共查询到19条相似文献，搜索用时 250 毫秒
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为了解不同杀虫剂对井上蛀果斑螟卵的触杀作用,采用浸渍法测定了辛硫磷、丙溴磷、乙酰甲胺磷、高效氯氟氢菊酯、杀虫双、除虫脲、噻嗪酮、阿维.哒螨灵、吡虫.三唑磷等9种药剂对井上蛀果斑螟卵的触杀效果。结果表明：2.5%高效氯氟氢菊酯EC 600倍液,对井上蛀果斑螟卵的触杀效果最高,校正死亡率达98.67％;40%辛硫磷EC 250和500倍液、30％乙酰甲胺磷EC 300倍液、37%噻嗪酮SC 250倍液、20％吡虫.三唑磷EC 150倍液处理,校正死亡率均在90%以上。此外,40%辛硫磷EC 1 000和1 500倍液、40%丙溴磷EC 2 000和2 500倍液、30％乙酰甲胺磷EC 600倍液、2.5%高效氯氟氰菊酯EC 800倍液、25%杀虫双AS 100和150倍液、25%除虫脲2 500倍液、8％阿维.哒螨灵EC 1 500倍液和20％吡虫.三唑磷EC 150倍液的触杀效果均高于80％。综合试验结果考虑,防治井上蛀果斑螟,可使用40％辛硫磷EC 500~1000倍液、30％乙酰甲胺磷EC 300~600倍液、2.5%高效氯氟氰菊酯EC 600~800倍液、37% 噻嗪酮SC 250倍液和20％吡虫.三唑磷EC 100~150倍液对该虫的卵期进行防治。 相似文献
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以香蕉假茎象甲为研究对象,采用浸香蕉假茎接虫法和点滴法研究6种药剂对香蕉假茎象甲成虫的毒力和室内药效,为生产上选药提供参考依据。毒力测定结果表明,6种药剂对香蕉假茎象甲成虫的毒力依次为高效氯氟氰菊酯>异丙威>敌百虫>吡虫啉>啶虫脒>阿维菌素,24 h的LC50值分别为24.6249、42.6853、100.1624、162.3865、185.6267和228.8425 mg/L;室内药效结果表明,药后14 d,除敌百虫外,高效氯氟氰菊酯、异丙威、吡虫啉、啶虫脒和阿维菌素对香蕉假茎象甲成虫的校正死亡率均达到100%,且高效氯氟氰菊酯和异丙威对香蕉假茎象甲成虫表现出较好的速效性,而吡虫啉、啶虫脒和阿维菌素对香蕉假茎象甲成虫表现出较长的药效持续期。高效氯氟氰菊酯、异丙威、吡虫啉、啶虫脒和阿维菌素均可作为防治香蕉假茎象甲的潜力药剂,供田间选择试用。 相似文献
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《科技视界》2013,(14)
用清水作对照,采用1.8%阿维菌素乳油450g/hm2、40%毒死蜱乳油1800g/hm2、20%三唑磷乳油1800g/hm2和40%辛硫磷乳油1500g/hm2进行防治水稻稻纵卷叶螟的对比试验。施药15天后,1.8%阿维菌素乳450g/hm2和40%毒死蜱乳油1800g/hm2的防治效果分别为85.58%和86.80%,卷叶内有虫率均为0;40%辛硫磷乳油1500g/hm2的防治效果为79.60%,卷叶内有虫率为4.35%;20%三唑磷乳油1800g/hm2的防治效果最低,为72.45%。这4种药剂均对稻纵卷叶螟有一定防治效果,且以1.8%阿维菌素乳油450g/hm2和40%毒死蜱乳油1800g/hm2的防治效果最为明显。 相似文献
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试验用24%帕力特(虫螨晴)悬浮剂等农药,对越冬代桑尺蠖的防治效果进行了对比试验,结果表明:喷药后7d的防治效果依次为:24%帕力特悬浮剂1667倍液防效为98.69%,40%毒死蜱乳油1000倍液防效为92.12%,40%丙溴.辛硫磷乳油1500倍液防效为91.69%,90%桑宝灭多威可湿性粉剂4000倍液防效为87.45%,8%残杀威可湿性粉剂1000倍液防效为83.15%,33%乙酰甲胺磷乳油1000倍液防效为61.10%。春季防治越冬代桑尺蠖,宜用40%毒死蜱乳油、40%丙溴.辛硫磷乳油或24%帕力特悬浮剂,不宜使用30%乙酰甲胺磷乳油。 相似文献
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目前,荔枝蒂蛀虫的防治主要以化学防治为主,但由于药剂的不规范使用,导致施药次数增加,防治难度加大。为筛选对荔枝蒂蛀虫有高效防控作用的药剂,本研究采用药膜法测定了4种药剂对荔枝蒂蛀虫的室内毒力,并进行了田间效果评价。研究结果表明：4种药剂中1.5%甲氨基阿维菌素苯甲酸盐乳油对荔枝蒂蛀虫成虫的LC50为7.34 mg/kg,具有较高的毒力,5%氯虫苯甲酰胺悬浮剂、13%高效氯氰菊酯?三唑磷乳油和15%高效氯氰菊酯?毒死蜱乳油的毒力则相对较差。田间药效试验中,以上4种药剂对荔枝蒂蛀虫的田间防效均在90%以上。本研究表明,1.5%甲氨基阿维菌素苯甲酸盐乳油、5%氯虫苯甲酰胺悬浮剂、13%高效氯氰菊酯?三唑磷乳油和15%高效氯氰菊酯?毒死蜱乳油对荔枝蒂蛀虫具有较好的防治效果,可在荔枝产区继续推广使用。 相似文献
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野外调查结果表明,柑桔大实蝇在贵州地区一年发生一代,以蛹在土中越冬,越冬死亡率约40%结合蛋白诱剂诱捕器监测进一步发现,柑桔大实蝇初次发生时间为4月,高峰期为7-8,尾期为9月。化学药剂防治试验表明：7种化学药剂防效为67.59～94.20%。防治效果由高到低依次为2.5%高效氯氟氰菊酯乳油＞氰戊菊酯20%乳油＞0.1%阿维菌素乳油饵剂＞48%毒死蜱乳油＞40%辛硫磷乳油＞2.5%乙基多杀菌素悬浮剂＞敌百虫90%原药。实际生产中,推荐使用2.5%高效氯氟氰菊酯乳油或氰戊菊酯20%乳油,若进一步节省成本可使用0.1%阿维菌素乳油饵剂。 相似文献
