19种杀虫剂对桃小食心虫卵的毒力测定

为明确19种杀虫剂对桃小食心虫的防治效果,为卵期喷药防治该虫提供依据,用浸渍法进行了室内毒力测定。结果表明,19种供试药剂的毒力差异较大,拟除虫菊酯类杀虫剂溴氰菊酯、高效氯氟氰菊酯、甲氰菊酯、高效氯氰菊酯、氰戊菊酯及混剂甲维氯氰对桃小卵活性较高,其LC50均小于0.3 mg/L;其次为室内甲维盐、氟虫腈、灭幼脲、丁烯氟虫腈、毒死蜱、噻虫嗪、虫螨腈;阿维菌素、噻嗪酮、茚虫威较低;氯虫苯甲酰胺毒力最低。在桃小卵期树上施药,可优先选用杀卵活性较高的拟除虫菊酯类药剂,与具有杀幼虫活性、持效期长的灭幼脲和氯虫苯甲酰胺混用,可有效防治桃小食心虫。     

Insecticide resistance monitoring for the invasive populations of fall armyworm,Spodoptera frugiperda in China

Fall armyworm has invaded China and colonized its populations in tropical and sub-tropical regions of South China since December 2018. Chemical spray has been widely used to control the pest, which shall lead to resistance evolution. In this research, we collected five populations of the pest from Yunnan, Hainan, Tibet, and Fujian of China, and tested their susceptibilities to pyrethroid, organophosphorus, oxadiazine, diamide, antibiotics and other types of insecticides(14 insecticides totally) in the laboratory. Based on the susceptible baseline published from the previous studies, the resistance ratio was 615–1 068-fold to chlorpyrifos, 60–388-fold to spinosad, 26–317-fold to lambda-cyhalothrin, 13–29-fold to malathion, 9–33-fold to fenvalerate, 8–20-fold to deltamethrin, 3–8-fold to emamectin benzoate and 1–2-fold to chlorantraniliprole, respectively. The median lethal concentration(LC_(50)) of other six insecticides without the susceptible baselines was 148.27–220.96 μg mL~(–1) for beta-cypermethrin, 87.03–128.43 μg mL~(–1) for chlorfenapyr, 16.35–99.67 μg mL~(–1) for indoxacarb, 10.55–51.01 μg mL~(–1) for phoxim, 7.08–8.78 μg mL~(–1) for M-EBI(the mixed insecticide of emamectin benzoate and indoxcarb) and 1.49–4.64 μg mL~(–1) for cyantraniliprole. This study can be helpful for chemical control as well as for resistance monitoring and management of the pest in China.     

2007年江浙地区二化螟抗药性检测

 【目的】2007年测定江苏、浙江地区二化螟对杀虫单、三唑磷、氟虫腈、阿维菌素及拟除虫菊酯类等9种杀虫剂的抗性,以及6类20种杀虫剂对东海二化螟的毒力,为指导用药提供科学依据。【方法】采用4龄幼虫点滴法测定。【结果】（1）瑞安、苍南、高淳种群对杀虫单具有极高水平抗性（164.8～248.1倍）,连云港和东海种群具有中等水平抗性（18.1和25.1倍）。（2）5个种群对三唑磷的敏感性变化很大,其中瑞安、苍南、高淳种群为极高水平抗性（204.8～1395.2倍）,连云港和东海种群未检测到明显的抗性（1.8和3.1倍）。（3）瑞安、苍南种群对氟虫腈为中等水平抗性（12.3和26.8倍）,其它3个种群为敏感水平（1.3～2.9倍）。（4）苍南种群对阿维菌素产生低水平的抗性（7.6倍）,其它种群尚处于敏感水平（0.9～2.0倍）。（5）瑞安、苍南种群对氯氟氰菊酯、氰戊菊酯、高效氯氰菊酯、高效氟氯氰菊酯及溴氰菊酯为中～高水平的抗性,其它3个种群对除氰戊菊酯以外的4种拟除虫菊酯为低～中水平的抗性（5.3～31.2倍）。（6）测试的20种药剂对东海种群二化螟的毒力次序为：阿维菌素、甲氨基阿维菌素>伊维菌素、高效氟氯氰菊酯＞丁烯氟虫腈、氟虫腈、氰戊菊酯、氯氟氰菊酯、溴氰菊酯、高效氯氰菊酯、虫酰肼≥辛硫磷、喹硫磷、呋喃虫酰肼、三唑磷、哒嗪硫磷＞马拉硫磷、毒死蜱、氟硅菊酯>杀虫单。【结论】不同地区二化螟种群对药剂的抗性存在差异,应根据当地的抗性水平有针对性地进行抗性治理。     

