5%阿维菌素·高效氯氟氰菊酯水乳剂防治棉田4代棉铃虫效果

为有效防治棉花4代棉铃虫,采用5%阿维菌素·高效氯氟氰菊酯水乳剂、1%阿维菌素乳油、2.5%高效氯氟氰菊酯乳油3种药剂进行田间试验。结果表明,5%阿维菌素·高效氯氟氰菊酯水乳剂15、30g·hm-2用药1次7d后防效达77.23%、80.35%,显著优于其他药剂处理。建议生产上使用5%阿维菌素·高效氯氟氰菊酯水乳剂防治4代棉铃虫,中等偏重发生年份,应掌握在棉花棉铃虫卵孵高峰期用药,其推荐使用剂量为15~30g·hm-2。     

8种杀虫剂防治棉花棉铃虫田间药效

近年来,江苏省丰县棉花棉铃虫发生有逐年加重趋势。为更好地指导棉农科学防治棉铃虫,保障本县棉花高产优质生产,笔者实施了30％茚虫威WG等8种药剂防治棉铃虫田间药效试验,筛选出一批新型高效低毒低残留农药。结果表明：30％茚虫威WG、150g·L^-1茚虫威SC、375g·L^-1硫双威SC、55％毒·氯EC、125g·L^-1高效氟氯氰菊酯SC用于防治棉花棉铃虫均有较好的速效性和持效性,均优于对照药剂480g·L^-1毒死蜱EC,且对棉花安全,适宜大面积推广应用。     

2．5％高效氯氟氰菊酯EC防治小麦蚜虫田间药效试验

2·5%高效氯氟氰菊酯EC防治小麦蚜虫的使用剂量以300 m l/hm2(ai·7·5 g/hm2)为宜。掌握在小麦灌浆初期,蚜虫发生始盛期用药防治。采用常规喷雾,每公顷用药量对水600 kg,做到喷雾均匀周到,确保防治效果。1试验目的为验证2·5%高效氯氟氰菊酯EC对小麦蚜虫的防治效果,确定最佳使     

28%辛·灭EC对棉铃虫防治效果初报

近年来,由于耕作制度的改变,棉铃虫在各棉区的为害日趋加重。因此,筛选有效的防治药剂,是防治棉铃虫为害的主要措施之一。为验证28%辛·灭EC对棉铃虫的防治效果,2004年进行了田间药效对比试验。1材料和方法供试药剂:28%辛·灭EC和20%灭多威EC(对照)均由山东华阳农药化工集团有限公司生产,50%辛硫磷EC为江苏省南通染化厂生产。试验设28%辛·灭EC每公顷:(1)168 g、(2)210 g、(3)252 g三种剂量处理;另设:(4)20%灭多威EC 150g·hm-2、(5)50%辛硫磷EC 375 g·hm-2作药剂对照,并设喷施等量清水为空白对照。各处理重复3次,随机区组排列,面积…     

20%高效顺反氯马EC防治棉铃虫试验研究

为了明确20%高效顺反氯马EC对棉铃虫的防治效果与适用剂量,2009年进行了田间药效试验。结果表明:20%高效顺反氯马EC 1000倍液、1500倍液和2000倍液对棉铃虫的防效均极显著优于10%氯氰菊酯EC 2000倍液和40%马拉硫磷EC 1000倍液,具有良好的防治效果。建议田间用量为1000～2000倍液,用药液量为600 kg·hm-2。     

低毒高效新农药防治棉铃虫比较试验

试验征集筛选了市场上9种常用或新推出防效较好的药剂,通过对棉铃虫田间分区试验,明确其在棉铃虫应用上的实际防效及用药成本,得出高渗甲维盐堆乳剂、高效氯氟氰菊酯乳油、阿维菌素·三唑磷乳油、阿维菌素·辛硫磷乳油、硫丹乳油的防效较好.以供广大棉农正确选择使用.     

7种杀虫剂对菜青虫的防效试验报告

应用7种药剂对菜青虫进行防治试验。结果表明：0.5% 阿维菌素乳油、2.5% 高效氯氟氰菊酯水乳剂、4.5% 氯氰菊酯乳油、40% 毒死蜱乳油、40% 辛硫磷乳油对菜青虫有良好的防治效果。施药后3 d防效可达81.68%以上;药后7 d的防效在84.38% 以上,持效期7～10 d,生产上防治时可轮换或混合使用。     

