How to treat muskmelon powdery mildew

Melon is a common fruit in summer, powdery mildew is one of the very common diseases, if you want to ensure the normal growth of muskmelon, then it is necessary to control powdery mildew in time. So how to treat melon powdery mildew?

How to prevent and cure melon powdery mildew?

1. Disease resistant varieties were selected. There are significant differences in disease resistance among different muskmelon varieties, so the selection of disease-resistant varieties is the key to control the occurrence of the disease.

two。 Clean the countryside. Weeds and residues should be removed in time after harvest, weeds should be weeded in time during the growing period of melons, diseased leaves should be removed, and weeds, residues and diseased leaves should be brought out of the field and burned.

3. Scientific management to enhance plant disease resistance. Apply sufficient base fertilizer, especially heavy application of rotten organic fertilizer, deep turning and fine rake; prevent overgrowth and premature senescence of plants, timely arrangement of branches and vines, strengthen ventilation and light penetration; pay attention to topdressing phosphorus and potassium fertilizer in the middle of growth, and make good use of foliar fertilizer to cultivate strong branches and enhance population disease resistance.

4. Scientific irrigation. To create environmental conditions suitable for melon growth and not conducive to the occurrence and development of powdery mildew. Irrigation should grasp four principles: no sunny day in cloudy days, no morning water in the afternoon, no big water, no small water, no open water and dark water (that is, dark irrigation under plastic film).

5. Chemical control. Choose 1000-1500 times of Fenru Ning wettable powder, 80-1000 times of 40% Dakoning suspension, 6000 times of 40% Fuxing EC, 2000 times of 10% Shigao water dispersible granules, 5000 times of 30% Teflin wettable powder, or 1000 times of 50% methyl topiramate wettable powder alternately, spray once in 7-10 days and spray 2-3 times in a row. Melons are forbidden to use medicine 7 days before harvest in order to harvest safely.

Symptoms of powdery mildew

It is mainly harmful to leaves, petioles and stems. At the initial stage of the disease, powdery mildew spots appeared on the front of the leaves, and then spread to the back of the leaves, quickly expanding to form a powdery layer, and in severe cases, it would spread to the back of the leaves, stems and petioles. Stem vine disease is the same as leaves, at first there are white powdery dots on the stem vine, and finally the whole stem vine is covered with white powder. In the later stage of the disease, the whole plant was covered by the powdery layer, and then the powdery layer became grayish white, and the scattered or stacked yellowish brown and small grain spots appeared in the powdery layer, and then turned black, that is, the closed capsule of the sexual generation of the pathogen, and the diseased leaves were withered and brittle, resulting in slow fruit growth in the early stage. After being cured, it will also leave a mark on the spot.

Powdery mildew is a common disease, as long as we do a good job of prevention and control, we can almost greatly reduce the harm of powdery mildew and effectively ensure the yield of muskmelon.