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【目的】研究掌握木毒蛾在广西荔枝上的发生危害规律,筛选出高效的防治药剂,为木毒蛾的田间防治提供科学依据。【方法】1)通过室内继代饲养观察及田间调查相结合,掌握木毒蛾的生育历期;2)采用喷雾法对木毒蛾进行室内毒力测定及田间防治试验【结果】1)木毒蛾在广西的发生代数为一年一代,幼虫期7龄,幼虫期50-60天,以幼虫在卵壳内越冬。2)试验结果表明,施药24h后, 20%甲氰菊酯EC、2.5%敌杀死EC、４.5%高效氯氟氰菊酯EC对木毒蛾的防效＞90%,100克/升联苯菊酯EC、10%除尽SC的防效＞80%,40%辛硫磷EC、480克/升毒死蜱EC60克/升乙基多杀霉素SC＜80%。【结论】20%甲氰菊酯EC、2.5%敌杀死EC、4.5%高效氯氟氰菊酯EC可做为荔枝木毒蛾暴发时防治的首选药剂, 相似文献
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大田常用农药对家蚕的熏蒸毒性测试 总被引：11，自引：4，他引：7
为减少粮桑混栽地区大田使用农药不当对蚕桑生产造成的损失,采用密闭熏蒸法测定了7种大田常用农药对家蚕的熏蒸毒性。在30℃环境中经过24 h,对2龄起蚕的LC50:敌敌畏0.1860 mg/m3,敌畏.毒1.3241 mg/m3,毒死蜱48.4111 mg/m3,氟腈.唑磷139.8818 mg/m3,三唑磷161.1514 mg/m3,氟虫腈208.330 mg/m3,吡虫啉333.330mg/m3时2龄起蚕仍无中毒症状。在25℃下经过24 h,对2龄起蚕的LC50:敌敌畏0.2020 mg/m3,敌畏.毒3.7282mg/m3,毒死蜱91.3669 mg/m3。结果表明:农药对家蚕的熏蒸毒性随着温度的升高而增强;敌敌畏、敌畏.毒对家蚕的熏蒸毒性最强,毒死蜱有一定的熏蒸毒性,三唑磷、氟腈.唑磷、氟虫腈、吡虫啉对家蚕的熏蒸毒性较小。 相似文献
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以“贵长”猕猴桃为试材,在2015-2017年调查修文地区蝙蝠蛾、透翅蛾的生活史和危害特点,同时记录其在猕猴桃不同树龄上的危害情况,并研究了5种药剂对透翅蛾、蝙蝠蛾的防治效果。结果表明：蝙蝠蛾、透翅蛾在修文地区猕猴桃上1年发生1代,5月至8月为蝙蝠蛾幼虫危害盛期;4月至6月是透翅蛾幼虫危害盛期。蝙蝠蛾幼虫在3~6龄猕猴桃上危害较轻,透翅蛾对大于6龄猕猴桃危害较重。幼虫期采用喷雾法施用77.5%敌敌畏EC 对蝙蝠蛾防治效果较好,药后5 d校正防效达92.36%。480g?L-1毒死蜱EC在5 d对透翅蛾的校正防效为93.30%。选择合适药剂可以有效防控蝙蝠蛾与透翅蛾虫害的发生。 相似文献
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通过调查海南省澄迈县主要蕉园土壤养分状况,评估其土壤肥力状况,为澄迈县植蕉区土壤养分管理提供科学依据。结果显示,76.19%的土壤pH大于5.5,适合香蕉生长; 90.48%的蕉园土壤有机质含量在20.0～30.0g/Kg,66.67%的蕉园土壤全氮含量中等,比较适合香蕉生长,仅有9.52%的蕉园土壤全氮含量偏低,76.19%土壤有效磷在10～40 mg/K,54.76%的土壤速效钾含量高于250.0 mg/Kg,仅有11.9%土壤速效钾含量低于100.0 mg/Kg,有效铜含量均高于0.2 mg/Kg,61.9%％蕉园土壤有效铜含量处于丰富或极丰富水平,59.52%％蕉园土壤有效锌含量处于丰富或极丰富水平。目前澄迈县蕉园养分含量适中,适合香蕉生长,因为还有小部分蕉园土壤养分含量偏低,为了实现蕉园合理施肥和可持续发展,建议用有机肥培肥地力,在施肥用机肥建议使用含铜、锌含量低的有机肥,在施用化肥时,适当减少钾肥用量。 相似文献
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为了筛选有效的枸橘潜叶甲防治药剂,本文选用20%丁硫克百威乳油等20种常用化学药剂,在桂林地区的红江橙和柚树上进行了柑枸橘潜叶甲防治效果试验。结果表明,20%丁硫克百威乳油、2.5%溴氰菊酯乳油、10%高效氯氰菊酯乳油、40%丙溴磷乳油等14种药剂,防治越冬代出蛰的成虫或新一代成虫效果较好,每年施药1次即可达到防治目标;50%灭蝇胺可湿性粉剂、1.14%甲维盐乳油、1.8%阿维菌素乳油和20%烯腚虫胺水分散粒剂的速效性较好,但持效性较差;15%哒螨灵乳油和20%氯虫苯甲酰胺悬浮剂则不宜作为枸橘潜叶甲的防治药剂。 相似文献
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本研究通过减施化肥和配施氨基酸有机肥提高香蕉生长、产量、品质及改善土壤质量,为海南省香蕉产业减肥增效、改善土壤环境提供思路。以“南天黄”香蕉为试材,以农户施肥为对照(CK),设置2个处理：配方肥(减施化肥29%)和氨基酸配方肥(减施化肥36%)。分析各处理对香蕉生长、产量、品质及土壤养分的影响。结果表明：与农户施肥相比,配方肥处理的香蕉产量增加13%,果实维生素C提升25%,土壤碱解氮减少13%;氨基酸配方肥处理的香蕉产量增加30%,孕蕾期株高和假茎围均增加20%,果实维生素C提升32%,土壤pH增加0.6,碱解氮减少36%,速效磷增加50%。因此,减施化肥36%+氨基酸有机肥是适合海南省香蕉产业的减肥增效新模式。 相似文献
