Control of potato diseases
Disease is one of the important factors affecting the yield and seed character of potato in winter. The main diseases and control methods of potato in winter in Yunnan Province are introduced as follows:
Virus disease control methods: selection of virus-resistant varieties and virus-free seed potatoes; removal of diseased plants in the field; timely control of aphids.
Fungal disease one is late blight. Control methods: selection of disease-resistant varieties and disease-free seed potatoes; timely removal of central diseased plants and intermediate ploughing and weeding; chemical control. The second is early blight. Control methods: selection of disease-resistant varieties; chemical control.
Control methods of bacterial disease ring rot: select disease-resistant varieties and disease-free seed potatoes; remove diseased plants in time; carry out crop rotation and pay attention to the control of underground pests. Prevention and control methods of bacterial wilt: agricultural control is mainly: rational crop rotation. Select disease-free and disease-resistant varieties to prevent rotten potato from being mixed with fertilizer, apply more phosphorus and potassium fertilizer, remove weeds in the field, and find central diseased plants to be pulled out in time. Disinfect the disease hole with lime and drain the low-lying land in time: irrigate the root with 50% copper succinate wettable powder 500 times or 14% ammonia copper water 400 times, once every 7 to 10 days, continuously for 2 times. Control methods of soft rot; agricultural control measures include strengthening ploughing and cultivating soil before harvest and paying attention to field drainage; mature tubers avoid manual and mechanical damage in the process of harvest and shipment. The prevention and control of black shank disease can be controlled by seed dressing with 7.5kg/hm2 or Bengkejing solution, or foliar spraying 0.1% copper sulfate solution. To prevent and cure scab, 18% mancozeb powder can be used to treat seed potato or fumigate soil, or soak the seeds with unheated formalin 200: 250 for 20 minutes for 30 minutes, and remove them for 6 hours after soaking.
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The usage of Toyota Golden potassium on Potato
Potato is a typical potassium-loving crop. It takes 0.5 kg of nitrogen, 0.2 kg of phosphorus and 1.06 kg of potassium to harvest 100 kg economic yield (tuber). It can be seen that potassium is twice as much as nitrogen and 5 times as much as phosphorus. Toyota gold potassium has been applied to potatoes by farmers in Tangshan, Tianjin and Wumeng, Inner Mongolia for several years, and the effect of increasing production is obvious. There are two uses: 1. seed dressing: 150kg seed per mu, Toyota gold potassium can be used (zip code: 454650, address: Tiexi, Jiyuan City, Henan Province)
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French fried frozen horse bell fries
French fried frozen horse bell fries: peeled and sliced potatoes with a thickness of 6.35-12.0 mm and a length of more than 10 cm. The cut strips are cleaned to remove starch from the surface. Then soak or spray potato strips with antioxidant solution to prevent oxidation and discoloration of potatoes. The antioxidant solution contains 0.5-1% sodium pyrophosphate, sodium disulfate or other decolorant. Heat the solution to 55-82 ℃, soak the potato strips in this solution for 10-25 seconds, then blanch the potato strips to inactivate their metabolic function.
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