Common diseases and their prevention in June

powdery mildew

In June, many plants, such as heather and boxwood, are more susceptible to powdery mildew, with white powder growing on their leaves and becoming twisted.

Powdery mildew is a relatively common disease and is very harmful. It usually begins to germinate at around 20℃. When the temperature is high and warm, the disease develops rapidly.

In the early stage of powdery mildew, you can spray 15% oxycarboxin wettable powder for treatment, and pay attention to pruning and maintain ventilation.

Pyrus cypress rust

In June, cypress rust is also a very common disease. It mostly occurs in plants such as crabapple, pear trees, and papaya. The main symptoms are yellow-green spots on the leaves, and small yellow spots.

The main causes of rust disease actually include temperature, precipitation and wind, and the disease becomes more serious year by year, causing great harm.

When rust begins to appear on the plants, timely prevention and control measures should be taken. In the early stage, you can use 20% of triadimefon wettable powder and 12.5% ​​of the ricolini agent for spraying. Generally, they are used alternately, and sprayed once every 7-10 days. Basically, spraying 3-4 times in a row will produce obvious results.