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B. G. Nath P. K. Pathak S. V. Ngachan A. K. Tripathi A. K. Mohanty 《Tropical animal health and production》2013,45(7):1513-1518
The present study was conducted to know the smallholder pig production system in tribal areas of Sikkim State, India. Two hundred tribal farmers were selected randomly from the North and East District of the state. Information on socio-economic characteristics of farmers (gender, occupation, educational status, and farming experience), management practices, disease prevalence, and economics in pig production was collected. The study recorded the mean land holding as 1.2?±?0.8 ha, and the number of pigs per farm was 5.0?±?0.28. Pigs were mainly kept as a source of income, and 70 % of farmers reared crossbreed pigs. Ninety percent (90 %) of respondents practiced the intensive system of management whereby kitchen wastes along with cooked mixture comprising maize bhusa, mustard oil cake, pseudostem of banana, tuber, stem, and plant leaves were used to feed their animals. About 40.5 % of farmers procured their breeding stock from government farms that had good records and utilized veterinary services like timely vaccination and deworming. The diseases prevalent in the study area were swine fever, diarrhea, helminthoses, sarcoptic mange, pneumonia, etc. The litter sizes at birth (local, 4.3?±?0.45; crossbreed, 7.2?±?0.33), at weaning (local, 2.79?±?0.24; crossbreed, 6.1?±?0.21), and age at first farrowing (local, 365.39?±?7.96 days; crossbreed, 337.24?±?8.79 days) were recorded. Production costs of meat extracted from local and crossbred pigs were 1.08 $/kg and 0.86 $/kg, respectively. 相似文献
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The objective of this study was to determine the genetic diversity and evolution of Danzhou chicken.The complete mitochondrial DNA (mtDNA) D-loop regions of 36 Danzhou chickens were amplified,sequenced and analyzed.The sequencing reads were compared with the complete mtDNA D-loop sequence of several relative strains of chicken annotated in GenBank,and analyzed by bioinformatics methods.The genetic diversity and its evolutionary relationship in Danzhou chicken were analyzed.The results showed that the lengths of PCR products at the D-loop region were 1 210 bp,with 59.9% being A+T and 40.1% as C+G.The variable regions were 167-1 215 bp,and the high variable regions were mainly 167-367 bp.A total of 20 variable sites that defined 6 haplotypes were identified.The