田间小菜蛾对9种杀虫剂的抗药性测定

在室内采用浸叶法测定湖南3个蔬菜产区(长沙市长沙县、株洲市茶陵县和永州市祁阳县)的田间小菜蛾对9种药剂的抗药性。试验结果表明,小菜蛾对高效氯氰菊酯抗性达到极高水,对定虫隆、阿维菌素和茚虫威抗性属于高抗水平,对溴虫腈,甲氨基阿维菌素苯甲酸盐和多杀菌素属于中抗水平,对氯虫苯甲酰胺和苏云金杆菌相对敏感。因此,这3个地区的小菜蛾防治应该减少溴虫腈、甲氨基阿维菌素苯甲酸盐和多杀菌素的使用,交替使用氯虫苯甲酰胺和苏云金杆菌,停止阿维菌素、茚虫威、高效氯氟氰菊酯的使用,以便延缓抗药性的产生与发展。     

5种常用杀虫剂对尖喙库蠓的毒性测定

以野外采集的尖喙库蠓成虫为试验对象,通过滤纸接触法,测定了毒死蜱、敌敌畏、溴氰菊酯、高效氯氰菊酯和高氯·甲维盐等5种常用杀虫剂对尖喙库蠓的毒杀效果.结果表明:5种杀虫剂对蠓的毒性差异显著,毒力大小依次为溴氰菊酯毒死蜱高效氯氰菊酯高氯·甲维盐敌敌畏,试虫接触药剂1 h的LC50分别为0.060、0.588、1.741、99.670和600.496 mg·L-1;试虫经药剂处理1 h后在恢复筒观察24 h,其在各种药剂不同处理浓度下增加的死亡数不同;以溴氰菊酯为标准药剂,其相对毒力指数最大.     

北京地区不同桃蚜种群的抗药性研究

 【目的】明确北京地区蔬菜主要害虫桃蚜的抗药性水平。【方法】采用室内生物测定方法检测北京地区6个田间种群和1个室内敏感种群对5种杀虫剂的敏感性,用双向等位特异PCR技术检测击倒抗性水平,并检测桃蚜体内2种抗性相关酶的活力。【结果】结果表明通州、顺义、大兴、海淀、延庆和门头沟6个田间种群和1个敏感种群桃蚜均对高效氯氰菊酯产生了高水平抗性,除延庆和门头沟外,抗性纯合子比例均在90%以上。门头沟、通州和延庆种群的桃蚜对毒死蜱和吡虫啉抗性倍数分别在2.05—4.24和32.03—41.27倍之间。除大兴种群对阿维菌素和甲氨基阿维菌素苯甲酸盐（抗性倍数分别为3.45和2.82）,海淀种群对阿维菌素的敏感性有所降低外（抗性倍数为2.66）,其它种群桃蚜对这2种药剂仍处于较敏感状态（抗性倍数在0.19—1.44）。羧酸酯酶活力与桃蚜对毒死蜱和吡虫啉的抗性倍数间存在明显的正相关性,乙酰胆碱酯酶活力与此2种杀虫剂的抗性倍数成负相关性。【结论】北京地区不同种群的桃蚜几乎对5种常用药剂均产生了不同程度的抗性。防治中应当停止使用高效氯氰菊酯,避免使用毒死蜱,部分地区可以交替使用阿维菌素、甲氨基阿维菌素苯甲酸盐和吡虫啉。     

