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young cucumber tan leaves #753732

Asked June 03, 2021, 11:46 AM EDT

i raised cucumbers from seed and trsnsplanted in garden in hills -5 in one garden and 5 in anothe r. cold weather last week and on frost advisory nite i covered 5 hills with buckets. some leaves were becoming tan before. don't think i got frost. in ensuing days most hills have more a nd more tan leaves . one hill dead. sprayed yesterday with daconil. what have i got? also have spots on tomato leaves. have had late blight on past. sprayed with daconil yesterday

Clinton County Michigan

Expert Response

Thanks for the question.

The cucumber plant could be suffering from cold damage. Nutrient damage is another possibility (potassium). If you haven't had a recent soil test, it would help (https://homesoiltest.msu.edu/). The tomato plant is most likely flea beetle damage. Check out the following link for more info:

https://extension.umn.edu/yard-and-garden-insects/flea-beetles

I hope this is helpful.

An Ask Extension Expert Replied June 03, 2021, 10:59 PM EDT

thanks. Suspect it was the cold weather, G. Flo

From: Ask Extension <<personal data hidden>>
Sent: Thursday, June 3, 2021 10:59 PM
To: Flo, Gretchen <<personal data hidden>>
Subject: Re: young cucumber tan leaves (#0023663)

The Question Asker Replied June 03, 2021, 11:21 PM EDT

brussel sprouts

Flo, Gretchen

Tue 6/22/2021 2:10 PM

To:

Ask Extension <<personal data hidden>>

i think i have had fungus ( mildew) on several plants and now maybe potato blight ( shich i have had for 3-4 year i hsve been spraying "daconil" fungicide since about june 1 after seeing a few yellow leaves in potatoes , green beans, beets etc. then 1/20 broccoli plants began dying. I started spraying br dprouts and broc about 2-1/2 weeks ago (twice). now the br. sp. are having ? beginning curl? ( see pics) .

can you help diagnose/ rec treatment

first picture br sp smaller than surrounding ones. 2nd picture 2 plants away is having leaves flop and looking like it's getting " sick"

3rd picture is the "bumps" on several leaves

thanks, Gretchen Flo, dvm, college of vet med

From: Flo, Gretchen <<personal data hidden>>
Sent: Thursday, June 3, 2021 11:16 PM
To: Ask Extension <<personal data hidden>>
Subject: Re: young cucumber tan leaves (#0023663)

thanks. Suspect it was the cold weather, G. Flo

From: Ask Extension <<personal data hidden>>
Sent: Thursday, June 3, 2021 10:59 PM
To: Flo, Gretchen <<personal data hidden>>
Subject: Re: young cucumber tan leaves (#0023663)

The Question Asker Replied June 22, 2021, 2:22 PM EDT

Gretchen, Not sure what happened but your question did not come through correctly. The pictures were also not accessible. Could you please resubmit. If that doesn't work I'll contact the tech people.

An Ask Extension Expert Replied June 22, 2021, 7:04 PM EDT

this is a new problem with brussel sprouts. i The previous cucumber issue is resolved- either plants died or revived using fungicide Daconil. I think i have other mildew problems with many plants cucumbers, green beans, potatoes, etc. i have had pot/tom blight in previous years and daconil saved me.

currently the case i am asking you is the brusse l sprouts. i have 3+ plants that have died or look like they are dying. have sprayed the last 2 weeks. the first

picture the plant is smaller , 3rd the leaves are "flopping", 2nd is bumps on leaves. hope this comes thru

Gretchen Flo

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From: Ask Extension <<personal data hidden>>
Sent: Tuesday, June 22, 2021 7:04:57 PM
To: Flo, Gretchen <<personal data hidden>>
Subject: Re: young cucumber tan leaves (#0023663)

The Question Asker Replied June 23, 2021, 8:47 AM EDT

Gretchen,

The "bumps on the leaves" may not be due to disease. Aphids can cause leaves to distort, bump and curl. Take a close look at the leaves, especially the bottoms. Thrips can also cause some distortion. A 10X magnifying loupe would help in seeing thrips. Leaf yellowing at the bottom is not unusual on Brussels sprouts. The partially wilted (floppy leaves) can be related to heat, overwatering, or underwatering. How are you irrigating and how much? If the soil at the depth of your index finger is soggy it may be overwatered. Fusarium wilt would be another candidate but won't be fixed with a fungicide. Let me know what you find on the leaves.

