Tank-mix adjuvant has the potential to improve the weed control efficacy of post-emergence herbicides. In order to study the synergistic effect of adjuvant, the effects of different rates of fomesafen alone or applied...Tank-mix adjuvant has the potential to improve the weed control efficacy of post-emergence herbicides. In order to study the synergistic effect of adjuvant, the effects of different rates of fomesafen alone or applied methylated soybean oil adjuvant（MSO） were sprayed on redroot pigweed, abutilon and black nightshade under greenhouse condition. The results showed that fomesafen had different performance on the three weeds, and MSO adjuvant could effectively increase the control. The nightshade control was lower than other two weeds with all the fomesafen doses from 131.25 to 506.25 ga.i. · hm-2 with or without adjuvant. The control of abutilon was between the black nightshade and the redroot pigweed, and had better control at 375 ga.i. · hm-2 with adjuvant or 506.25 ga.i. · hm-2 alone or with adjuvant respectively. The results indicated that mixing adjuvant with fomesafen improved the control on weeds, especially at the low rate. Black nightshade was more difficult to control. The redroot pigweed had the most susceptibility to fomesafen alone or with adjuvant.展开更多
In this experiment,the effects of 13 kinds of herbicides( or mixtures) on the control of two kinds of weeds were studied by pot cultivation with the broadleaf weed Malachium aquaticum L. and Gramineae weed Poa annua L...In this experiment,the effects of 13 kinds of herbicides( or mixtures) on the control of two kinds of weeds were studied by pot cultivation with the broadleaf weed Malachium aquaticum L. and Gramineae weed Poa annua L. as the materials. The results showed that the herbicide MCPA-Na had the best and fastest control effect on M. aquaticum L.,and all the M. aquaticum L. died 7 d after treatment;it was followed by the other four herbicides including MCPA-Na + clethodim,MCPA-Na + quizalofop-p-ethyl,bentazon and nicosulfuron·atrazine,and all the M. aquaticum L. died 14 d after treatment. Atrazine was the best herbicide to control Gramineae weeds,followed by nicosulfuron·atrazine,and mesotrione·nicosulfuron·atrazine. The study on the application of field herbicide found that four herbicides including atrazine,mesotrione·nicosulfuron·atrazine,nicosulfuron·atrazine and bentazon had better control effect on weeds. The best herbicide for flax field was MCPA-Na + clethodim,followed by MCPA-Na and MCPA-Na + quizalofop-p-ethyl. The optimized herbicides and combinations had no harmful effects on the growth of corn and flax.展开更多
According to the ecological environment and current status of weeds in northern Hebei Province,five herbicides were screened out to test weed control efficacy and crop safety. The result showed that Gaolaotou was more...According to the ecological environment and current status of weeds in northern Hebei Province,five herbicides were screened out to test weed control efficacy and crop safety. The result showed that Gaolaotou was more economic and effective when spraying in soil on the sowing day at the dose of 2 250 m L/hm;.展开更多
为探究喹草酮防控亚麻田菟丝子的可行性,研究采用茎叶喷雾法,通过室内生物活性测定与田间药效试验相结合的方法,系统评估该药剂对亚麻的安全性以及对亚麻田恶性杂草菟丝子的防控效果和对亚麻产量的潜在影响。室内试验结果显示:喹草酮对...为探究喹草酮防控亚麻田菟丝子的可行性,研究采用茎叶喷雾法,通过室内生物活性测定与田间药效试验相结合的方法,系统评估该药剂对亚麻的安全性以及对亚麻田恶性杂草菟丝子的防控效果和对亚麻产量的潜在影响。室内试验结果显示:喹草酮对菟丝子活性高,GR_(50)和GR_(90)分别为11.96、109.75 g a.i./hm^(2),与对照药剂仲丁灵相当;对亚麻的GR_(10)为246.39 g a.i./hm^(2);喹草酮对菟丝子的选择性系数为2.245,表明喹草酮在试验剂量范围内对亚麻相对安全。田间试验结果显示:喹草酮用量为100~200 g a.i./hm^(2)时,对亚麻无药害;其用量为200 g a.i./hm^(2)、药后30 d时,对亚麻田杂草菟丝子的藤茎防效为96.61%、鲜重防效为98.89%,与对照药剂相当,并且对亚麻株高、籽粒产量、原茎产量等指标均表现出促进作用。利用喹草酮防控亚麻田菟丝子时,应严格控制用量,根据杂草发生规律科学用药,谨防药害发生。展开更多