应用浸叶法评价14 种杀虫剂对棉花粉蚧的毒力

棉花粉蚧（Phenacoccus solenopsis Tinsely）是一种近年来在世界范围内发生危害的入侵性害虫,已给巴基斯坦、印度等多国的棉花生产造成严重损失。2008 年中国大陆发现其发生,目前已在局部地区入侵棉田、造成危害,对中国棉花产业潜在威胁巨大。为了寻找合适的防治药剂,采用浸叶法测定了14 种杀虫剂对棉花粉蚧三龄若虫的毒力。结果表明,高效氯氟氰菊酯、丙溴磷、毒死蜱和阿维菌素相对毒力较高;随着处理时间延长,阿维菌素、甲维盐、多杀霉素和溴虫腈4 种杀虫剂对棉花粉蚧三龄若虫毒力上升明显。药后24 h,14 种药剂的相对毒力由高到低依次为高效氯氟氰菊酯、丙溴磷、毒死蜱、阿维菌素、辛硫磷、丁硫克百威、多杀霉素、溴虫腈、高效氯氰菊酯、灭多威、甲维盐、三唑磷、矿物油、鱼藤酮;药后48 h,14 种药剂的相对毒力由高到低依次为高效氯氟氰菊酯、丙溴磷、阿维菌素、毒死蜱、甲维盐、溴虫腈、多杀霉素、丁硫克百威、辛硫磷、高效氯氰菊酯、灭多威、三唑磷、矿物油、鱼藤酮,与药后24 h的相对毒力顺序略有变化。     

Effects of Droplet Distribution on Insecticide Toxicity to Asian Corn Borers (Ostrinia furnaealis) and Spiders (Xysticus ephippiatus)

Distribution of horizontal boom produced droplets downwards into maize canopies at flowering period and its effects on the efficacies of emamectin benzoate, lambda-cyhalothrin and chlorantraniliprole against the second generation of Asian corn borer (ACB) larvae and their toxicity to spiders were studied. When insecticides were sprayed downwards into the maize canopies, randomly filtering out droplets by upper leaves led to great variations of droplet coverage and density within the canopies. Consequently, the efficacies of lambda-cyhalothrin and emamectin benzoate against ACB larvae were decreased because of randomly filtering out droplets by upper leaves. But field investigation showed that lambda-cyhalothrin was extremely toxic to hunting spiders, Xysticus ephippiatus, and not suitable to IPM programs in regulation of the second generation of ACB. Therefore, randomly filtering out droplets by upper leaves decreased lambda-cyhalothrin's efficacy against ACB larvae, but did little to decrease its toxicity to X. ephippiatus. Amamectin benzoate can reduce the populations of X. ephippiatus by 58.1-61.4%, but the populations can recover at the end of the experiment. Chlorantraniliprole was relatively safe to X. ephippiatus. It only reduced the populations of X. ephippiatus by 22.3-33.0%, and the populations can totally recover 9 d after application.     

Characterization of carboxylesterase PxαE8 and its role in multi-insecticide resistance in Plutella xylostella (L.)

Carboxylesterase (CarE) was considered as important phase-I detoxifying enzymes which participated in detoxification of different types of insecticides. Up-regulation of CarE genes has been proved playing a major role in insecticide resistance in many pest insects, but its involvement in resistance to insecticides in Plutella xylostella has been rarely reported. In this study, a CarE cDNA named PxαE8 was identified in P. xylostella, which has an open reading frame of 1 599 nucleotides and putatively encodes 532 amino acids. The investigation of spatial expression profiles of PxαE8 revealed that it was expressed in all developmental stages, especially in larvae and adults. The body part/tissue-specific expression profiles showed that the PxαE8 mainly expressed in fat body, malpighian tubule and hemolymph of larvae. Further, the relative expression of PxαE8 in two multi-resistant field populations, Hainan (HN) and Guangdong (GD) populations, was found 24.4- and 15.5-fold higher than that in susceptible population, respectively. Knockdown of PxαE8 by RNA interference dramatically increased the mortalities of larvae of HN population treated with LC₅₀ of beta-cypermethrin and phoxim by 25.3 and 18.3%, respectively. These results suggested that up-regulation of PxαE8 was involved in resistance to both beta-cypermethrin and phoxim in P. xylostella, which shed light on further understanding of molecular mechanisms of multi-insecticide-resistance in P. xylostella and other pest insects.     

