稻草净防除稻田杂草试验

稻草净亩用５０￣１００克对稻田眼子菜、鸭舌草、甲叶薄等阔叶杂草有很好的防效，并用明显的增产作用。大田移载后１５天一次施药可以控制水稻田整个生育期的阔叶杂草。     

抛秧稻田杂草发生与化除技术研究初报

抛秧田杂草不但种类多，危害重，而且化除难度大，技术要求高，据１９９３－１９９５年的试验、示范结果证明，一般草害田，掌握在抛栽后１０－１５天，每公顷用５０％二氯喹啉酸３７５－４５０克加１０％苄嘧黄隆１５０－２２５克，采用喷雾或毒土法防治一次，对稗草和多种阔叶草的防效一般可稳定在９０－９３％左右，并且可使亩产增加２成左右，但多草田和漏水田，则应通过二次用药或提高药剂用量的方法加以解决。     

28%乙.嗪可湿性粉剂防除大豆田杂草

乙。嗪可湿性粉剂虽一次性大豆田除草剂。试验结果表明，亩用有效剂量６０克，除草效果达９０％以上，对大豆安全，扩大了杀草谱，可防除整个大豆生长期杂草。     

麦田草害及其化学防除

麦田杂草不仅种类多而且适应性广，抗逆性强，严重威胁着大，小麦生产。麦田化学除草，首先要正确选用对口除草剂品种，提高整地和施药质量。     

Multi-objective optimization with artificial weed colonies

Invasive Weed Optimization (IWO) was recently proposed as a simple but powerful metaheuristic algorithm for real parameter optimization. IWO draws inspiration from the ecological process of weeds colonization and distribution and is capable of solving general multi-dimensional, linear and nonlinear optimization problems with appreciable efficiency. This article extends the basic IWO for tackling multi-objective optimization problems that aim at achieving two or more objectives (very often conflicting) simultaneously. The concept of fuzzy dominance has been used to sort the promising candidate solutions at each iteration. The new algorithm has been shown to be statistically significantly better than some state of the art existing evolutionary multi-objective algorithms, namely NSGAIILS, DECMOSA-SQP, MOEP, Clustering MOEA, GDE3, and MOEADGM on a 12-function test-suite (including both unconstrained and constrained problems) from the IEEE CEC (Congress on Evolutionary Computation) 2009 competition and special session on multi-objective optimization algorithms. The following performance metrics were considered: IGD, Spacing, and Minimum Spacing. Our experimental results suggest that IWO holds immense promise to appear as an efficient metaheuristic for multi-objective optimization.     

氟酮磺隆对小麦田禾本科杂草的活性

氟酮磺隆作为土壤处理剂,能有效的抑制看麦娘、野燕麦、雀麦,对节节麦也有一定抑制作用;作为茎叶处理剂,对麦田禾本科杂草的活性随着叶龄增加而降低,在看麦娘、野燕麦和雀麦3叶期以前和节节麦1．5叶期以前使用的除草效果好。对照药剂精噁唑禾草灵无土壤处理活性,苗后茎叶处理对雀麦和节节麦也无明显活性。     

霸草灵防除麦田阔叶杂草效果试验初报

试验表明:(1) 霸草灵杀草谱广,速效性好,2%霸草灵SC 300 ml/hm2处理对猪殃殃、婆婆纳、泽漆、繁缕等很敏感;十字花科的播娘蒿、荠菜株死亡率较低,但抑止生长作用较大;对野老鹳草则基本无效。(2) 在小麦4叶期喷2%霸草灵SC300~600 ml/hm2对小麦安全,对后茬也无影响。(3) 冬前在杂草2~4叶、基本出齐时喷2%霸草灵SC300 ml/hm2,对婆婆纳等的防效可达100%,对荠菜的株防效为44%左右,鲜重防效可达77%左右。     

5种土壤处理除草剂对半夏田杂草防除效果

[目的]草害是制约贵州半夏产业发展的重要因素之一.生产上主要依靠人工除草方式,其除草成本高;化学除草是降低半夏田除草成本的有效措施,但生产上供选择的除草剂品种单一;试验旨在提供更多除草剂品种供半夏田选择应用.[方法]选用5种土壤处理除草剂,按照随机区组设计进行田间药效试验,在半夏播后苗前进行土壤喷雾处理.[结果]50％...     

吡氟酰草胺2种混配剂防除覆膜蒜田杂草研究

将吡氟酰草胺原药配制成60%吡氟酰草胺·扑草净WP和60%吡氟酰草胺·乙草胺WP两种混配剂,每种混配剂分设有效成分720、900、1350 g/hm~2三个剂量,防除覆膜蒜田杂草。试验结果为吡氟·扑的株防效和鲜重防效为93.70%～99.17%和92.42%～99.72%,吡氟·乙的株防效和鲜重防效为91.96%～96.17%和85.11%～97.12%,除草效果都好于配伍单剂扑草净和乙草胺,且残效期长,对作物大蒜安全,增产效益显著。     

10%单嘧磺酯WP防除春小麦田杂草及对小麦安全性研究

10%单嘧磺酯WP适宜于春小麦3～5叶龄期(双子叶杂草2～4叶龄期)每公顷225～300g对水450kg茎叶处理,对双子叶杂草的防效达80%以上,对禾本科野燕麦有一定的防效,对小麦安全,灭草后增产显著。以藜或多年生杂草为主的田块,应与其它除草剂混配使用。