How to get rid of powdery mildew on zucchini without chemistry
Zucchini do not tolerate sudden temperature changes. But in the middle zone of Russia in the summer there is a sharp cooling and rains. At night, the air temperature can drop to +10ABOUTC. During such periods, pumpkin crops are especially susceptible to fungal diseases. Powdery mildew spores can survive both on squash leaves and on the soil surface at the base of the plant stem. Consider the causes of powdery mildew on the leaves of squash and other pumpkin crops.
The causes of powdery mildew
A disease called "powdery mildew"Is of two types:" American powdery mildew "(spots on the leaves of white) and" powdery mildew "(spots on the leaves of plants of brown color). These two diseases are caused by different microorganisms.
Powdery mildew is caused by the transfer of fungal spores by insect pests. There are two ways to fight this disease: treat the plant with chemicals directly from powdery mildew or add insecticides to the soil, destroying insect-spreading insects.
But if the zucchini got sick with American powdery mildew during the fruiting period, then it is not recommended to introduce chemicals into the soil. Insecticides are poisons designed to kill insects; they contain a large number of toxic substances. These poisons are absorbed through the roots of the plant and enter the vegetable marrow.
Fighting powdery mildew folk remedies
If you notice the first signs of powdery mildew during fruiting, cut off the diseased leaves of the plant.
The next day, after removing diseased zucchini leaves, it is necessary to spill well with a solution of soda ash and soap. It is necessary to dissolve one tablespoon of each ingredient in 10 liters of water. Such treatment will destroy the as yet undeveloped spores of American powdery mildew.
The cut leaves must not be added to the compost heap and must be burned.
Brown spots on zucchini leaves appear due to poor ventilation of the root system. Zucchini can get sick with powdery mildew due to sudden changes in temperature. If you notice the first signs of a powdery mildew infection, cut off diseased leaves and thin out healthy ones to ensure airflow. Loosen the soil around the vegetable marrow to ventilate the plant's root system.