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用 30 %多·福·克悬浮种衣剂对大豆种子进行包衣 ,防治大豆苗期主要病虫害。田间试验结果表明 :对大豆根腐病、蚜虫、蓟马等病虫害防治的持效期在 6 0d以上 ,对孢囊线虫病防治持效期在 45d以上 相似文献
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三唑酮防治小麦条锈病的持效期很长。幼苗第1叶喷施有效成分浓度400μg/mL以上的药液,持效期55d以上,可有效地保护第2叶至第6叶或更高叶位的叶片;喷施200μg/mL药液可保护前4个叶片,持效期34d上;100μg/mL三唑酮对第2叶有较好的保护作用;成株期喷药,用药浓度100μg/mL以上,持效期56d以上。为保证和提高防治效果,必须把握喷药时机,适期早喷。 相似文献
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13种杀螨剂对柑桔红蜘蛛田间防效评价 总被引:1,自引:0,他引:1
对13种杀螨剂进行了防治柑桔红蜘蛛的田间药效试验,结果表明:速效性好且持效期长的杀螨剂有螺螨酯、三唑锡、苯丁锡、溴螨酯和克螨特,药后1 d的防效达89%以上,药后10 d的防效为85.84%~96.66%,药后15 d的防效为76.66%~98.12%,它们对柑桔红蜘蛛的有效控制期在15 d以上,其中以螺螨酯的防效最好、持效期最长;哒螨灵和双甲脒的速效性较好但持效期一般,药后1~10 d的防效为87.53%~90.48%.药后15 d的防效下降到66.80%以下;噻螨酮和阿维菌素的速效性一般但持效期较长,药后1 d的防效为80.09%~86.87%.药后10 d的防效为90.81%~93.45%,药后15 d的防效为80%左右;四螨嗪和氟虫脲的速效性较差,持效期一般;唑螨酯的速效性和持效期都不突出;甲氰菊酯对柑桔红蜘蛛的控制作用最差,不宜使用. 相似文献
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新一佳与锐劲特、锐劲特与敌敌畏混用防治稻田灰飞虱见效快,效果显著,持效期长,优于新一佳+捕虱螟.其中以每hm2新一佳600ml+锐劲特225ml、锐劲特450ml+敌敌畏2250ml是防治稻田灰飞虱的最佳配方,在二代灰飞虱低龄若虫高峰期用药一次,对灰飞虱的防效可达95%以上,持效期可维持20d左右,达到了速效性与持效性相结合的目的,值得在水稻生产上灰飞虱防治中推广应用. 相似文献
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太和县大豆病虫害大面积发生,是大豆种植效益和种植面积“双减”的主要原因,严重影响农民种植大豆的积极性。本文结合夏大豆生产实际,总结了播种期、苗期和分枝期、开花结荚期、鼓粒期以及成熟期大豆主要病虫害防治对象,提出了防治措施,以期为大豆病虫害防治提供参考。 相似文献
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该文针对中国大豆产业的现状,结合大豆本身营养功能,提出开发新型大豆复合型饮料,振兴中国大豆产业.同时综述了新型大豆复合型饮料研究现状. 相似文献
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转基因大豆及其深加工产品的PCR检测 总被引:2,自引:0,他引:2
以PCR技术为基础,建立了从大豆及其深加工产品中检测转基因成分的方法。大豆及其深加工产品采用改良的CTAB法进行DNA提取纯化,大豆色拉油DNA则用试剂盒方法进行了提取纯化。对提取的DNA用PCR方法对大豆特异性内源基因lectin进行扩增,设计CaMV35启动子和NOS终止子特异性引物对其是否含有转基因成份进行初步的定性PCR筛选,并用抗除草剂基因CP4EPSPS对阳性结果进行确证。实验结果表明,改良的CTAB法对大豆深加工产品的DNA有很好的提取效果,而试剂盒方法对色拉油的DNA有良好的提取效果;PCR检测转基因的方法快速高效,检测结果与标准相符。 相似文献
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HU Yu-qi SHENG Ze-wen LIU Jin-yue LIU Qi QIANG Shen SONG Xiao-ling LIU Biao 《农业科学学报》2022,21(1):36-48
The introduction of genetically modified (GM) soybean into farming systems raises great concern that transgenes from GM soybean may flow to endemic wild soybean via pollen. This may increase the weediness of transgenic soybean by increasing the fitness of hybrids under certain conditions and threaten the genetic diversity of wild soybean populations. Although pollen-mediated gene flow between GM crops and wild relatives is dependent on many factors, the sexual compatibility (SC) determined by their genetic backgrounds is the conclusive factor. The considerable genetic variation among wild soybean populations may cause compatibility differences between different wild and cultivated soybeans. Thus, an evaluation of the SC between transgenic soybean and different wild soybeans is essential for assessing the environmental consequences of cultivated soybean–wild soybean transgene flow. The podding and seed sets were assessed after artificial hybridization using transgenic glyphosate-resistant soybean as the paternal parent and 18 wild soybean populations as the maternal parents. Then, the average number of filled seeds produced in 200 flowers (AFS) was calculated for each wild soybean under natural self-pollination as well as under artificial crossing with transgenic soybean. Finally, the index of cross-SC was calculated (ICSC) as the ratio of the AFS of wild soybean artificially crossed with transgenic soybean and the AFS of naturally self-pollinated wild soybean. The results demonstrated that after self-pollination and crossing with transgenic soybean, the average podding rates of 18 wild soybean populations ranged within 96.50–99.50% and 4.92–18.03%, and the average filled seed numbers per pod varied from 1.70 to 2.69 and 0.20 to 0.48, respectively. The results showed that approximately 89% of wild soybeans displayed either medium or higher than medium SC with transgenic soybean (ICSC>1.0%). This implied the high possibility of gene flow via pollen from transgenic soybean to wild soybean. 相似文献
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浙鲜豆3号是浙江省农业科学院作物与核技术利用研究所育成的菜用大豆新品种,2004年引入慈溪市,经多年试种,表现产量高、品质佳、商品性好、抗逆性强.种植时栽培密度16.5万株·hm-2,用商品有机肥1500kg·hm-2、三元复合肥300kg·hm-2、钙镁磷肥450kg·hm-2作基肥,营养生长期施三元复合肥150kg·hm-2,及时防治病虫害,适时采收. 相似文献