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South Dakota

I had several leafs blow over a couple weeks ago and got a kink. I left them alone and they started getting brown rotting in the wound areas. I have now cut out all the broken leafs and cut away all the rot I could see,, sprayed with 20% peroxide solution, then painted the wound with undiluted daconil. One leaf had the rot already moved into a secondary vine. I had to cut off about 8 ft of the vine until I found good tissue on the stump end of the secondary. Is this rot bacterial, fungal, both, neither?? Would an application of Eagle do any good? Could I be over watering? Weather has been in 90's with humidity you could cut with a knife. I've been drip irrigating the equivalence of between 1/4 to 3/8 inches of water per day. Plant is doing awesome, this rot issue aside. I take it that I should have taken off those kinked leafs right away to prevent this from happening?

7/15/2019 8:43:44 PM

Germany

Got a kink? Which one? (just kidding, hope you don´t mind). Sounds like excess nitrogen (and as soon as the leaf stalk is open, infections can enter). As the leaf works like a funnel, guiding water down the stalk to the tap root, the water will be guided down into the open leaf stalk and fungi/bacteria will have a good time down there. In 2017 my plants were hit by severe hail on 28th June, and thereafter I inspected every single leaf stalk...I removed every leaf with injured leaf stalk in order to prevent rot. Also, Rhizoctonia infection is something that shows up in the lower leaf stalks. Removal of injured leaves, some fungicide and filling empty space with tertiary growth probably can´t hurt.

7/16/2019 5:01:35 PM

Germany

...better post some pics, in your diary entry from 28th June it doesn´t look like excess nitrogen. An update on leaf structure and pics of the area which show rot could be helpful for those who are willing to share their guesses.

7/16/2019 5:11:26 PM

South Dakota

I have trimmed up everything that I found infected so far. I am watching a couple that do not show rot, but were injured. Does the pumpkin still use the roots under the removed leafs to support the pumpkin, or has that node pretty much taking up space? I'll get some pics if anything more develops. I applied Daconil fungicide spray on July 5, but not sure how long that lasts. I'm thinking a systemic fungicide may be in order.

7/16/2019 7:35:27 PM

Germany

Systemic is best (imo), any the plant still uses the tap roots even in case of removal of the leaf.

7/17/2019 12:46:54 AM

Germany

"and", not "any". (I hate typos.)

7/17/2019 12:47:19 AM