1) biennial weed
二年生杂草
2) perennial weed
多年生杂草
1.
Summary on dormancy mechanisms and regulation of vegetative reproduction organ of perennial weeds
多年生杂草休眠及其调控研究概述
2.
The investigation was conducted in the system of rice-wheat rotation in Yizheng, Jiangsu Province to determine the category, distribution, propagation and germination of the perennial weeds.
对江苏省仪征市连年稻麦两熟轮作稻田土壤多年生杂草种子库中杂草种类、繁殖方式、分布及萌发等特性进行了系统调查研究。
3) annual weeds
一年生杂草
1.
Field trials showed that 25% pyrazosulfuron- mefenacet- ethyl EB 185￣370g/667m2 could control the annual weeds in rice fields such as barnyardgrass, difformed galingale and so on.
吡嘧泡腾片剂185￣370g/667m2能有效防除水稻移栽田稗草、异型莎草等一年生杂草,药后28d对稗草、异型莎草的株防效和鲜重防效均在90%以上。
2.
0kg/hm 2,it affects a little for the growth of the potatoes and it can prevent and get rid of the annual weeds like Digitaria sanguinal, Setaria viridis, Echinochloa crusgali,Amaranthus retroflexus,Chenopdium album and so on.
0kg/hm2 范围内 ,对马铃薯的生长发育影响较小 ,可有效地防除马唐、狗尾草、稗草、反枝苋、藜等一年生杂草。
3.
It had good prevention and elimination effect on annual weeds in corn field at the recommended dosage.
8%,对一年生杂草防效显著。
4) winter annual weeds
越年生杂草
6) annual broadleaf weeds
一年生阔叶杂草
1.
Field efficacy trials indicated that fluroxypyr-methyl 200 g/L EC showed a good control effect against annual broadleaf weeds in wheat field at 750 to 1 050 mL/hm2.
田间试验结果表明,200g/L氯氟吡氧乙酸乳油750～1050mL/hm2能有效地防除小麦田一年生阔叶杂草。
补充资料：二年生杂草
分子式：
CAS号：
性质：需要度过两个完整的夏季才能完成其生育周期，寿命超过一年但不超过二年的杂草。如秋季发芽、出苗，则需生育至第三年才能开花、结实。通常第一年发育庞大的根系，积累营养物质并形成叶簇，次年春季从根颈处抽苔，夏季开花、结实，种子繁殖。飞廉(Carduus crispus L.)、黄花蒿(Artemisia annua L.)、益母草(Leonurus heterophyllus Sweet.)等杂草属于该类。
CAS号：
性质：需要度过两个完整的夏季才能完成其生育周期，寿命超过一年但不超过二年的杂草。如秋季发芽、出苗，则需生育至第三年才能开花、结实。通常第一年发育庞大的根系，积累营养物质并形成叶簇，次年春季从根颈处抽苔，夏季开花、结实，种子繁殖。飞廉(Carduus crispus L.)、黄花蒿(Artemisia annua L.)、益母草(Leonurus heterophyllus Sweet.)等杂草属于该类。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条