6种杀虫剂对小菜蛾的室内毒力及田间防效

[目的]筛选出防治小菜蛾的有效药剂。[方法]采用点滴法测定了甲氨基阿维菌素苯甲酸盐等6种杀虫剂对小菜蛾3龄幼虫的室内毒力,采用对水叶面喷雾法测定了其中杀虫效果较好的5种制剂对小菜蛾的田间防效。[结果]甲氨基阿维菌素苯甲酸盐对小菜蛾3龄幼虫的室内毒力最高,其LC50为0.17 mg/L;其次为氯虫苯甲酰胺、虫螨腈及多杀菌素,其LC50依次为0.44、0.84、1.25 mg/L;丁醚脲和氰氟虫腙的毒力最低,其LC50分别为10.43和11.17 mg/L。田间施药后6 d,5%氯虫苯甲酰胺SC 1 000倍液对小菜蛾的防效较好,高达82.33%;5.7%甲氨基阿维菌素苯甲酸盐WG 2 500倍液、10%虫螨腈SC 1 500倍液、25%丁醚脲EC 1 500倍液及2.5%多杀菌素EW1 500倍液难以控制其危害,防效分别为60.50%、58.02%、55.64%和55.40%。[结论]为小菜蛾的有效控制提供了理论依据。     

浙江菜区斜纹夜蛾对几类杀虫剂的敏感性

为明确浙江菜区斜纹夜蛾对主要杀虫剂的抗药性发展趋势,采集了浙江三门和萧山地区田间斜纹夜蛾,监测其对11种杀虫剂的敏感性水平。结果表明,三门种群和萧山种群对这些杀虫剂的敏感性存在明显差异,且萧山种群对测试药剂的敏感性高于三门种群。参考抗性诊断剂量（田间推荐浓度）处理后存活率和11种杀虫剂LC99致死浓度与田间推荐浓度的比值,推断三门种群对氯虫苯甲酰胺和溴虫腈敏感,对茚虫威、甲氨基阿维菌素苯甲酸盐、啶虫隆、丁醚脲和多杀菌素的敏感性下降,对虫酰肼、乙基多杀菌素、阿维菌素和高效氯氰菊酯已产生抗性;同样,萧山种群对氯虫苯甲酰胺、溴虫腈和多杀菌素敏感,对甲氨基阿维菌素苯甲酸盐、丁醚脲、啶虫隆、乙基多杀菌素、茚虫威、阿维菌素敏感性下降,对虫酰肼和高效氯氰菊酯产生抗性。因此,浙江菜区斜纹夜蛾对大部分监测杀虫剂的抗性正在形成,已产生抗性的高效氯氰菊酯、阿维菌素、虫酰肼应暂停使用1~2年;其余药剂则需要控制用药次数和采用不同种类杀虫剂轮用、混用的方式以延缓抗药性的产生。     

