Question From: H. Lanin - Portland, Oregon, United States
Q: powdery mildew treatment for squash plant leaves? My plants were great and I listened to a neighbor who said they cannot get enough water so watered a bit more, now there is powdery mildew. Too late for Actinovate, is there a way to save the situation? They are busy making alot of squash and would be sad if they failed due to disease.
Actinovate will control powdery mildew once it attacks. Another option is Bonides Sulfur. Treat weekly and be sure to get the undersides of the leaves. Milk at a rate of 1 part milk to 9 parts water used prior to infection is used by growers in other countries. Remove badly infected leaves and clean pruners after use. I use alcohol at 1 part alcohol to 10 parts water. Good Luck and thanks for visiting Yardener.com. Nancy