To control rice fields and crabgrass, you can use Fazofosfamide, cyhalofop-butyl, and other drugs. From the picture, there have been 3 births of crabgrass, and the age of the grass is relatively large. The use of these drugs should be appropriately increased.
According to the trial of the plant protection and phytosanitary station of Jianhu County conducted by Pan Yong and others in 2014, in the 4 to 4.5 leaf stage of direct-seeded rice and 3 to 5 leaf stages of crabgrass, use 10% oxalidox EC at 120 ml and 10% cyanide per acre, respectively. Floxapol EC 100 ml, 10% Cyhalofop-ester EC 30 ml, 10% Profazoxacarb, 15 ml, 5% Valerian Valerian EC 50 ml, evenly sprayed with water, 20 kg, first 3 The pesticide treatment showed good control effect on the crabgrass of 3 to 5 leaf stages. The control effect of the strain was above 97.5%, and the control effect of fresh weight was over 95%. The control effect of saflufenacil treatment against Digitaria macranosa was relatively effective. Poor, strain control effect is 83.96%, and fresh weight control effect is 85.07%.
From the viewpoint of the safety of rice, the safety of falconamide and cyhalofop-butyl is better, and the safety of cyhalofop-butyl and fenzotrioxime and saflufenacil is mixed. Poor. 50ml of 5% pyrimidine-valerifene emulsifiable concentrate was used per acre. After 5 days of treatment, mild symptoms such as pale leaf color of rice seedlings and yellowing of middle part appeared. After 7 days of treatment, the injured rice seedlings gradually recovered, and they gradually recovered. The 10-day-old rice seedlings returned to normal. Per acre with 10% cyhalofop-sin cream 30 ml plus 10% sperm oxazolidone EC 15 ml treatment area, 7 days after the application of rice seedling leaves pale, pale leaves and other symptoms of phytotoxicity, especially In the middle of the field, the phytotoxicity was more pronounced in the repeated spraying sites. The leaves of the rice seedlings remained white after 10 days of treatment. The damaged plants were shorter than normal plants. After 15 days, the leaf color of the rice seedlings gradually recovered, but the middle of the rice field was repeatedly sprayed. Dwarfing obvious.
From the comprehensive consideration of the control effect of the crabgrass and the safety of rice, the control of large-scale crabgrass in direct-seeded paddy field can use 10% Fazodicarb EC and 10% cyhalofop-butyl EC, combined with the control effect and the cost of medication. , You can choose 10% Fazolyl EC.
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