How to prevent carrot diseases and pests

The common diseases of carrots are black spot, black rot, and bacterial soft rot. The pests mainly include underground pests, aphids, and root lice.

For the control of black spot and black rot, good varieties were selected, rationally distributed, crop rotations were applied, organic fertilizers were added, weeds were used for weeding, no disease-resistant pests were cultivated, and the number of pests and diseases was reduced. Soaking in warm soup, seed dressing with 0.3% of 70% mancozeb. In the early stage of disease, 75% chlorothalonil WP can be used 600 times, or 50% skeleton WP 1500~2000 times, or 50% acetaminophen wettable powder 1000~1500 times, about 10 days. One shot, continuous control of 2 or 3 times, stop medication 15d before harvest.

In the prevention and treatment of bacterial soft rot, high ridge cultivation was adopted. The diseased plants were found to be excavated in time, and lime was added for spraying and spraying with 400 times of neomycin solution or 72% of Streptomycin WP.

Subterranean pest mites, golden worms, etc. are treated with 50% phoxim 2500-3000 times or 2000 times of Lethburn. The aphids were treated with 5% insecticide and 10% imidacloprid 1500 times. In the adult stage of adult rootworm, it can be sprayed with 2.0% of the enemy's killing EC at 3000 times, sprayed once every 7 days, and sprayed 2 or 3 times; during the larval stage, 7.5 L/hm2, or 40% octyl Phosphorous 15L/hm2 with rooting watering.

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