Prevention and control of bitter gourd pests and diseases

Bitter gourd often has blight, anthracnose, powdery mildew and the like. The main pest is the fruit fly. 1. Powdery mildew: In the process of flowering and melon, the leaves are covered with white powder, which causes the leaves to lose green and yellow, causing premature senescence of the plants. Control method: When there is white powder on the leaves, spray the cyanopyrazole aqueous solution, the rusting aqueous solution or the sulfur suspension aqueous solution every 7-10 days for spraying, and spray continuously for 2-3 times. 2, the disease: on the leaves from the tip of the leaf or the edge of the leaf, the shape of the lesion is irregular, the periphery is not obvious, the initial dark green, water-stained, then brown. The lesion can be enlarged to the whole or the majority of the leaves. When wet, a white mold is formed at the junction of the disease and health. Epidemic or anti-drug or Golden Ray-Domil spray. 3, aphids: with triazophos, insecticide, insecticidal double, Rui Jinte, chlorpyrifos, Bt spray. 4, aphids: imidacloprid, avermectin spray. 5, melon flies: larvae into the melon damage, so that the young melon deformed, and color change in advance, followed by rot and deterioration, but also emits a foul smell. Control method: In the young melon period, use the Ruijinte aqueous solution, or the agricultural land aqueous solution, or Kungfu aqueous solution to spray the melon 2-3 times, once every 4-5 days, and then remove the deformed fruit, burned or deep outside the concentrated garden. Buried.


Source: Sichuan Rural Daily

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