How to prevent and control common pests and diseases of crowndaisy chrysanthemum? A detailed explanation of the latest methods

Crowndaisy chrysanthemum, also called emperor vegetable, is said to have been a delicacy of the ancient imperial court. Although its taste is slightly bitter, it is extremely rich in nutrients, containing multiple vitamins as well as calcium and iron, and also has the effects of purifying the blood and nourishing the heart, lowering blood pressure and moistening the lungs. Therefore, it is a relatively popular vegetable on the market, but as the planting area and yield gradually increase, pests and diseases follow. So what pests and diseases occur when growing crowndaisy chrysanthemum, and how should they be prevented and controlled? Let's take a look together with Qinnong.com.

1. Downy mildew

Downy mildew mainly harms the leaves. It is caused by fungal infection and spread. The mycelium overwinters on the host, and in the following year the spores spread through wind and rain, invading through the leaf stomata. When the disease occurs, faded lesions appear on the leaves. As the spores reproduce and grow, the leaves gradually turn yellow and lose their green color, and finally white mold appears on the lesions on the back of the leaves, just like frost in winter, hence the name downy mildew.

Prevention and control methods: Before planting, collect the diseased residues in the planting area and burn them, then deep-plow the soil to eliminate the overwintering of the pathogen. Strengthen management during planting, apply more phosphorus and potassium fertilizer to increase the plant's disease resistance. When the disease occurs, spray with 250-fold dilution of Shuangyiling wettable powder for control.

2. Damping-off

Damping-off mainly occurs during the seedling stage of crowndaisy chrysanthemum and mainly harms the base of the seedling stems. When the disease occurs, irregular brown lesions appear at the base of the roots. Affected seedlings wilt during the day but recover at night. As the disease develops, the diseased part begins to sink and constrict. When the lesions completely spread and encircle the stem, the plant begins to wither and die.

Prevention and control methods: Disinfect the seeds and soil to prevent invasion by the pathogen. Strengthen management before and after transplanting, pay attention to disease control, and after the disease occurs promptly spray with 1200-fold dilution of methyl tolclofos-methyl EC for control, or dilute Dajiangjun + Menshen at 600-fold and pour it as an irrigation. These two methods can achieve control.

3. Leaf spot

As the name suggests, leaf spot mainly harms the leaves, and after the disease occurs irregular lesions also appear, with concentric rings in the lesions. As the disease develops, the lesions gradually turn brown. In addition, it also spreads from the leaves to the stems and petioles, causing the plants to wither and affecting yield and quality.

Prevention and control methods: Rotate with other crops, avoid continuous cropping, choose well-drained plots for planting, apply more phosphorus and potassium fertilizer during planting to increase the plant's disease resistance, and promptly remove diseased leaves when diseased plants are found. When the disease occurs, spray with 200-fold dilution of Wuyi mycin aqueous solution or 6.5% jia-meiling dust for control.

4. Aphids

Aphids are a common pest of many vegetables. They like to live in groups and often suck dry the young and tender parts of plants such as leaves, tender shoots, and flower buds, causing the leaves to shrink, curl, and become deformed. If the aphids are severe, they can cause the entire plant to wither and even die.

Prevention and control methods: Before overwintering, collect and burn the weeds and debris in the field to prevent eggs from overwintering. Natural enemies can be used for control, or spray with diluted aphid-mite clearing EC for control.

The above are the common pest and disease prevention and control methods for crowndaisy chrysanthemum brought to you by Qinnong.com. The introduction to the pest and disease prevention and control methods for crowndaisy chrysanthemum ends here. We hope it can help you. For more agricultural knowledge, please continue to follow Qinnong.com.