I have a pumkpin plant and a part of its leaves are starting to get a powedery mildew & die. any suggestions?

Answer 1

Powdery mildew is caused by a fungus & is prevelant in humid weather with frequent dew and temperatures between 70 and 90 degree.
Using 1 part milk to 9 parts water works for getting rid of powdery mildew.

Paul James, master gardener and host of Gardening by the Yard says he used a milk-and-water solution (1 cup of milk with 9 cups of water) to control powdery mildew on cucumbers twice a week and his powdery mildew problem disappear. Milk has a germicidal effect (it kills the fungal spores) & it also appears to stimulate plants in such a way that they become more resistant to the disease. "In recent university tests, the milk and water spray was found to be more effective than the two most popular synthetic fungicides on the market today".
http://www.hgtv.com/hgtv/gl_diseases_pests_diseases/article/0,1785,HGTV_3579_1390268,00.html

Any kind of milk can be used, but Paul Crisp (University of Adelaide, Australia), recommends using dry-milk powder—15 grams for every liter of water. So far, he finds, this formulation appears to work on all surface mildews. It's best to use milk on sunny days because they need the sun's light to kick-start their mildicidal action.

Wagner Bettiol, a scientist from Brazil, found that weekly sprays of milk controlled powdery mildew in zucchini just as effectively as synthetic fungicides such as fenarimol or benomyl. Not only was milk found to be effective at controlling the disease, it also acted as a foliar fertilizer, boosting the plant's immune system. In his experiments with zucchini plants, Bettiol found that a weekly spray of milk at a concentration of at least 10% (1 part milk to 9 parts water) significantly reduced the severity of powdery mildew infection on the plants by 90%.

David Bruer, formerly a professor of enology (winemaking), likes to alternate using different organic agents such as mik: (emulsified canola oil and bicarbonate once a week and then moving to a spray of whey and then seaweed extract the next cycle) because they appear to offer different modes of action in killing mildew. He is reluctant to use one organic fungicide exclusively saying: "That might make it easy for the mildew to develop resistance to control."

Get rid of infected leaves & improve air circulation around the plants. I elevate my plants so they dry faster by putting stones & small rocks under them. Water early enough so there's not too much moisture around plants at night.
Good luck! Hope this was helpful.

Answer 2

It might be too late to save your plants, but not too late to set out new pumpkin plants. When you start to see powdery mildew, go to a specialty nursery (I don't think you can get it at Home Depot) and get some neem oil. Make sure you spray both sides of the leaves and apply as necessary.

Also, when you water, avoid getting water on the leaves. That's what's causing the mildew. Change the mulch around the infected plants, too. The spores can blow up from infected mulch, infecting your new plants.

Answer 3

There is not much you an do at this point. Hopefully there are some pumpkins forming and they'll be ready for Halloween! There are some treatments like Kopr Spray that kills these fungii, but you should apply it earlier in the year before the fruit or melons develop.

Answer 4

A slicing won't artwork. that's the seeds that count style. each 3 hundred and sixty 5 days there are some cherry tomatoes that get faraway from me and finally end up taking root, so i comprehend that works for particular.

Answer 5

cut the leaves off. you cannot hurt that plant. they are very hardy and pruning will only produce more flowering ends. i do it to my squash all the time when they get out of hand. they'll make more

Answer 6

too much water on leaves

Answer 7

to much water