8种药剂对斯密二鬃蓟马成虫的室内毒力

[目的]筛选防治斯密二鬃蓟马的有效药剂。[方法]在室内采用浸叶法测定8种药剂对斯密二鬃蓟马成虫的毒力。[结果]药剂处理24 h后,阿立卡、联苯菊酯、烯啶虫胺、吡虫啉、氰氟虫腙对斯密二鬃蓟马成虫的LC50分别为5.505 3、7.945 4、42.747 1、69.593 3、578.344 1 mg/L;药剂处理12 h后,甲维盐、虫螨腈·甲氨基阿维菌素苯甲酸盐、毒死蜱对斯密二鬃蓟马成虫的LC50分别为0.019 0、0.071 6、0.256 5 mg/L。[结论]8种杀虫剂中甲维盐、毒死蜱、虫螨腈·甲氨基阿维菌素苯甲酸盐对斯密二鬃蓟马成虫有较好的毒杀效果。甲维盐、虫螨腈·甲氨基阿维菌素苯甲酸盐属于生物源农药,且毒性较高,是高级花卉、无公害花卉生产中防治斯密二鬃蓟马的较理想药剂。     

亚洲玉米螟的抗药性监测及双酰胺类药剂抗性靶标分子检测

【目的】 研究监测和检测亚洲玉米螟田间种群对双酰胺类等药剂的抗性,为指导田间合理用药及抗性治理提供依据。【方法】 于2018和2019年,采用人工饲料浸药法,测定新疆乌鲁木齐市、伊宁市、疏勒县、泽普县和昌吉市亚洲玉米螟田间种群对氯虫苯甲酰胺、溴氰虫酰胺、阿立卡(噻虫嗪·高效氯氟氰菊酯)和亮泰(阿维菌素·氯虫苯甲酰胺)的抗性水平。利用定量PCR分析不同田间种群鱼尼丁受体(ryanodine receptor,RyR)基因表达量的变化及利用PCR扩增检测RyR分子突变。【结果】 2018年的测试种群中,与相对种群相比,疏勒种群对氯虫苯甲酰胺为敏感性下降,对阿立卡达到中等水平抗性,抗性倍数(RR)分别为3.67和20.17倍;伊宁种群分别对溴氰虫酰胺、阿立卡产生了15.26和14.10倍的中等水平抗性;泽普种群对阿立卡和亮泰具有中等水平抗性,RR分别为10.97和13.48倍。2019采集的田间种群中,与敏感种群JZ-S相比,除了疏勒种群对溴氰虫酰胺为敏感性降低,其它3个种群(乌鲁木齐市、伊宁市和昌吉市)都产生了低至极高水平的抗性,RR分别为3.61、8.14、96.49和1 429倍。2018年新疆亚洲玉米螟各种群的RyR基因表达量无显著差异,而2019年昌吉、伊宁种群的RyR基因表达量显著升高(4.04、3.86倍);昌吉种群RyR第1 424位谷氨酸(E)替换为天冬氨酸的突变(E1424D),突变频率为30%。【结论】 新疆亚洲玉米螟田间种群对双酰胺类杀虫剂产生低至中等水平抗性,其抗性与鱼尼丁受体基因的表达量增加和突变有关。     

福州地区黄曲条跳甲的抗性监测

采用浸叶法对福建福州建新和洪塘、闽候荆溪菜区黄曲条跳甲(Phyllotretastriolata)抗药性的时空动态变化进行了监测.与网室内相对敏感品系相比,3个菜区的黄曲条跳甲对敌敌畏、毒死蜱、辛硫磷、乙酰甲胺磷、丁硫克百威、氰戊菊酯、氯氰菊酯、高效氯氰菊酯、溴氰菊酯、三氟氯氰菊酯和锐劲特均产生不同程度的抗性,且不同菜区黄曲条跳甲抗药性水平差异较大.2001年11月至2003年1月的监测结果显示,建新菜区黄曲条跳甲对敌敌畏、氰戊菊酯和氯氰菊酯的抗性水平在1年内不同时期变化较大.根据抗性监测结果,对抗性治理对策进行了讨论.     

