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Efficacy of new herbicides for weed control in transplanted rice under rice-wheat system.

机译:稻麦系统下新型除草剂对水稻移栽杂草的防治效果。

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摘要

A field experiment was conducted at CCSHAU Rice Research Station, Kaul during kharif (rainy) seasons of 2006 and 2007 to evaluate the efficacy of new herbicide penoxsulam with different rates and time of application in transplanted rice. Weeds caused 30 to 32% loss in grain yield in weedy check as compared to weed free treatment. Higher doses of penoxsulam i.e. 0.0250 kg/ha (1-5 DAT) and 0.0225 kg/ha (8-12 DAT), while at par with each other and also with hand weeding twice (20 and 40 DAT), proved significantly better in controlling grassy, sedges and broadleaf weeds and provided significantly higher grain yield (similar to hand weeding and weed free treatments) and higher weed control efficiency than the standard herbicide butachlor at 1.5 kg/ha (1-3 DAT). The lower doses of penoxsulam i.e. 0.0225 kg/ha (1-5 DAT) and 0.0200 kg/ha (8-12 DAT) were, however, similar to butachlor. The study also revealed that comparatively lower doses of the herbicide could be used when it was applied at early post emergence (8-12 DAT).
机译:在2006年和2007年的卡里夫(雨季)期间,在考尔的CCSHAU水稻研究站进行了田间试验,以评估不同除草剂喷施量和施用时间对移栽稻米的新除草剂培诺舒兰的功效。与无杂草处理相比,杂草在杂草检查中导致谷物产量损失30%至32%。较高的戊氧舒兰剂量,即0.0250 kg / ha(1-5 DAT)和0.0225 kg / ha(8-12 DAT),虽然彼此相等,而且还两次除草(20和40 DAT),但效果显着与标准除草剂丁草胺(1.5千克/公顷)相比,可控制草类,莎草和阔叶杂草,并提供比标准除草剂丁草胺显着更高的谷物产量(类似于手工除草和无杂草处理)和更高的除草效率。然而,戊氧舒兰的较低剂量,即0.0225 kg / ha(1-5 DAT)和0.0200 kg / ha(8-12 DAT)与丁草胺相似。研究还表明,在出苗后早期(8-12 DAT)施用除草剂可以使用相对较低的剂量。

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