average haplotype diversity (Hd) and average number of nucleotide difference (k) were 0.571 and 6.449,respectively,the nucleotide diversity (Pi) was 0.00537,and the Tajima's D value of neutrality test was 1.61643.6 haplotypes could be grouped to 3 haplogroups (A,B and C) as determined by phylogenic analysis,with B clade,as the most abundant population.It concluded that the genetic diversity and haplotype diversity of Danzhou chicken were relatively low.Phylogenetic tree showed that the genetic composition of Danzhou chicken came from 3 maternal ancestors,Gallus gallus spadiceus,Gallus gallus bankiva and Gallus gallus jabouillei were potential ancestors.There was few influence of exotic lineage detected,which indicated that Danzhou chicken was a relatively conserved breed. 相似文献
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A. Nurfeta A. Tolera L. O. Eik F. Sundstøl 《Journal of animal physiology and animal nutrition》2009,93(1):94-104
Feed intake, in vivo nutrient digestibility and nitrogen utilization were evaluated in male sheep fed different fractions (leaf, pseudostem, corm, whole plant) of enset, untreated or 2% urea‐ and 3% calcium oxide‐ (CaO or lime) treated wheat straw and Desmodium intortum hay as sole diets. All feeds, except D. intortum hay and enset leaf had low crude protein (CP) content. Non‐fiber carbohydrate contents were higher in enset fractions, especially in pseudostem and corm relative to other feeds. Enset leaf and pseudostem had high calcium, phosphorus and manganese contents. Corm, whole enset and D. intortum hay were rich sources of zinc. Daily dry matter and CP intakes were higher (p < 0.05) in sheep fed D. intortum hay (830 and 133 g, respectively) than those fed pseudostem (92 and 7.8 g, respectively). Organic matter digestibilities were highest for corm (0.780) and whole enset (0.776) and lowest for D. intortum hay (0.534) and untreated wheat straw (0.522). The CP digestibility ranged from 0.636 in D. intortum hay to 0.408 in corm. Nitrogen (N) balance was highest (p < 0.05) in D. intortum hay (10.4 g/day) and lowest in corm (?1.3 g/day). Enset leaf could be a useful protein supplement whereas the pseudostem and corm could be good sources of energy. 相似文献
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在江苏省丰县首次发现桑飞象为害桑树,并酿成严重灾害.此虫一年一代,以幼虫在土中越冬;翌年3月下旬至4月上旬在3—10厘米土层内化蛹,蛹期12—17天;4月中、下旬成虫出土上树取食桑芽和叶片,交尾后2—7天产卵在枝顶及春季剪梢口下段等处,每头雌成虫产卵44—205粒,卵期15—19天;初孵幼虫入土取食植物.用50%辛硫磷1000倍液每亩喷雾150—200斤防治效果良好. 相似文献