防治大豆主要害虫药剂与方法筛选试验

通过田间小区试验,比较几种杀虫剂及两种防治方法对大豆蚜虫及大豆食心虫的防治效果,筛选出防效较好的3种杀虫剂:绝蚜、利镖和甲维盐,为大豆害虫防治提供依据。     

20种杀虫剂对稻纵卷叶螟高龄幼虫的效果

20种杀虫剂对稻纵卷叶螟高龄幼虫的试验表明:24h内防治效果最好的杀虫剂品种是阿维菌 素,其次是锐劲特及赛丹。拟除虫菊酯类杀虫剂功夫、灭扫利及高效氯氰菊酯,以及沙蚕毒系的杀虫 双仍能有效控制稻纵卷叶螟的为害。有机磷类杀虫剂三唑磷、乙酰甲胺磷、辛硫磷、乐斯本、甲胺磷、 甲基1605及敌敌畏以及三种含有机磷的混剂对稻纵卷叶螟高龄幼虫几乎无效。同一杀虫剂对不同 地区的稻纵卷叶螟幼虫的防治效果有差异。     

福建省水稻稻纵卷叶螟田间种群对6种杀虫剂的敏感性测定

[目的]测定6种杀虫剂对福建省稻纵卷叶螟田间种群的毒力及田间防治效果,为稻纵卷叶螟持续控制提供科学依据.[方法]采用浸叶法测定氯虫苯甲酰胺、乙基多杀菌素、茚虫威、阿维菌素、甲氨基阿维菌素和毒死蜱对福建省3个不同地理种群(福建福州、闽侯和沙县)稻纵卷叶螟3龄幼虫的室内毒力;在田间稻纵卷叶螟1~2龄幼虫高峰期,采用田间茎叶喷雾法开展氯虫苯甲酰胺、乙基多杀菌素、茚虫威、阿维菌素、甲氨基阿维菌素和毒死蜱等6种杀虫剂对稻纵卷叶螟的田间防治效果试验.[结果]室内毒力测定结果显示,3个地理种群稻纵卷叶螟对同一种杀虫剂的敏感性均以福州种群最敏感,其次是闽侯和沙县种群;6种供试杀虫剂对同一种群稻纵卷叶螟3龄幼虫的毒力排序为:阿维菌素>乙基多杀菌素>甲氨基阿维菌素>氯虫苯甲酰胺>茚虫威>毒死蜱.在试验设计剂量范围内,6种供试药剂对稻纵卷叶螟均具有良好的田间控制作用,药后14d的保叶效果为80.02%~88.81%,杀虫效果为82.99%~95.38%.[结论]福建省稻纵卷叶螟尚未对氯虫苯甲酰胺、乙基多杀菌素、茚虫威、阿维菌素、甲氨基阿维菌素和毒死蜱等6种杀虫剂产生明显的抗药性,6种药剂可有效控制稻纵卷叶螟的为害.     

Biochemical Mechanism of Chlorantraniliprole Resistance in the Diamondback Moth,Plutella xylostella Linnaeus

The insecticide chlorantraniliprole exhibits good efficacy and plays an important role in controlling the diamondback moth, Plutella xylostella Linnaeus. However, resistance to chlorantraniliprole has been observed recently in some field populations. At present study, diamondback moths with resistance to chlorantraniliprole (resistant ratio (RR) was 82.18) for biochemical assays were selected. The assays were performed to determine potential resistance mechanisms. The results showed that the selected resistant moths (GDLZ-R) and susceptible moth could be synergized by known metabolic inhibitors such as piperonyl butoxide (PBO), triphenyl phosphate (TPP) and diethyl-maleate (DEM) at different levels (1.68–5.50-fold and 2.20–2.89-fold, respectively), and DEM showed the maximum synergism in both strains. In enzymes assays, a high level of glutathione-S-transferase (GST) was observed in the resistant moth, in contrast, moths that are susceptible to the insecticide had only 1/3 the GST activity of the resistant moths. The analysis of short-term exposure of chlorantraniliprole on biochemical response in the resistant strain also showed that GST activity was significantly elevated after exposure to a sub-lethal concentration of chlorantraniliprole (about 1/3 LC₅₀, 12 mg L⁻¹) 12 and 24 h, respectively. The results show that there is a strong correlation between the enzyme activity and resistance, and GST is likely the main detoxification mechanism responsible for resistance to chlorantraniliprole in P. xylostella L., cytochrome P450 monooxygenase (P450) and carboxy-lesterase (CarE) are involved in to some extent.     

