Effect of aerated compost tea on grapevine powdery mildew, botrytis bunch rot and microbial abundance on leaves
European Journal of Plant Pathology 2013
Botrytis and Powdery Mildew are two major fungal diseases that affect a very wide range of plants. In this study, researchers way down under in Tasmania were able to suppress the two diseases on grape bunches and grape leaves with compost tea. The compost was made from a mix of manures, forest products, and salmon fishery waste. Leaves and bunches were inoculated with diseases. The control group was not sprayed with teas, while the test groups were sprayed at 3 times before and three times after inoculation (at 4 day intervals). The researchers saw that compost tea reduced the severity of infection (area of leaf surface or grape bunch affected) to less than 1%. Non-treated plants had severity levels of 15-77%. This is huge. Compost tea was able to prevent virtually any incidence of PM or Botrytis. I think I'll be doing a little foliar spraying this afternoon.