Control of muskmelon powdery mildew
1. Choose disease-resistant varieties. The disease resistance of different melon varieties was obviously different, so the selection of resistant varieties was the key to control the disease occurrence degree.
2. Clean the countryside. Weeds and residues shall be removed in time after harvest, weeds shall be weeded in time during melon growth period, diseased leaves shall be removed, and weeds, residues and diseased leaves shall be taken outside the field for centralized burning.
3. Scientific management, enhance plant disease resistance. Apply sufficient base fertilizer, especially heavy application of decomposed organic fertilizer, deep ploughing and fine harrowing; prevent excessive growth and premature senescence of plants, timely arrange branches and vines, strengthen ventilation and light transmission; pay attention to topdressing phosphorus and potassium fertilizer in the middle stage of growth, and use good foliar fertilizer to cultivate healthy branches and vines and enhance disease resistance of the population.
4. Scientific irrigation. To create suitable environmental conditions for melon growth and unfavorable for powdery mildew occurrence and development. Irrigation should master four principles: cloudy days do not irrigate sunny days, afternoon do not irrigate morning irrigation, do not irrigate large water irrigation small water, do not irrigate bright water irrigation dark water (i.e. dark irrigation under film).
5. Chemical control. 15% triadimefon wettable powder 1000 - 1500 times solution, or 40% Daconin suspension 800 - 1000 times solution, or 40% Fuxing emulsifiable concentrate 6000 times solution, or 10% Shigao water dispersible granules 2000 times solution, or 30% teflon wettable powder 5000 times solution, or 50% thiophanate-methyl wettable powder 1000 times solution and the like are alternately sprayed for control, and sprayed once every 7 - 10 days and continuously for 2 - 3 times. Medications are prohibited 7 days before harvest for safe harvesting.
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Management after planting thick-skinned melon in greenhouse
1. After the greenhouse temperature regulation and planting, in the early stage, in order to improve the greenhouse temperature and promote the slow seedling, the greenhouse film should be fastened strictly, and the grass should be uncovered in time; before flowering and fruit setting, the greenhouse temperature should be kept at 25-28 ℃ during the day and 16-18 ℃ at night. When the greenhouse temperature exceeds 28 ℃, the greenhouse film should be opened for ventilation, with the growth of the plant.
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Control of Fusarium wilt of muskmelon
Symptoms the disease can occur during the whole growth period of muskmelon. When infected at the seedling stage, the leaves of the diseased seedlings became lighter, wilted gradually, and finally died, and vascular bundle discoloration could be seen by cutting the stem. When the disease occurs in the adult stage, the plant leaves wilt and droop from the bottom up, and some of the leaf rafters turn brown or produce brown damage.
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