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tomato herbicide contamination? #877225

Asked July 15, 2024, 6:51 AM EDT

I'm trying to find out if the soil in my raised beds has leftover herbicides from manure used in the soil mix. This is because all my tomato plants are showing abnormal growth on their new leaves. Last fall I started the beds with a locally made raised bed soil and planted a winter rye cover crop. It grew great and it was terminated in the middle of May. May 25th I planted 5 different types of tomatos, nasturtiums, cannabis, and cucumbers. Everything has been growing great. About 2 weeks ago new growth on the tomatoes slowed way down and all the new leaves looked deformed or had an odd vein pattern on the leaves. They are tightly curled up and very small. Some leaves on the plants are dying on one side. Looking at photos online leads me to believe it may be from residual herbicides. Does this look like what’s going on in the photos, if not then what is happening? Will the herbicides go away or do I need to do something else to remedy the problem? Thank you!

New York County New York

Expert Response

Hi Travis!

Thank you for contacting us! Sorry to see your tomatoes are not doing well. I notice you have some nice tomatoes on the vine. 

It is unlikely it would be left over herbicide, as all your plants would be effected. From the research I did, it appears your tomatoes have curly top. This is caused by a beet leaf hopper. I am attaching information for you to read. One source says the leaf hopper can't be killed, However, the second source recommends neem oil or insecticidal soap. I would definitely try these methods before giving up. 

With this heat, spray it on early in the morning.

I hope your tomatoes can pull through!

Cynthia MGV

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https://ipm.ucanr.edu/PMG/GARDEN/VEGES/PESTS/leafhopper.html



An Ask Extension Expert Replied July 15, 2024, 9:30 AM EDT

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