单季晚稻防治稻飞虱药剂筛选试验

6种药剂防治稻飞虱试验结果表明,呋虫胺20%可湿性粉剂30 g/667 m2、烯啶·吡蚜酮60%水分散粒剂12 g/667 m2、烯啶·吡蚜酮80%水分散粒剂10 g/667 m2对单季晚稻稻飞虱均有不错的防治效果,尤其是对低龄若虫。烯啶·吡蚜酮60%水分散粒剂12 g/667 m2、烯啶·吡蚜酮80%水分散粒剂10 g/667 m2对高龄若虫表现最为突出,速效性好,同时对天敌几乎无影响。吡蚜酮50%可湿性粉剂30 g/667 m2速效性较一般,但持效性较好。吡虫啉10%可湿性粉剂50 g/667 m2的防效较差,对高龄若虫几乎不起作用。毒死蜱40%水乳剂100 mL/667 m2加氟啶虫胺腈22%悬浮剂14 mL/667 m2速效性一般,持效性较差,却对天敌影响较大。以六（4）代褐飞虱为主的稻田为例,需掌握低龄若虫或卵孵高峰期,科学选用吡蚜酮50%可湿性粉剂、呋虫胺20%可湿性粉剂、烯啶·吡蚜酮60%水分散粒剂、烯啶·吡蚜酮80%水分散粒剂进行轮换防治。     

新型杀虫剂对棉铃虫及天敌影响的研究

研究了 8种杀虫剂对棉铃虫的田间药效及对棉田主要天敌的影响。结果表明 :1 .8%阿维菌素EC、5 %氟铃脲 EC和 5 .7%氟氯氰菊酯 EC对棉铃虫的综合防效较好 ,优于常用的有机磷和拟除虫菊酯类杀虫剂。同时阿维菌素和氟铃脲对天敌较安全 ,是综合防治棉铃虫的理想药剂 ,适宜于棉田推广应用     

5%氟铃毙EC防治棉铃虫效果评价

为明确 5 %氟铃毙 EC防治棉铃虫的田间效果及其应用技术 ,于 2 0 0 2年 7月进行了田间小区试验 ,取得了较好的效果。1试验基本情况试验在聊城市东昌府区张炉集镇棉田进行 ,试验地水肥条件良好 ,土质沙壤 ,棉花品种常规棉 ,4月 2 6日直播 ,密度每公顷 4.5万株。本次试验由于天气原因 ,实施时已进入当地二代棉铃虫盛期末 ,卵量偏少 ,多为 1～ 3龄幼虫 ,试验期间以多云间阴天气为主 ,气温 2 6～ 2 8℃。无有效降雨。供试药剂 :5 %氟铃毙 EC(浙江温州市鹿城植保化学厂产 ) ,4.5 %高效氯氰菊酯 EC(广东化州市农药厂产 ) ,5 %氟铃脲 EC(山东德…     

豫北优质大豆产业发展策略

针对豫北地区的大豆生产现状，从气候、土壤、品种、生态因素及市场需求等方面提出了优质大豆的发展策略与途径。     

Comparisons of methods of scheduling irrigations of potatoes

Irrigation of Netted Gem potatoes was scheduled during three growing seasons by three methods: (a) when plants displayed first visual symptoms of moisture stress, (b) when indicated by a soil moisture budget involving estimated evapotranspiration, and (c) on the basis of tensiometer readings of soil moisture suction. When the tensiometer method of scheduling was used, the mean yields of tubers were 55.0 and 25.8 cwt/acre (6160 and 2890 kg/ha) higher than those obtained with the other two scheduling methods. Methods did not affect the specific gravity of potatoes. Method (a) scheduled irrigations least frequently. Scheduling by the budget method was not always adequate because it was based on the assumption that the crop extracted water from a constant 4 ft (1.2 m) profile from planting to full vegetative growth. In one year the budget method scheduled the first irrigation earlier than necessary and delayed the second irrigation during a critical period of crop growth. From full vegetative cover to harvest the irrigation schedules were alike for both the budget and tensiometer methods.     

湖南沅陵4种绿茶品质成分分析

以长沙县高桥相同嫩度茶鲜叶原料采用卷曲形毛尖茶加工工艺制绿茶为对照,分别对沅陵县齐眉翠峰、凤娇碣滩茶、干发茶和军大坪茶4种绿茶的主要生化成分与感官品质进行初步分析。结果表明,沅陵4种绿茶的茶多酚总量28.76%~30.34%,游离氨基酸总量2.35%~3.22%,咖啡碱含量3.00%~3.63%,水浸出物含量37.26%~40.07%,可溶性糖总量5.46%~5.65%,可溶性蛋白含量1.50%~1.74%,类黄酮化合物总量1.16%~1.79%,叶绿素总量1.36%~2.01%,儿茶素总量13.53%~16.20%。与对照相比,4种绿茶的茶多酚、可溶性糖和儿茶素总量均高于对照,除齐眉翠峰外其余3种茶样水浸出物和叶绿素总量均高于对照,除干发茶外其余3种茶样类黄酮化合物总量均高于对照。     

吉林省平安农业科学院大豆所大豆研究工作报告

1　吉林省平安农业科学院大豆研究工作简介吉林省平安农业科学院大豆研究所 ,设在吉林省长春市西安大路种子大厦内。现有科技人员 6人 ,其中研究员 2人 ,农艺师 2人 ,技术员 2人 ,定向培养研究生 2人。大豆研究所的主要任务是选育稳产、高产、优质及抗病虫大豆新品种 ;同时密切     

Analysis of nutritional components of eight famine foods of the Republic of Niger

