防除甜高粱田杂草的除草剂筛选

doi:10.16035/j.issn.1001-7283.2018.06.025

Abstract

Abstract:

The weeds often occur in field of sweet sorghum, which seriously influences the economic efficiency.There are few reports on the chemical weeding of sweet sorghum at home and abroad. In order to screen a safe and high efficient herbicide to control weeds in sweet sorghum field, the variety of Suketian 1 was used as the test plant material, and the single agent or mixture herbicides of pendimethalin, atrazine, methoprolopoxamine, quinclorac, acetochlor, fluroxypyr and quintrione was applied before emergence and postemergence of Suketian 1. Results showed that after sowing and before emergence, 33% pendimethali 2 250mL/hm ²+38% atrazine 2 250mL/hm ² had best control effects on weed numbers which reached 99.7% and were safe to sweet sorghum. After emergence in 4-5 leaf stage, 20% quintrione 2 000mL/hm ²+38% atrazine 5 000mL/hm ² had best control effects on weed numbers and fresh weight which reached 99.2% and 99.5%, respectively, which were safe to sweet sorghum. The above two kinds of agents can be used as an ideal choice for weed control of sweet sorghum.

Key words: Sweet sorghum, Herbicide, Screening, Control effect

Li Chunhong,Lu Xianglong,Zhang Peitong,Su Yanjing,Wang Yiming,Guo Wenqi,Yin Jianmei,Han Xiaoyong,Wang Li,Huo Enjie. Screening Herbicides to Control Weeds for Sweet Sorghum[J].Crops, 2018, 34(6): 158-161.

Figures/Tables 5

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处理Treatment	除草剂及用量Herbicide and its dosage
播后苗前Before emergence after sowing	①90%乙草胺1 350mL/hm²+38%莠去津2 250mL/hm²
	②33%二甲戊灵2 250mL/hm²+38%莠去津2 250mL/hm²
	③96%精-异丙甲草胺675mL/hm²+38%莠去津2 250mL/hm²
	④96%精-异丙甲草胺1 350mL/hm²
	⑤对照
苗后After emergence	⑥75%二氯喹啉酸450g/hm²+50%使它隆900mL/hm²
	⑦20%二氯喹啉草酮3 000mL/hm²
	⑧20%二氯喹啉草酮2 000mL/hm²+38%莠去津5 000mL/hm²
	⑨对照

处理 Treatment	出苗后3d 3 days after emergence			出苗后20d 20 days after emergence
处理 Treatment	药害等级 Phytotoxicity grading	叶色 Leaf colour	出苗率(%) Emergence rate	药害等级 Phytotoxicity grading	叶色 Leaf colour	株高(cm) Plant height
①	–	绿色	97.9a	–	绿色	22.7a
②	–	绿色	98.2a	–	绿色	21.3a
③	–	绿色	99.1a	–	绿色	22.2a
④	+	10%植株叶片有少量褐色的斑点	97.3a	–	绿色	20.9a
⑤	–	绿色	99.0a	–	绿色	17.4b

处理 Treatment	阔叶杂草Broadleaf weeds		禾本科杂草Gramineous weeds		总杂草Total weeds
处理 Treatment	每m²株数 Plants per m²	防效(%) Control effect	每m²株数 Plants per m²	防效(%) Control effect	每m²株数 Plants per m²	防效(%) Control effect
①	4.7	69.3c	2.3	99.6a	7.0	98.9a
②	0.0	100.0a	2.0	99.7a	2.0	99.7a
③	1.7	88.9b	14.9	97.7a	16.6	97.5a
④	1.4	90.8b	3.6	99.4a	5.0	99.2a
⑤	15.3	-	646.0	-	661.3	-

处理 Treatment	药害等级 Phytotoxicity grading	叶色 Leaf colour	株高(cm) Plant height
⑥	–	叶绿,正常	54.2b
⑦	–	叶绿,正常	53.1b
⑧	–	叶绿,正常	57.8a
⑨	–	叶绿,正常	50.9c

处理Treatment	阔叶杂草Broadleaf weeds				禾本科杂草Gramineous weeds				总杂草Total weeds
处理Treatment	每m²株数 Plants per m²	鲜重(g/m²) Fresh weight	株防效(%) Number control effect	鲜重防效(%) Fresh weight control effect	每m²株数 Plants per m²	鲜重(g/m²) Fresh weight	株防效(%) Number control effect	鲜重防效(%) Fresh weight control effect	株防效(%) Number control effect	鲜重防效(%) Fresh weight control effect
⑥	1.5	1.6	89.3b	90.0b	57.7	66.2	75.2b	73.9b	76.0	70.7
⑦	6.1	7.6	55.7c	53.9c	83.9	66	63.9c	69.3c	63.5	68.2
⑧	0.8	0.1	94.6a	99.3a	1.2	1.1	99.5a	99.5a	99.2	99.5
⑨	13.8	16.4	-	-	232.5	214.8	-	-	-	-

Screening Herbicides to Control Weeds for Sweet Sorghum

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