共查询到20条相似文献,搜索用时 93 毫秒
1.
2.
3.
<正>草甘膦是我国大吨位的灭生性除草剂,高效、广谱,深受用户青睐。为了方便使用和运输,华星化工股份有限公司开发出了高含量可溶性粒剂即免耕乐60%草甘膦SG,免耕乐是主 相似文献
4.
通过意比西二甲戊灵乳油在棉田防除杂草的应用试验,结果表明,试验药剂对棉花生长安全,对一年生禾本科杂草及部分阔叶杂草的防效显著,持效期较长。 相似文献
5.
在室内进行芳樟醇、薄荷酮、丁香酚和印楝素对荔枝蒂蛀虫成虫产卵驱避试验,同时研究化合物对荔枝蒂蛀虫卵的孵化和蛹的羽化过程的影响。在同一浓度下,对荔枝蒂蛀虫成虫产卵的驱避效果依次是丁香酚>芳樟醇>薄荷酮>印楝素。对荔枝蒂蛀虫卵的调控试验表明:0.3%印楝素对荔枝蒂蛀虫卵不具有熏杀作用,而其触杀作用最好;其他化合物对荔枝蒂蛀虫卵均具一定的熏杀和毒杀作用;随着化合物浓度的增加,熏杀和毒杀作用增强。对荔枝蒂蛀虫蛹的毒杀作用试验表明:用纯化合物处理蛹时,蛹茧立刻胀起,边缘皱缩,2天后观察,蛹体发黑,干缩死亡;稀释后的化合物处理蛹,蛹死亡率较低,仅为20.00%~26.70%。结果表明,芳樟醇、薄荷酮、丁香酚和印楝素对荔枝蒂蛀虫的不同虫态的发生均具有一定的抑制作用。 相似文献
6.
15%麦极防除小麦禾本科杂草药效试验 总被引:1,自引:0,他引:1
通过田间药效试验,明确15%麦极WP对当地主要禾本科杂草的防效及对作物的安全性,确定适合当地生产条件的最佳施药剂量及施药技术。 相似文献
7.
<正>本文介绍了50%行行清(嘧苯胺磺隆)水分散粒剂进行几种不同药剂处理水稻田杂草对比试验,结果表明:50%行行清(嘧苯胺磺隆)水分散粒剂防治水稻田杂草的安全性好,行行清50%水分散粒剂+40%乙草胺可湿性粉剂防除移栽水稻田杂草药效显著,对禾本科、莎草科和阔叶杂草均能有效控制,其综合防除效果达98.9%以上。 相似文献
8.
33%意比西乳油(又名33%二甲戊灵)为意大利易比西公司近年来开发生产的一种土壤封闭苗前除草剂,可有效防除棉田灰藜、野苋菜、稗子等一年生禾本科杂草和阔叶草。该制剂具有杀草谱广、对棉花安全、活性高、耐雨水冲刷、持效期长等特点。本试验于2014年选择33%意比西乳油进行防除棉田灰黎、稗子草药效试验,结果表明,该药剂对棉花生长安全,对一年生禾本科杂草及部分阔叶杂草的防效显著,持效期较长。 相似文献
9.
10.
11.
12.
13.
直播稻田杂草发生与防除研究进展 总被引:4,自引:0,他引:4
随着水稻直播技术的推广,稻田出现杂草发生严重、除草剂用量加大等问题,而杂草发生种类、优势种群出现多样化,增加了杂草对除草剂的抗性,导致杂草防除困难,影响了直播稻的丰产与稳产;同时直播稻田除草剂的过量使用带来的生产安全性问题值得关注。本文从杂草发生种类、数量及成灾时期、发生差异性(稻作区域、种植方式、直播方式与播种期)、生态学效应及对直播稻生长发育影响等方面综述了直播稻田杂草的发生特性,分析了不同种类杂草的防除途径(化学除草、耕种制度与栽培措施),提出我国目前在直播稻田杂草发生与防除方面研究存在的问题,并对未来直播稻田杂草防治的发展方向进行探讨与展望,旨在提高我国直播稻田杂草的防除效果,促进直播稻生产的轻简高效发展。 相似文献
14.
15.
16.
