How should watermelon gummy stem blight be treated?

There are three treatment methods for watermelon gummy stem blight. The first is seed treatment: before sowing, soak the seeds in mancozeb wettable powder for 1-2 hours, then plant them. The second is agricultural control: doing a good job with water and fertilizer management, garden cleanup and other tasks can effectively treat it. The third is chemical control: spraying with flusilazole emulsifiable concentrate + zineb wettable powder, or applying thiophanate-methyl wettable powder or flusilazole emulsifiable concentrate to the affected areas can effectively control it.

Specific control methods for watermelon gummy stem blight:

1. Seed treatment

Treating seeds before sowing has a relatively good control effect on gummy stem blight.

Specific procedure: before sowing, soak the seeds in a 700-fold dilution of 70% mancozeb wettable powder or a 500-fold dilution of 50% thiophanate-methyl for 1-2 hours, which can effectively control the onset of disease in seedlings.

2. Agricultural control

(1) Rotate watermelon plots with non-cucurbit crops for 2-3 years; apply sufficient basal fertilizer, apply more decomposed organic fertilizer, especially cake fertilizer, use nitrogen, phosphorus and potassium in combination, do not apply excessive nitrogen fertilizer, fertilize with a balanced formula, and strengthen plant growth.

(2) Choose plots with good drainage and irrigation for planting; after rain, promptly remove diseased leaves; after harvest, thoroughly clean up diseased plant residues in the melon garden and weeds at the edges of the field, and bury them deeply or burn them in a centralized manner to reduce sources of disease.

(3) In terms of planting method, choose furrow planting or high-ridge planting. If the plot has relatively severe salinization, furrow-ridge planting can be used, that is, open a furrow 80 cm wide and 20 cm deep, and build a small ridge 50 cm wide and 10 cm high at the bottom of the furrow. When watering, water can flow past the seedling stems, reducing the salt content around them, and after watering it can also avoid water accumulation around the seedling stems. Practice has shown that this method can significantly reduce the disease incidence rate.

(4) Spreading grass under the vines can also effectively reduce opportunities for pathogen transmission, while lowering humidity, thereby reducing or preventing disease occurrence.

3. Chemical control

A 3000-5000-fold dilution of 40% flusilazole emulsifiable concentrate + a 600-fold dilution of 65% zineb wettable powder can be sprayed; a 1500-fold dilution of 10% difenoconazole water-dispersible granules can also be sprayed, once every 7-10 days, for 2-3 consecutive sprays; for severely affected plants, first scrape off the rotten tissue with a knife, then use a 50-fold dilution of 70% thiophanate-methyl wettable powder or a 100-fold dilution of 40% flusilazole emulsifiable concentrate, dip a brush in the medicine and apply it to the stem lesions, which can relatively well control the occurrence of watermelon gummy stem blight.

The above is the relevant introduction to treatment methods for watermelon gummy stem blight, and we hope it is helpful to everyone.