) and decrease their numbers, fewer will be attracted in the long run.

    Bookmark   May 29, 2006 at 8:24PM
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(granny: have a great recipe for earwigs - they were the thieves in the night. Let me know if you want it.)

HELP!!!!!!!: beautiful pole bean plants - Musica (Renee's Garden) and some regular Kent. Blue Lake. Lots of water - very hot here - the small beans begin to turn into commas, and then get puffy, setting the beans. What happened??? They started out fine, Musica flat bean and delicious, and now even the Kent beans are doing the same thing. What's wrong??????? Been using beautiful worm compost (very proud) - too rich for the soil??

    Bookmark   August 19, 2007 at 1:51AM
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I plan to go out in the morning and flip the guys into the soap and water. I also found a recipe for a trap. 1 cup water, 1/4 sugar, 1 mashed banana and 1 pkg. of yeast.put this mixture into a jug with a narrow opening. I'm going to place one at each row and see what happens. Will let you know if it works.

    Bookmark   June 23, 2009 at 8:32PM
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anney(Georgia 8)

What insects is the trap for? Japanese beetles? Bean beetles? Earwigs?

You don't say.

    Bookmark   June 21, 2010 at 2:56AM
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