I am also on Long Island and when the heat and humidity hit I got powdery mildew on all my squashes. Tried cutting off the leaves but that did not do it. I sprayed with Neem three times. Once, them two days later again and two days after that again. That stopped it. Make sure you do both sides of the leaves (top and bottom) and the stems also. Plus do both the new clean leaves and the ones already with the mildew. Now I just spray weekly to control/stop the mildew.

Premature pumpkin harvest here. Heard a large crack in the back yard yesterday, and went outside to find my largest Big Max lying on the patio with a big gouge out of it. Either it got too heavy for the stem to support or the squirrels were playing with it. Anyway, it broke off and rolled down a slight slope and over the retaining wall fence. Decided it was nature's way of telling me to harvest and get the vine into the compost pile. The big pumpkin weighs 43.5 pounds and has a 54 " circumference. The smaller one is only 13.3 pounds with a 31" circumference. Loved growing these this year and will probably grow them again next year. 3 New England Pie pumpkin plants have produced 5 good sized pumpkins and I have 6 more that should be ready in a few weeks!

Hi, I'm having same problem with the females yellowing and shriveling before blooming on a couple of my plants. I've been told it may be the heat. As for the PM, I have that problem too. I've lost leaves but new ones grow in. My plants with PM are growing pumpkins, it seems successfully. I've been spraying with a fungicide once a week or after heavy rain. It doesn't cure it but it does control it. If you are uncomfortable with fungicide, I know some people spray and control PM with a milk or baking soda mixture. If you pick up a pump sprayer you make treating for PM a pretty quick job.

The angular splotching in the vein intersections is a naturally occurring anomoly. It's absolutely nothing to worry about and shouldn't be treated. That is very different than what we see in the original image, which does appear to be PM, at least in your picture. Maybe it's all normal cucurbit splotching. I've attached a link to Google images of white splotches. Some show PM and others are of the other markings. You may have to decide for yourself. I've never used worm tea, milk, or baking soda. My preventative treatments always include good spacing between plants, conservative fertilization practices, rinsing of foliage with plain water, neem applications. Be sure to collect and dispose of infected foliage. Kimmsr has always recommended the milk or baking soda and many report success with it. Worthy of a try if you think your plants have PM. Here is a link that might be useful: splotches