euonymus wilt

Fusarium wilt of Euonymus tomentosa is a common disease of Populus tomentosa in recent years, which is characterized by severe disease, fast transmission and great influence on greening effect. Although this disease is stubborn, if we can take correct measures, aimed at the pathogen, multi-pronged measures can still achieve satisfactory results of prevention and control.

Symptom

At first, the diseased big leaf yellow field only lost water in the upper leaves of individual branches, and then the whole branches and leaves of the whole plant were withered and lost water. In the later stage of the disease, the leaves are yellow and white, and serious infection will lead to plant death.

Morbidity regularity

The pathogen is Fusarium oxysporum in the soil. Most of the germs invade from the root wound and can also invade the plant directly. The disease usually begins in the middle of May, and the peak is in July and August, and some plants do not exceed a week from disease to death.

Prevention and cure method

1. Strengthen epidemic inspection and strictly prevent diseased plants from entering non-epidemic areas; 2. To strengthen the management of water and fertilizer and improve the disease resistance of plants, the cultivated land should remain moist, but not stagnant water. If diseased plants are found, the diseased plants should be pulled out and burned in time. The cultivated land can be irrigated and disinfected with 75% chlorothalonil wettable powder 600 times per square meter, the dosage is 5 to 6 kg per square meter, continuously irrigated three times, each time at an interval of 5 days. 0.5 kg of sulfur powder can also be fully mixed with the soil for disinfection. 4. For undiseased plants, 50% carbendazim 500x solution or 65% Dysen zinc 1000 times solution can be used to control the plants alternately, spraying 2 to 3 times in a row.