44%谷友WP对谷田杂草的防除及其对谷子产量的影响 总被引:7,自引:2,他引:7
为了解决44%谷友WP在推广中的药效不佳或药害问题,采用四因素四水平和三因素二水平的正交试验和新复极差法统计分析,针对施药剂量、喷灌水量、整地质量、土壤墒情等影响因素进行了44%谷友(单嘧?扑灭)WP防控杂草及其对谷子产量影响的比较试验。结果表明:7个实验因素对44%谷友WP防控杂草效果均具有重要的影响,其中,施药剂量、灌溉水量、整地质量、土壤墒情还是影响谷子产量的最重要因素。根据谷子产量和经济效益,确定了44%谷友WP经济、安全、高效防控谷田杂草技术的最优方案:44%谷友WP的剂量为1800 g/hm2,在播种后出苗前进行土壤处理;耕耙地要坚实;土壤含水量要达到15%;药后不进行喷灌;在45天高药效持续期内能有效控制谷田杂草,尤其是双子叶杂草。 相似文献
17.
The presence of the fish species Cyprinus carpio L., Tilapia nilotica L. and Puntius gonionotus Bleeker in irrigated paddy fields resulted in a reduction of the numbers of sedges and broadleaved weeds at low water levels around 5 cm. On the contrary, weed growth was enhanced at higher water levels. Similar results were obtained for the percentage area covered and the species Marsilea crenata . At low water levels the number of uprooted weeds in rice-fish fields was markedly increased if compared to control fields. This indicates that fish prefer shallow areas of rice fields with more abundant food supplies as a feeding place. In rice-fish fields the water was turbid on 77.8 % of the test plots (1 m2 ) compared to only 47.4 % on the control fields. The findings are explained by the combined action of a 'fertilizing effect' and a 'feeding effect', both of which are due to fish. 相似文献
18.
A. F. Ibrahim H. R. El-Wekjl Z. R. Yehia Sh. A. Shaban 《Journal of Agronomy and Crop Science》1988,160(5):319-324
Two field experiments were carried out during 1984 and 1985 seasons at the Farm of Shandaweel Agric. Res. Station, A. R. C, Ministry of Agric. (Egypt), to study the effect of five herbicides applied as a single or in tank mixtures as well as hoeing treatment on sesame plants and dominated annual weeds under Upper Egypt growing conditions. The herbicides alachlor at 2.304, pendimethalin at 2.040, linuron at 1.200, diuron at 0.960 and prometryn at 1.920 kg a.i./ha were applied preemergence as a single herbicides, as well as alachlor and pendimethalin combined with linuron, diuron or prometryn at the same rates. Two checks were included, one was left without weed removal, while the other was hand-hoed.
Pendimethalin at 2.040 applied alone or in mixtures with linuron at 1.200 or with diuron at 0.960 kg a.i./ha gave the best grass weed control, while excellent effectiveness against annual broad-leaves was obtained by linuron at 1,200 and diuron at 0.960 kg a.i./ha alone or in mixtures with pendimethalin at 2.040 kg a.i./ha. Whereas, pendimithalin at 2.040 applied alone or in tank mixtures with linuron at 1.200 or with diuron at 0.960 kg a.i./ha gave the best control for total annual weeds and higher seed yield of sesame as well as other yield contributing characters. 相似文献
Pendimethalin at 2.040 applied alone or in mixtures with linuron at 1.200 or with diuron at 0.960 kg a.i./ha gave the best grass weed control, while excellent effectiveness against annual broad-leaves was obtained by linuron at 1,200 and diuron at 0.960 kg a.i./ha alone or in mixtures with pendimethalin at 2.040 kg a.i./ha. Whereas, pendimithalin at 2.040 applied alone or in tank mixtures with linuron at 1.200 or with diuron at 0.960 kg a.i./ha gave the best control for total annual weeds and higher seed yield of sesame as well as other yield contributing characters. 相似文献
19.
20.
为明确27%二甲戊灵·砜吡草唑乳油土壤封闭处理对棉花田一年生杂草的防效及对棉花的安全性,采用随机区组的试验方法进行田间药效试验。结果表明,27%二甲戊灵·砜吡草唑乳油对棉花田主要杂草马唐、牛筋草、马齿苋、反枝苋均有较好的防除效果,在有效成分用量为607.5、810、1012.5、1620 g a.i./hm2条件下,药后40天总鲜种防效为86.1%、91.7%、96.7%、99.3%,防治效果较好,棉花的增产率为26.04%~28.87%。因此,27%二甲戊灵·砜吡草唑乳油可采用土壤喷雾防除棉田杂草,对棉花安全,推荐剂量为607.5~1012.5 g a.i./hm2。 相似文献