抗高效氯氟氰菊酯甜菜夜蛾近等基因系的交互抗性和种群适合度

 测定了对高效氯氟氰菊酯不同抗性水平的近等基因系高抗种群（NILs-RR）和低抗种群（NILs-RS）对13种杀虫剂的交互抗性，结果表明高抗种群对高效氯氰菊酯、氰戊菊酯、高效氟氯氰菊酯、甲氰菊酯和溴氰菊酯的交互抗性倍数在15.2～92.6之间；对氟虫腈，阿维菌素、灭多威和甲胺基阿维菌素也存在14.1～67.5倍的较高交互抗性；而对毒死蜱、溴虫腈、虫酰肼及辛硫磷的交互抗性较低，在3.0～7.6倍之间。低抗种群对氟虫腈和阿维菌素存在较明显的交互抗性，在13.3～14.3倍之间；对高效氯氰菊酯、氰戊菊酯、灭多威、溴虫腈和甲胺基阿维菌素有一定程度的交互抗性（5.8～9.9倍）；对高效氟氯氰菊酯、溴氰菊酯和甲氰菊酯的交互抗性较低（2.6～2.9倍）；对辛硫磷、毒死蜱和虫酰肼则没有明显的交互抗性（1.7～1.8倍）。对构建的甜菜夜蛾敏感种群（SS）、近等基因系高效氯氟氰菊酯抗性种群(NILs-RR)和近等基因系低抗性种群(NILs-RS)生命表分析表明，以SS种群为参比，NILs-RS、NILs-RR种群的相对适合度分别为0.870、0.893，抗高效氯氟氰菊酯不同基因型甜菜夜蛾SS，NILs-RS和NILs-RR三种群净增殖率分别为624.7, 543.6和557.8，无显著差异，表明高效氯氟氰菊酯的抗药性未引发甜菜夜蛾适合度变化。综合上述研究结果可见甜菜夜蛾对高效氯氟氰菊酯产生抗药性后，与其它菊酯类药剂、氟虫腈和阿维菌素存在较高水平交互抗性，此类药剂间不宜混用或轮用；与辛硫磷、毒死蜱和虫酰肼的交互抗性均较低，可以混用或轮用。在高抗地区也可以通过引入敏感种群进行抗性稀释的方法治理甜菜夜蛾对菊酯类杀虫剂的抗性。     

几种杀线剂对南方根结线虫的田间药效试验

[目的]测定8种药剂对广西不同地区不同作物南方根结线虫的田间防效,并探讨其中高效药剂在不同地区、不同作物上药效的稳定性,为生产上推广应用提供依据.[方法]采用沟施、灌根的施药方式,测定噻唑磷、阿维菌素、厚壁孢轮枝菌、丁硫克百威、辛硫磷、线虫净、毒死蜱及甲维盐等8种药剂对广西不同地区香蕉、甘蔗、番茄、黄瓜、西瓜、烟草等作物南方根结线虫的田间防效.[结果]10%噻唑磷颗粒剂和0.2%甲维盐乳油对南方根结线虫的防效最好,平均防效分别达到86.16%和85.24%,且在不同地区、不同寄主作物上表现良好的稳定性;其次是1.8%阿维菌素乳油和5%丁硫克百威颗粒剂,防效分别为81.47%和77.26%;传统防治药剂50%辛硫磷乳油、5%线虫净颗粒剂、15%毒死蜱也有一定的杀线虫活性,防效在70%左右;生防菌剂5%厚壁孢轮枝菌粉剂的防效较差,平均为50.97%.[结论]噻唑磷、甲维盐、阿维菌素和J硫克百威对不同地区不同作物南方根结线虫均有较好的防效,4种药剂均可在生产上推广应用.