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Nova Scotia

the vine tips nearest my squash have turned yellow and are dying. I figure I must be low on either magnesium or nitro or both. but if you know let me know please

7/19/2016 8:47:51 AM

Germany

If it happened all of a sudden, an initially healthy looking plant turning sick within few days, I guess there must be something else which happened all of a sudden as well. Extremely cold and cloudy weather, cold rain etc. which might have had bad influence on nitrogen and magnesium availability via root system? If not, then it´s likely to be a disease or "spray damage" from something that was never meant to hit your plant. Your soil won´t run out of Mg and/or N within few days without making the plant look Mg- or N-deficient much earlier (at levels which won´t make the vine tips want to die).
Sometimes vine growth stops as soon as the fruit is close to peak daily gains, but looking into your diary I assume your plant/fruit hasn´t reached that stage yet.

Any neighbors who maybe sprayed roundup or anything else on a windy day?

7/19/2016 9:28:06 AM

Nova Scotia

no spraying chemicals allowed in the city were I live. temperatures have been good, maybe a little to hot. the plants was possibly showing slight signs of mag and nitro deficiencies. I will post pics of the plant and issues. again this is happening only to vines closes to squash.

7/19/2016 11:35:43 AM

Eastern Pennsylvania

Mg deficiency would be expressed in the oldest leaves closest to the stump not the new growth. Iron deficiencies will show up in the new vine tips though.

7/19/2016 12:05:19 PM

only real way to know without guess send a leaf in have test you will learn more about your plants and patch for future

7/19/2016 12:11:27 PM

Nova Scotia

Good advise Don but I was hoping to break my areas squash record this year so looking for a quick fix.
Thanks orangeneck your theory sounds pretty good. I started year off with a 4.96ppm iron but who knows right now

7/19/2016 2:00:47 PM

Nova Scotia

;pics are up

7/19/2016 2:47:03 PM

Nova Scotia

I think I figured it out. Quote "most calcium decencies are caused by unfavorable growing conditions, not a lack of calcium in the soil. such conditions as hot windy condition's, continuously humid conditions, also water logged soil. I have had all three of these conditions for at least 5 days. its been very windy, hot and humid, with heavy rains every night water logging my soil."
apparently this shows in new growth by stunting, deforming and yellowing of new growth and since pumpkins draw a lot of calcium, it makes sense that it would chow in vines close to my squash.

7/19/2016 3:38:02 PM

Western PA

I have had the same thing in 2013 when we got over 11 inches of rain in June. Water logged soil is probably your problem. growth almost stops, like the plant goes into survival mode to protect itself. My plant recovered later in the season, when it was too late to get a big fruit. Hope the weather gets better for you.

7/19/2016 5:55:35 PM

Central NY

Good call mr t...

7/19/2016 6:40:13 PM