基金Supported by the Postdoctoral Grant of Heilongjiang Academy of Agricultural Sciences(LRB10-2446)the Doctoral Foundation of Northeast Agricultural University(2010RCB16)the Science and Technology Project of Heilongjiang Education Committee(12521034)
文摘Tank-mix adjuvant has the potential to improve the weed control efficacy of post-emergence herbicides. In order to study the synergistic effect of adjuvant, the effects of different rates of fomesafen alone or applied methylated soybean oil adjuvant（MSO） were sprayed on redroot pigweed, abutilon and black nightshade under greenhouse condition. The results showed that fomesafen had different performance on the three weeds, and MSO adjuvant could effectively increase the control. The nightshade control was lower than other two weeds with all the fomesafen doses from 131.25 to 506.25 ga.i. · hm-2 with or without adjuvant. The control of abutilon was between the black nightshade and the redroot pigweed, and had better control at 375 ga.i. · hm-2 with adjuvant or 506.25 ga.i. · hm-2 alone or with adjuvant respectively. The results indicated that mixing adjuvant with fomesafen improved the control on weeds, especially at the low rate. Black nightshade was more difficult to control. The redroot pigweed had the most susceptibility to fomesafen alone or with adjuvant.
基金Supported by Open Fund Project of Hunan Provincial Department of Education(15K067)Hunan Graduate Research Innovation Project(CX2018B801)
文摘In this experiment,the effects of 13 kinds of herbicides( or mixtures) on the control of two kinds of weeds were studied by pot cultivation with the broadleaf weed Malachium aquaticum L. and Gramineae weed Poa annua L. as the materials. The results showed that the herbicide MCPA-Na had the best and fastest control effect on M. aquaticum L.,and all the M. aquaticum L. died 7 d after treatment;it was followed by the other four herbicides including MCPA-Na + clethodim,MCPA-Na + quizalofop-p-ethyl,bentazon and nicosulfuron·atrazine,and all the M. aquaticum L. died 14 d after treatment. Atrazine was the best herbicide to control Gramineae weeds,followed by nicosulfuron·atrazine,and mesotrione·nicosulfuron·atrazine. The study on the application of field herbicide found that four herbicides including atrazine,mesotrione·nicosulfuron·atrazine,nicosulfuron·atrazine and bentazon had better control effect on weeds. The best herbicide for flax field was MCPA-Na + clethodim,followed by MCPA-Na and MCPA-Na + quizalofop-p-ethyl. The optimized herbicides and combinations had no harmful effects on the growth of corn and flax.
基金Supported by China Agricultural Industry Research System(CARS-06-13.5-A10)Key Technology Innovation and Demonstration for Development of Millet Industry(F16R03)Key Technology for Breakthrough Varieties Breeding and Quality Enhancement of Foxtail Millet and Minor Cereal Crops(F17R01)
文摘According to the ecological environment and current status of weeds in northern Hebei Province,five herbicides were screened out to test weed control efficacy and crop safety. The result showed that Gaolaotou was more economic and effective when spraying in soil on the sowing day at the dose of 2 250 m L/hm;.
文摘为探究喹草酮防控亚麻田菟丝子的可行性,研究采用茎叶喷雾法,通过室内生物活性测定与田间药效试验相结合的方法,系统评估该药剂对亚麻的安全性以及对亚麻田恶性杂草菟丝子的防控效果和对亚麻产量的潜在影响。室内试验结果显示:喹草酮对菟丝子活性高,GR_(50)和GR_(90)分别为11.96、109.75 g a.i./hm^(2),与对照药剂仲丁灵相当;对亚麻的GR_(10)为246.39 g a.i./hm^(2);喹草酮对菟丝子的选择性系数为2.245,表明喹草酮在试验剂量范围内对亚麻相对安全。田间试验结果显示:喹草酮用量为100~200 g a.i./hm^(2)时,对亚麻无药害;其用量为200 g a.i./hm^(2)、药后30 d时,对亚麻田杂草菟丝子的藤茎防效为96.61%、鲜重防效为98.89%,与对照药剂相当,并且对亚麻株高、籽粒产量、原茎产量等指标均表现出促进作用。利用喹草酮防控亚麻田菟丝子时,应严格控制用量,根据杂草发生规律科学用药,谨防药害发生。
