Chemical control is presently the most cost-effective means to control kudzu;however, some of the herbicides labeled for kudzu control have substantial non-target toxicity, poor selectivity, high cost, long soil persi...Chemical control is presently the most cost-effective means to control kudzu;however, some of the herbicides labeled for kudzu control have substantial non-target toxicity, poor selectivity, high cost, long soil persistence, high soil mobility and/or high use rates. The present study evaluated other herbicides for efficacy in suppressing aboveground kudzu biomass in replicated field trials at three sites over two years. A single application of aminopyralid, triclopyr or metsulfuron resulted in at least 90% kudzu suppression in the following season at two locations. After a second year of treatment those herbicides and fluroxypyr produced at least 90% kudzu suppression, and 100% kudzu control was reached on some test plots. Glyphosate, glufosinate and mesotrione were less effective in controlling kudzu. Given the rapid growth potential of kudzu, complete eradication should be pursued. None of the herbicides evaluated in the present study could reliably achieve eradication of mature kudzu with two applications, so additional control efforts would be required.展开更多
为探究粉葛(Pueraria montana var. thomsonii)对干旱胁迫的生理响应机制,本研究以粉葛植株为试验材料,通过盆栽形式和自然耗水与人工补水相结合的控水方法,分别设定了3个不同水分梯度。结果表明:干旱胁迫会抑制粉葛生长,叶片相对含水...为探究粉葛(Pueraria montana var. thomsonii)对干旱胁迫的生理响应机制,本研究以粉葛植株为试验材料,通过盆栽形式和自然耗水与人工补水相结合的控水方法,分别设定了3个不同水分梯度。结果表明:干旱胁迫会抑制粉葛生长,叶片相对含水量和根系活力降低,叶绿素总含量显著增加;超氧化物歧化酶(SOD)和过氧化物酶(POD)酶活性均得到提高,过氧化氢酶(CAT)酶活性在中度干旱胁迫下逐渐增加,重度干旱胁迫下CAT酶活性逐渐降低;叶肉细胞相对电导率显著增加,渗透调节物质浓度增加;总黄酮含量显著升高。单叶面积与POD、叶绿素a、叶绿素b、总叶绿素含量和可溶性蛋白含量呈现显著负相关,POD和脯氨酸与总黄酮含量显著正相关。通过相关性分析与主成分分析可知,POD、相对含水量、SOD、类胡萝卜素、可溶性蛋白、CAT和总黄酮在干旱胁迫下表现为较敏感的生理指标。本研究结果可为粉葛节水及优质栽培的生理机制提供理论基础。展开更多
文摘Chemical control is presently the most cost-effective means to control kudzu;however, some of the herbicides labeled for kudzu control have substantial non-target toxicity, poor selectivity, high cost, long soil persistence, high soil mobility and/or high use rates. The present study evaluated other herbicides for efficacy in suppressing aboveground kudzu biomass in replicated field trials at three sites over two years. A single application of aminopyralid, triclopyr or metsulfuron resulted in at least 90% kudzu suppression in the following season at two locations. After a second year of treatment those herbicides and fluroxypyr produced at least 90% kudzu suppression, and 100% kudzu control was reached on some test plots. Glyphosate, glufosinate and mesotrione were less effective in controlling kudzu. Given the rapid growth potential of kudzu, complete eradication should be pursued. None of the herbicides evaluated in the present study could reliably achieve eradication of mature kudzu with two applications, so additional control efforts would be required.
文摘为探究粉葛(Pueraria montana var. thomsonii)对干旱胁迫的生理响应机制,本研究以粉葛植株为试验材料,通过盆栽形式和自然耗水与人工补水相结合的控水方法,分别设定了3个不同水分梯度。结果表明:干旱胁迫会抑制粉葛生长,叶片相对含水量和根系活力降低,叶绿素总含量显著增加;超氧化物歧化酶(SOD)和过氧化物酶(POD)酶活性均得到提高,过氧化氢酶(CAT)酶活性在中度干旱胁迫下逐渐增加,重度干旱胁迫下CAT酶活性逐渐降低;叶肉细胞相对电导率显著增加,渗透调节物质浓度增加;总黄酮含量显著升高。单叶面积与POD、叶绿素a、叶绿素b、总叶绿素含量和可溶性蛋白含量呈现显著负相关,POD和脯氨酸与总黄酮含量显著正相关。通过相关性分析与主成分分析可知,POD、相对含水量、SOD、类胡萝卜素、可溶性蛋白、CAT和总黄酮在干旱胁迫下表现为较敏感的生理指标。本研究结果可为粉葛节水及优质栽培的生理机制提供理论基础。