In the western Sahel, indigenous plants become important staples when cereal harvests are inadequate to support populations inhabiting that region of Africa. The purpose of this study was to assess the nutrient content of several of these edible wild plants. The leaves of the following seven plant foods were analyzed: Ziziphus mauritiana, Cerathotheca sesamoides, Moringa oleifera, Leptadenia hastata, Hibiscus sabdarifa, Amaranthus viridi, and Adansonia digitata. The fatty acid, vitamin E, carotenoid, selected mineral and amino acid contents of these plant foods were determined. These same analyses were performed on the fruit of the Adansonia digitata. In quantitative and qualitative terms, Amaranthus viridis was found to be an excellent source of protein. Its amino acid composition compared favorably to that of a World Health Organization (WHO) protein standard. It also contained considerable amounts of the two fatty acids that are essential in humans (linoleic and -linolenic) and a number of minerals including iron, magnesium, calcium and zinc. The leaves of Hibiscus sabdarifa contained an appreciable quantity of protein the composition of which was comparable to the WHO standard. The mineral content of the leaves of this plant was also exceptionally high; noteworthy was its high zinc content. H. sabdarifa also contained significant quantities of the two essential fatty acids. Ziziphus mauritiana was an excellent source of the essential fatty acid linoleic acid and several of the metals including iron, calcium, magnesium and zinc. Its content of other essential nutrients, however, was rather low. In general, Adansonia digitata leaves were nutritionally superior to the fruit of the tree; however, the fruit did contain useful quantities of potassium, phosphorus, zinc and -linolenic acid. The Leptadenia hastata leaves were an especially good source of lutein and -carotene. These data should be useful to the people who inhabit the western Sahel in helping them devise healthy diets during times when cereal staples are in short supply.     

防治水稻潜叶蝇的药剂筛选

通过对防治水稻潜叶蝇不同药剂、不同用量的田间对比试验,结果表明,32 g/kg的35%丁硫克百威拌种预防潜叶蝇效果最好,药效可达55 d以上,适宜在生产上推广应用。     

狗牙根诱变后代抗寒性评价

通过电解质外渗法和匍匐茎恢复试验对‘阳江’狗牙根及其12个通过形态鉴定选出的坪用价值高且花序密度低的诱变后代进行抗寒性鉴定。电解质外渗法结果表明:诱变后代间的抗寒性具有较大差异,其叶片半致死温度(LT₅₀)的变异范围为-7.6～-0.2℃(最低值与最大值相差7.4℃);参试材料抗寒性由强到弱依次为M18>M4>M26>M28> M22>阳江>M29>M31>M10>M37>M16>M1>M25,其中,有5个诱变后代抗寒性优于亲本,分别是M18、M4、M26、M28、M22。匍匐茎恢复实验结果表明:诱变后代M1、M22、M26、M31、M25在0℃和-5℃低温胁迫后的恢复生长率都高于亲本,恢复能力均优于亲本;M10、M37、M28在-5℃低温胁迫下,恢复生长能力低于亲本,抗寒性相对较弱,M16和M4在0℃和-5℃低温胁迫下,恢复生长率都低于亲本,抗寒性明显弱于亲本。综合2种方法鉴定结果显示:诱变后代M1、M25的恢复能力较强;M4、M28的叶片抗寒性较好,青绿期较长;M22、M18、M26的叶片抗寒性和匍匐茎恢复能力均较强;M29,M31的叶片抗寒性和匍匐茎恢复能力与亲本相似;M10、M16、M37的叶片抗寒性和匍匐茎恢复能力均较弱,整体抗寒性较弱。     

12份白花泡桐材料亲缘关系的ISSR分析

以‘福桐’、‘绿桐’2个无性系与10个不同种源的白花泡桐个体为研究对象，采用ISSR分子标记对12份白花泡桐材料的亲缘关系进行研究，并利用DPSv3.01进行聚类分析。结果表明：10条引物共扩增出66条条带，其中有37条多态带，多态性比例为56.1%。根据ISSR聚类分析结果，在遗传距离为0.35时，12份白花泡桐材料可分为5类，第1类为‘福桐’无性系与河南、河北种源个体；第2类为‘绿桐’无性系与湖南、湖北、江苏种源个体；第3类为浙江、广东种源个体；第4类为江西、福建种源个体；第5类为广西种源个体。此结果     

龙眼种质资源果实经济性状的稳定性评价

为了探讨龙眼(Dimocarpus longan Lour.)种质果实性状的稳定性,连续3a对40份不同基因型龙眼种质果实数量性状的年际间表现进行测定比较。结果表明,在气候条件差异较大的不同年份,单果重、果皮重、果肉重、种子重、果皮厚、可食率、可溶性固形含量等果实性状均表现丰富的多样性,并存在年际间的显著或极显著水平差异,气候条件对果实数量性状有显著影响;不同性状的稳定性有差异,其中可食率的稳定性最高,其次是可溶性固形物含量。通过聚类分析,可将40份龙眼种质按果实性状稳定性分成7类。