摘要
异噁唑草酮和噻酮·异噁唑是新型、广谱、高活性的土壤处理除草剂。明确异噁唑草酮和噻酮·异噁唑对玉米田杂草的除草活性及对玉米的安全性是该药剂在玉米田应用的重要内容。本文采用温室整株生物测定法研究了两种药剂对玉米田常见杂草的除草活性及对玉米的安全性。结果表明:20%异噁唑草酮悬浮剂和26%噻酮·异噁唑悬浮剂土壤处理对玉米田杂草有较高的除草活性,两种药剂对各种杂草的GR 90均低于田间推荐剂量。20%异噁唑草酮悬浮剂土壤处理对阔叶杂草藜、苘麻、反枝苋和苍耳均有较高的除草活性,GR 90均小于54 g/hm^(2),对禾本科杂草狗尾草、马唐、稗和野黍也有较高的除草活性,GR 90均小于63 g/hm^(2)。26%噻酮·异噁唑悬浮剂对阔叶杂草藜、反枝苋、苘麻和苍耳也有较高的除草活性,GR 90均小于62 g/hm^(2),对禾本科杂草狗尾草、马唐、稗和野黍也有较高的除草活性,GR 90均小于59 g/hm^(2)。20%异噁唑草酮悬浮剂和26%噻酮·异噁唑悬浮剂土壤处理对玉米的安全性很高,对玉米和杂草的选择性指数均高于17。异噁唑草酮及其混剂噻酮·异噁唑用药量低、除草活性强、对玉米安全,是玉米田土壤处理除草剂较为理想的替代产品。
Isoxaflutole and thiencabazone-methyl·isoxaflutole are novel,broad-spectrum,highly active and soil applied herbicides.It is important to evaluate their herbicidal activity and safety to maize for their further application.The herbicidal activity of isoxaflutole and thiencabazone-methyl·isoxaflutole on four broadleaf weeds and four grass weeds and their safety on different maize varieties were measured by greenhouse whole plant bioassay.The results showed that soil treatment with isoxaflutole 20%SC and thiencabazone-methyl·isoxaflutole 26%SC had high herbicidal activity on weeds in maize field.The GR 90 values of the two herbicides to weeds were lower than the recommended dose in the field.Isoxaflutole soil treatment had good herbicidal activity on the broadleaf weeds lamsquarters,velvetleaf,redroot pigweed and siberian cocklebur.The GR 90 value of isoxaflutole was less than 54 g/hm^(2) for the broadleaf weeds,and that of isoxazolone 20%SC soil treatment was less than 63 g/hm^(2) for green foxtail,hairy crabgrass,barnyardgrass and hairy cupgrass.Thiencabazone-methyl·isoxaflutole 26%SC soil treatment had good herbicidal activity on the broadleaf weeds lambsquarters,velvetleaf,redroot pigweed and siberian cocklebur.The GR 90 value of thiencabazone-methyl·isoxaflutole 26%SC was less than 62 g/hm^(2) for broadleaf weeds,and that of thiencabazone-methyl·isoxaflutole 26%SC was less than 59 g/hm^(2) for green bristlegrass,hairy crabgrass,barnyardgrass and hairy cupgrass.Isoxaflutole and thiencabazone-methyl·isoxaflutole were safe and didn’t cause injury to maize.The selectivity indices of isoxaflutole 20%SC and thiencabazone-methyl·isoxaflutole 26%SC to maize and weeds were higher than 17.The results show that isoxaflutole and thiencabazone-methyl·isoxaflutole have strong herbicidal activity at low dose and are safe to maize.They are ideal substitutes of soil applied herbicides in maize field.
作者
滕春红
岳建超
马艺倩
冯曦茹
王博
顾元琳
陶波
TENG Chunhong;YUE Jianchao;MA Yiqian;FENG Xiru;WANG Bo;GU Yuanlin;TAO Bo(College of Agriculture,Northeast Agricultural University,Harbin 150030,China)
出处
《植物保护》
CAS
CSCD
北大核心
2021年第4期293-297,共5页
Plant Protection
基金
国家重点研发计划(2017YFD0201803)。
关键词
异噁唑草酮
噻酮·异噁唑
除草活性
玉米
安全性
isoxaflutole
thiencabazone-methyl·isoxaflutole
herbicidal activity
maize
safety