An Ask Extension Expert Replied June 23, 2021, 3:31 PM EDT

i was in drought like everyone

else ( but watered) til ? 2-1/2 weeks ago. then i got mote rain that a wms ton friend. got 2". then another 1", then another inch. and a little in between' my knuckle dept is wet but not soggy. most all t

he leaves are bumpy but no damage yet. the worst

plant i sent you earlier. i took off a small lower leaf. magnification doesn't show anything moving. i photoed the top and bottom surfaces blowing up my cell phone when took pic

Gretch

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From: Ask Extension <<personal data hidden>>
Sent: Wednesday, June 23, 2021 3:31:47 PM
To: Flo, Gretchen <<personal data hidden>>
Subject: Re: young cucumber tan leaves (#0023663)

The Question Asker Replied June 23, 2021, 4:48 PM EDT

One thing I failed to mention is that puckering of the leaves in somewhat normal. The failure to thrive, stunting could be explained by cabbage maggots (we are right at the end of egg laying). They can decimate the root system. Unfortunately, ruling out other problems isn't possible. If the plant dies, or you decide to pull it check the roots.

An Ask Extension Expert Replied June 23, 2021, 11:35 PM EDT

Thanks for the info. Maybe these leaves are "normal", as the puckering is mostly without any leaf dying. It was just the one stunted plant and a few others starting to droop. I will do a "post mortem" of any of the plants look like they are on their way out. My broccolli right beside it is doing well. Nice articles you sent, Gretch

From: Ask Extension <<personal data hidden>>
Sent: Wednesday, June 23, 2021 11:35 PM
To: Flo, Gretchen <<personal data hidden>>
Subject: Re: young cucumber tan leaves (#0023663)

The Question Asker Replied June 24, 2021, 7:37 AM EDT

Keep an eye out and contact us if you find additional symptoms.

An Ask Extension Expert Replied June 24, 2021, 2:27 PM EDT

fortunately things are going well. I have had maturing stem green and yellow beans rot at the ground surface, but not wide spread.

I have been removing yellow leaves (3- 4X) from my potatoes. Have had potato blight in the past few years and have been spraying about 1/week now. Potato flowers are hanging on longer than in years past. they have been blooming for 2 weeks. I looked on line and read they bloom for just a short time and I knew it means you could dig new potatoes.

I thought what was a good sign is new green leaves were forming on the base of stems that had been stripped.

I decided to dig 2 hills yesterday, and had a couple of what would be golf size potatoes and they were rotten. Other smaller ones rotten and a couple dime size that weren't rotten

My question is: if the rot is deeper into the ground (4-5") will it kill anything that may mature if the surface fungus has been whipped??????picture is aisleway of leaves left of potatoes

Thanks again for your helpful responses. I am going to spray fungicide now as I am then gone for a week, Gretch Flo, DVM

From: Ask Extension <<personal data hidden>>
Sent: Thursday, June 24, 2021 2:27 PM
To: Flo, Gretchen <<personal data hidden>>
Subject: Re: young cucumber tan leaves (#0023663)

The Question Asker Replied July 02, 2021, 1:54 PM EDT

Gretchen,

It seems your picture format did not allow your picture to come through.

The soft rot pathogen can enter the potato in various ways. Warm moist conditions can give rise to this disease. Not all the potatoes may be affected. When conditions are right this can happen. Check out the following links:

https://hort.extension.wisc.edu/articles/bacterial-soft-rot/

https://plantvillage.psu.edu/topics/potato/infos

An Ask Extension Expert Replied July 03, 2021, 7:33 AM EDT

young cucumber tan leaves #753732

Expert Response

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