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为明确对羟苯基丙酮酸双氧化酶(HPPD)抑制剂类新化合物ZJ10361[1,3-二甲基-4-(2-甲基-4-甲砜基-3-(2-对甲苯氧基)乙氧基)苯甲酰基-1H-吡唑-5-基碳酸乙酯]在玉米田的开发应用潜力,对该化合物的除草活性、安全性、选择性、杀草谱和田间药效进行了研究。室内生物测定结果表明,ZJ10361在有效剂量150 g/hm~2下对玉米安全性好,而对其他5种供试作物均有不同程度药害;对不同玉米品种之间的安全性有一定差异,其中对糯玉米科糯986安全性最好,其次为杂交玉米掖单13,甜玉米华珍最为敏感。该化合物在目标作物玉米Zea mays与反枝苋Amaranthus retroflexus、鳢肠Eclipta prostrata之间的选择性系数为4.0~4.5,具有较好的选择性;对阔叶杂草的除草活性较高,杀草谱较广,但对禾本科和莎草科杂草除草活性一般。田间试验结果显示,ZJ10361在有效剂量225 g/hm~2下对供试玉米安全性好,对玉米田杂草总草防效为86.9%,与对照药剂硝磺草酮有效剂量150 g/hm~2处理相比无显著性差异。该化合物用于玉米田防除阔叶杂草具有一定的开发潜力。
In order to elucidate the new compound ZJ10361 [1,3-dimethyl-4- (2-methyl-4-methylsulfone-3- Oxy) ethoxy) benzoyl-1H-pyrazol-5-yl ethyl carbonate] in the field of corn, its herbicidal activity, safety, selectivity, Effective research. The indoor bioassay results showed that ZJ10361 had good safety to maize at the effective dosage of 150 g / hm ~ 2, but had different degree of phytotoxicity on the other five crops tested. The safety of ZJ10361 to different maize varieties was different , Of which the waxy corn Branch Wax 986 best safety, followed by Yedang 13 hybrid corn, sweet corn Huazhen most sensitive. The selective coefficient between the target crop Zea mays and Amaranthus retroflexus and Eclipta prostrata was 4.0-4.5, which showed good selectivity to broad-leaved weeds and herbicide Broad spectrum, but weeds on grass and sedge weeds in general. The results of field experiments showed that ZJ10361 had good safety to the tested maize at an effective dose of 225 g / hm ~ 2, and the control effect was 86.9% on the total weeds in corn field. Compared with the control agent mesotrione at an effective dose of 150 g / hm ~ 2 compared to no significant difference. The compound has certain development potential for controlling broadleaf weeds in corn field.