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。     

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。     

苜蓿田杂草茎口叶处理药剂筛选试验报告

对5％普施特AS、25％苯达松AS、50％高特克SE、15％精稳匀得EC、6．9％威霸EW等10种除草剂及其混用在苜缩中进行了药效试验。除草效果达到80．7％－98．2％，增产效果显著。     

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.     

Impact of the wastedump ecosystem (phosphate ore dressing manufacture,Aswan, Egypt) on the surrounding environment

This study deals with evaluation of the impact of wastedump resulting from the phosphate ore dressing near the Mahamead Village (120 km north Aswan City), Aswan Governorate, Egypt, on the surrounding environment. The results indicate that the waste dump ecosystem contains elevated concentrations of Ca, Na, Cl～, SO^” and HCOJ as well as, relatively high concentrations of Fe, Mn, Pb and Cd. High pH (8.28–8.97) in all samples minimized the adverse effect on the soil and groundwater. The aerial parts of emergent weeds growing in the waste dump which used in this region as animal feed accumulate permissible limits of toxic metals. The wastedump can be a potential hazard to health and wildlife, if drainage from this dump (waste water) enters the Nile river.     

新型除草剂精草铵膦对柑橘园杂草的田间防效

[目的]为评价新型除草剂精草铵膦对柑橘园杂草的田间防效。[方法]采用定向茎叶喷雾法,分别于2018、2019年进行了10%精草铵膦钠盐可溶液剂的田间小区试验。[结果]10%精草铵膦钠盐可溶液剂570~870 g a.i./hm^2对柑橘园阔叶杂草、禾本科杂草均具有较好的防效,药后30 d,总草株防效和鲜重防效分别为94.9%~98.8%、95.0%~98.5%,与对照药剂200 g/L草铵膦水剂1400 g a.i./hm^2处理相当。[结论]精草铵膦可作为防治柑橘园或非耕地杂草的高效低用量药剂,具有较好的推广应用前景。     

68％吡嘧·苯噻酰WP防除移栽水稻杂草试验总结

为探讨68％吡嘧·苯噻酰WP在水稻田的应用前景,于2007--2008年在湖南、浙江、河北、辽宁、黑龙江等地进行了两年布点登记试验。试验结果表明,68％吡嘧·苯噻酰WP具有安全、广谱、增产显著的特点,能有效防除水稻稗草、稻稗、三棱草、野荸荠、鸭舌草、水莎草等单双子叶杂草。