My runner beans (about a dozen plants now about 6-8 ft. tall) are infested with
leafhoppers and are fading fast, although they still have some blossoms. Is
there an non-toxic solution to this at this late stage that anyone here has had
luck with? Is there any point in disposing of the current vines and starting
again, or will the pests once again prevail? (In my area, I have
blooming/fruiting vines until mid-October, usually.)
nNJ usa z7b
It's probably too late to replant the runner beans. I would try to rescue the
ones you do have. Give up only if the plants show gross signs of viral
disease beyond the typical 'hopper burn.' (That is if new, hopper-free growth
ends up being distorted and discolored.)
Spray the undersides of the leaves with a fairly good stream of water to knock
off the crawlers. Spray them again with a combination of seaweed, soap, and
hot peppers. (Hot pepper, I have found, repels the adult hoppers.)
Consider attempting to vacuum up the flying adult hoppers.
Use TOMATO RED sticky traps staked near plants for leafhoppers.
My pole beans often fade in the hottest part of the summer (with mild hopper burn
or in really dry summers some spider mite damage) and recover just fine with a
bit of attention by mid-late August.
Pat in Plymouth MI
Any technology distinguishable from magic is insufficiently advanced.
Thanks, Pat....I shan't give up, then, and I'll try the remedies. (I've been
doing the water/soap spray for a few days, btw, but the adults simply giggle
and dance!) I've had beans with mild hopper burn, as you describe, in the past
that went on to become heavily bearing vines. This is the fifth year at this
location growing runner beans and the first where the leafhoppers have been so
rampant. I wonder if it was that horribly cold wet spring......
nNJ usa z7
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