Oubei is the main grain-producing area in Fujian Province, and its rice planting area is large. Since the beginning of summer this year, it has been hit by rare flood disasters in history, causing a large area of ​​middle rice to be affected and farmers’ economic losses serious. Strengthening post-disaster management to reduce pests and diseases is one of the effective measures to reduce the economic losses of farmers. Nowadays, it is the critical period for the prevention and control of panicle-necked lice in northern Anhui.
Panicle rice blasts occur mainly on the panicle neck or on the rachis and branches. Panicle neck disease, spot brown or grayish black, spread from the panicle neck up and down, up to 3 to 4 cm. Early onset and heavy onset caused white spikes, late onset, and mild disease, resulting in a decline in the weight of one thousand grains. Panicle pods often cause the spikes to break. Symptoms on cobs, branches, and reproductive branches are similar to those in the ear and neck, but only part of the spikelets above the lesion are affected.
Control methods: 1 Select good quality and high product varieties (combination), and change the varieties in time after several years of continuous planting. 2 Strengthen cultivation and fertilizer management. According to the results of soil testing, nitrogen, phosphorus, and potassium were applied in combination with the base fertilizer to topdress fertilizer early; avoid partial nitrogen fertilizer application and delayed application of nitrogen fertilizer. Shallow water ground irrigation, appropriate timely put aside fields, to fitness training to improve the purpose of resistance. 3 disinfection sterilization source. Remove or burn the sick straw in the field, and soaking with prochloraz, strong chlorine, etc. can prevent bacon disease. 4 timely field control of pesticides. There were plots with Miao 瘟 and Ye 瘟, susceptible cultivars, and the old wards where the terrain was low and were soaked in flood water. Each spray was applied 2 to 3 days before the break and at the beginning of the earliest stage, and 300 g of active ingredient per hectare was used. Tricyclazole or 30~45g kuramycin were uniformly sprayed with 450~675L of water.
Panicle rice blasts occur mainly on the panicle neck or on the rachis and branches. Panicle neck disease, spot brown or grayish black, spread from the panicle neck up and down, up to 3 to 4 cm. Early onset and heavy onset caused white spikes, late onset, and mild disease, resulting in a decline in the weight of one thousand grains. Panicle pods often cause the spikes to break. Symptoms on cobs, branches, and reproductive branches are similar to those in the ear and neck, but only part of the spikelets above the lesion are affected.
Control methods: 1 Select good quality and high product varieties (combination), and change the varieties in time after several years of continuous planting. 2 Strengthen cultivation and fertilizer management. According to the results of soil testing, nitrogen, phosphorus, and potassium were applied in combination with the base fertilizer to topdress fertilizer early; avoid partial nitrogen fertilizer application and delayed application of nitrogen fertilizer. Shallow water ground irrigation, appropriate timely put aside fields, to fitness training to improve the purpose of resistance. 3 disinfection sterilization source. Remove or burn the sick straw in the field, and soaking with prochloraz, strong chlorine, etc. can prevent bacon disease. 4 timely field control of pesticides. There were plots with Miao 瘟 and Ye 瘟, susceptible cultivars, and the old wards where the terrain was low and were soaked in flood water. Each spray was applied 2 to 3 days before the break and at the beginning of the earliest stage, and 300 g of active ingredient per hectare was used. Tricyclazole or 30~45g kuramycin were uniformly sprayed with 450~675L of water.