Shouguang, Shandong, a large vegetable growing plant Wang Yongsheng, through the MMS (152 **** 9751) March 6 Q: Currently the greenhouse squash planted squash soft rot is very serious, how to use drugs to save?
He Yongmei, Heshan District Vegetable Bureau, Yiyang City, Hunan Province, China A: The soft rot of zucchini should take preventive measures before planting, and it is best to implement crop rotation in the reoccurring areas. The specific measures are as follows:
The serious field of soft rot of zucchini should be implemented with onions and garlic vegetables rotation. It is difficult to implement the rotation of the plot, increase the lime per acre 100-150 kg, deep soaking soil or irrigation immersed in the field for a certain period of time, after the dry land preparation, using high mulching film covering cultivation. 15-20 days before planting, the soil is disinfected. The mixture of lime nitrogen and organic fertilizer can be applied to the soil. After fertilizing the soil, high temperature is used to kill the bacteria. Increase the row spacing and spacing, spacing 90-100 cm, spacing 50 cm, in order to facilitate field management. Apply sufficient organic fertilizer and drain it in time after the rain. After the shelter film is covered with protective film, it is fumigated with sulphur, with 1-1.5 kilograms per acre. The film is cultivated in high ridges and covered with film under the conditions. Drip irrigation under film can be used wherever possible to prevent sprinkler irrigation or flood irrigation. At the same time, the pruning should be performed at noon on sunny days, and the diseased plants should be removed in time and limed or showered.
When using chemical control, 0.5% amino oligosacchride 600 times solution was used to irrigate the roots during the colonization period, and spray control was conducted 15 days after colonization. Can also be used 6% chitosan 600 times liquid + 77% copper hydroxide wettable powder 600 times spray. At the beginning of the disease, 72% of Streptomycin Sulfate Wettable Powder 3000-4000 times, or 50% of Starch Copper Fertilizer Copper Wettable Powder 500 times, 77% of copper hydroxide wettable powder 500 times, 47% of Spring Thunder King Copper WP 800 times, 70% Basic Copper Sulfate Suspension 300 times, 3% Zhongshengmycin WP 600 times and 33.5% quinoline Copper Suspension 800 times etc. Spray Control, every 7 - Once in 10 days, keep it 2-3 times. In protective cultivation, 1 kg of 5% antibacterial dust is sprayed per acre, sprayed once every 7-10 days, and continuously for 2-3 times. Stop the medication 3-5 days before harvesting.
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