Formula fertilization Technology of Bean
1 characteristics of fertilizer requirement: the production of 1000 kg beans requires 10.2kg of pure nitrogen, 4.4kg of phosphorus pentoxide and 9.7kg of potassium oxide. (2) the main points of fertilization for 2000 kg per mu: 2.1base fertilizer. Before planting, 3000 kg of organic fertilizer was applied per mu, and 45% of the "Sakefu" potassium sulfate type three-element compound fertilizer was 40 kg. 2.2 foliar fertilizer. During bud appearance, 1.8% compound nitrophenol sodium water agent 6000 times or 1.2% compound nitrophenol sodium water agent 4500 times was sprayed once, and "Sakefu" foliar fertilizer was sprayed twice at intervals of 10 days.
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Main symptoms of bean rust
Bean can be infected with pathogen in the whole growing period, but the resistance weakens and the susceptibility increases during the period from the beginning of flowering to fruiting. The disease mainly affected the leaves, and in the early stage of the disease, there were little faded yellow and white spots under the leaves, and the spots gradually increased until the whole leaf was densely covered. It produces yellowish brown on the back of the disease spot.
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Chemical control of bean wilt
At the initial stage of the disease, 50% carbendazim wettable powder 1000 times or 10% Shuangxiaoling water agent 1000 times or 75% methyl topiramate wettable powder 1000 times, 50 to 150g per plant, once every 7 to 10 days, 2 to 3 times in a row. Can also be 50% carbendazim wettable powder 500 grams mixed with 200 kg dry soil, ditch applied to sowing.
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