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One of my plants the last two or three leaves have lost color from this morning. It's near the edges closest to the tips. The area has wilted. Another plant does not have these symptoms. The leaves are near the ends of the 3 main vines but not the newest growth. I treated with Daconil since it's bben two weeks anyway but I suspect too much Nitrogen? Too dark for pictures, will take pictures and post when able. Does this sound like a nitrogen problem or something else?
Thanks
Bait

7/17/2003 9:04:45 PM

Ctpumpkin@optonline.net

It could be. But it sure sounds like chemical damage of some kind. Was the fertilizer applied as a foliar? If so, salts left behind as the water evaporated from the little puddles that form at the edges could well be the culprit. Also what was the fertilizer rate, time of day applied, & temperature following application?

Steve

7/17/2003 10:19:00 PM

Tremor
7/12>> fish and seaweed (neptunes harvest) applied at slightly higher than recommended rate as a foliar and drench. Same rate and frequency for several prior weeks. 2 cups Calcium Nitrate disolved in 2 gal water as a drench and mostly foliar. This was the second week of this treatment. I did notice very similar if not the same symptoms on the same plant on one leaf only, a few weeks ago prior to the first Calcium Nitrate treatment. It only appeared on one leaf, the effected leaf finally turned light brown in the area where the pigment changed color. Update> This am, except for one leaf which was the worst effected, the condition has greatly improved. The areas where color was lost and there was wilting have become more uniform in color with the rest of the leaf and some of the leaves look almost normal again. What is especially strange is how it effected the same relative leaves on each of the three main vines only. No other leaves were effected. I apply everything after sunset. With the application of the Calcium Nitrate I avoid the newest growth. I have found some residue on some leaves in the mornings after the applications and washed it off. I have not seen any adverse effect from this. the leaves effected were not on the same plant where I found residue. I'll take pics today and post.
Bait

7/18/2003 10:10:36 AM

Ctpumpkin@optonline.net

"2 cups Calcium Nitrate disolved in 2 gal water as a drench and mostly foliar"

That's a fair amount of salty nitrogen source in a smallish amount of water. Was it warm, sunny, &/or brezzy folling the foliar application?

7/18/2003 1:54:40 PM

porterville,california usa

live; i have a bunch of pics on excessive N,P,and K in my diary. i intentionally over-used these chemicals, and under used them earlier this year just to see first hand the effects. i listed the cause and effects along with the pics. they`re somewhere in the middle of my diary. maybe some like your problem.

7/19/2003 4:24:55 AM

Booth Thanks, I looked at all. Nice work. I took some pics yesterday and will try to post in the next few days. My humble conclusion for now is that I did not avoid the newest growth on that plant during the application of Calcium Nitrate and I burned the new growth. Only the new growth at the time of the application was effected. The same application was done to another plant plus one other in my tomato patch that was a cull I dug up and transplanted. Tremor, my two cups is an estimate, I fill a small coffee can halfway and use half that in a 2 gallon +/- watering can with warm water. I use the 2 gallon watering can full on each plant. I do this after sunset. I water heavy the next morning. I do agree this is pretty agressive, I figure if I want a big pumpkin I need a big plant. I use the same mixture on Tomato plants in a 10x10 plot with no negative results except some big plants. Plants were put in the ground later than I wanted (May 30) due to germination problems so this was the second and final nitrogen treatment until after good fruit set. I pollinated the first pumpkin this morning. I am a new grower and I welcome any comments on this use of Calcium Nitrate. I have more than I can use if someone in the area wants some. Bait

7/19/2003 2:43:53 PM