There was a brief wet period, so I thought that was the problem. Now it's been dry and the problem is still there. It's with yellow and Zuccihinni. I have fertilized and used eight dust for bugs. I don't have a smart phone so I can't send pics. email is: kayrgrant@bellsouth.net. Thanks for any help.
Many times, once it contracts an infection from a wet period, it will need to be treated. If it doesn't get treated, it can remain in the plant permanently.
There are several options on fungicides. This article will help you to get rid of the issue: https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
Alternatively, if this is just affecting the ends of the fruit, and not the plant, then you may be looking at simple deficiencies of calcium and magnesium. This can be corrected with an application of DOLOMITIC LIME.
DOLOMITIC LIME and WETTABLE SULFUR can be used together as an antifungal as well.
These articles will help you to grow squash and zucchini, respectively:
https://www.gardeningknowhow.com/edible/vegetables/squash/tips-for-growing-squash.htm
https://www.gardeningknowhow.com/edible/vegetables/zucchini/growing-zucchini.htm
Plants came up not planted by me. They get beautiful orange flowers, but they fall off with no vegetable growing on it. Why?
Here are some reasons the flowers may be dropping. See if any fit your situation:
https://www.gardeningknowhow.com/plant-problems/environmental/why-healthy-blooms-fall.htm
Many of the squash and tomatoes have badly damaged leaves. Have waited 10 days but they are not coming back. Should I prune off the damaged leaves? Would that help the plants recover?
The damaged leaves will never recover, but they will continue to carry out photosynthesis. Pruning will not, usually, help the situation, and can promote disease. Squash are very prone to infections.
The tomatoes, however, will enjoy a good pruning.
The best advice to follow, at this time, will be proper watering. You will want to water, only, when the soil has dried completely down to at least 2 or 3 inches. Soil that does not have a chance to dry out some will slow down any recovery.
Here are some articles that will help:
https://www.gardeningknowhow.com/edible/vegetables/squash/tips-for-growing-squash.htm
https://www.gardeningknowhow.com/edible/vegetables/tomato/growing-tomatoes-guide.htm
Planted zucchini, Delicata, acorn, and butternut. I now have squash that are definitely butternut shaped, dark green turning orange like acorn, and striped like Delicata. I thought butternut would not cross pollinate with the others. Don’t have a clue when to harvest.
According to the article below, squash will cross-pollinate between members of the same species. It does not rule out butternut.
Except for the zuchinni squash, it looks like harvest is when the rind turns hard. Good luck!
https://hortnews.extension.iastate.edu/1996/8-23-1996/crosspol.html
https://www.gardeningknowhow.com/edible/vegetables/squash/delicata-squash-information.htm
https://www.gardeningknowhow.com/edible/vegetables/squash/how-and-when-to-pick-acorn-squash.htm
https://www.gardeningknowhow.com/edible/vegetables/zucchini/zucchini-squash-harvesting.htm
https://www.gardeningknowhow.com/edible/vegetables/squash/butternut-squash-harvest.htm
Had 2 rows in 2 different gardens about 20 feet apart. 1st row attacked was 9 -10 weeks old producing alot. Started showing signs of leaves being skeletalized. Used sevin dust liquid spray. Did not stop. After 4 days pulled up 3 affected plants & burned. 2 days after the other 4 started & I pulled them also. Fearing spread to other garden of 7 plants, sprayed them with neem oil. Yesterday 09/14/2020 1 plant has started with signs and this morning the pics illustrate what is happening
This is, often, due to insect damage. When using insect sprays, it will be necessary to reapply often, but this doesn't always work. This article will help:
https://www.gardeningknowhow.com/plant-problems/pests/insects/skeletonized-plant-leaves.htm
However, the best method of control will be using a bacteria that is meant for controlling insects. This article will help:
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/using-bacillus-thuringiensis.htm
What do you know about growing Squash in central California. We are very lucky if you can get the vines to stay up through July. They want to wilt and then go flat. They turn light green and then down they go in a few days. I even purchased special disease resistant seeds, did not help. I put down reflective mulch to ward off bugs, that failed as well. What say you? Thanks, jim
You have the perfect climate for them, as long as you can keep insects and fungus away. Your area is known for many plant diseases and pathogens, so it will be necessary to fight these off, proactively.
These articles will help you:
https://www.gardeningknowhow.com/special/organic/what-are-organic-pesticides.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides
https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
https://www.gardeningknowhow.com/special/organic/biofungicide-information.htm
https://www.gardeningknowhow.com/garden-how-to/info/homemade-fungicide.htm
https://www.gardeningknowhow.com/edible/vegetables/squash/tips-for-growing-squash.htm
I have tried everything organic and nothing gets rid of it. I was also told this fungus lives in the soil.I am not even sure If I have sent the right pictures, there are to many and not enough time.
When you first see it, remove the affected leaves. The fungi are airborne, but they overwinter on plant debris so clean up the area and discard any fallen leaves. Make sure your plants are in full sun; the fungi will thrive in shade. Make sure there is good air circulation, too. Look for resistant cultivars.
Here are more tips to thwart this disease.
https://www.gardeningknowhow.com/edible/vegetables/pumpkin/powdery-mildew-on-pumpkins.htm
https://www.gardeningknowhow.com/plant-problems/disease/treating-powdery-mildew-on-cucurbits.htm