66％氟虫酰胺·氟虫腈WG防治水稻二化螟和稻纵卷叶螟效果

防治水稻二化螟和稻纵卷叶螟田间试验表明：66％氟虫酰胺·氟虫腈WG对水稻二化螟和稻纵卷叶螟具有优良的防治效果,39．6-49．5g a．i．／hm^2防治二化螟的保苗效果为75．42％-83．05％,杀虫效果78．95％-84．12％;防治稻纵卷叶螟的保叶效果为77．51％～84．34％,杀虫效果89．55％-92．89％。     

66%氟虫酰胺·氟虫腈WG防治水稻二化螟和稻纵卷叶螟效果

防治水稻二化螟和稻纵卷叶螟田问试验表明:66%氟虫酰胺·氟虫腈WG对水稻二化螟和稻纵卷叶螟具有优良的防治效果,39.6～49.5 g g.a.i./hmM2防治二化螟的保苗效果为75.42%～83.05%,杀虫效果78.95%～84.120%;防治稻纵卷叶螟的保叶效果为77.51%～84.34%.杀虫效果89.55%～92.89%.     

毒死蜱480g／L乳油对稻纵卷叶螟的田间防治效果评价

对毒死蜱480g/L乳油防治水稻稻纵卷叶螟田间效果进行了试验，结果表明，该药剂对稻纵卷叶螟有较好的防治效果。当毒死蜱有效成分用量为150g/hm^2、300g/hm^2、600g/hm^2时，其对水稻稻纵卷叶螟的防效分别为66．24％、72．66％、83．88％。     

20％甲维·毒死蜱WP对稻纵卷叶螟的药效试验

为寻求防治顽固性害虫稻纵卷叶螟的高效农药,通过室内配方筛选试验,甲维盐与毒死蜱复配1：99配比对稻纵卷叶螟杀虫活性最高,共毒系数206．65,增效显著。田间药效试验中,20％甲维·毒死蜱WP速效与持效性均好,亩用80～100g,对稻纵卷叶螟杀虫效果为88．6％～94．3‰保叶效果81．9％,对水稻无不良影响,是替代高毒农药的优良药种。     

几种药剂防治稻纵卷叶螟药效试验

近年来，稻纵卷叶螟在本地区连续大发生，对水稻生产构成严重威胁，成为本地区水稻虫害防治中又一突出问题。今年二代稻纵卷叶螟迁入峰期特早，迁入量比常年增加30多倍，导致二、三代稻纵卷叶螟持续大发生，三代水稻螟害自叶率高达50％以上。为了寻找有效药种，今年对多种药剂进行了防治三代稻纵卷叶螟药效筛选试验。     

20%甲维·毒死蜱WP对稻纵卷叶螟的药效试验

为寻求防治顽固性害虫稻纵卷叶螟的高效农药,通过室内配方筛选试验,甲维盐与毒死蜱复配1:99配比对稻纵卷叶螟杀虫活性最高,共毒系数206.65,增效显著。田间药效试验中,20%甲维.毒死蜱WP速效与持效性均好,亩用80～100g,对稻纵卷叶螟杀虫效果为88.6%～94.3%,保叶效果81.9%,对水稻无不良影响,是替代高毒农药的优良药种。     

扑虫净乳油防治水稻害虫田间药效试验

通过25％扑虫净乳油对水稻二化螟和稻纵卷叶螟的田间药效试验，明确了每667m^2施用扑虫净60-70mL处理可有效防治水稻二化螟和稻纵卷叶螟。     

甲维盐2．5％WDG防治水稻稻纵卷叶螟药效试验

评价了甲维盐2．5％WDG对水稻稻纵卷叶螟的田间防治效果。试验结果表明,使用剂量为10-20g／667m^2时,甲维盐2．5％WDG对稻纵卷叶螟的防治具有速效性好、有效期长、药效稳定,且对水稻安全等特点,7d后防效能达到92％以上,其效果明显高于2％阿维菌素EC,是替代高毒杀虫剂的理想产品。     

多杀霉素对稻纵卷叶螟室内毒力测定及高龄幼虫田间药效试验

多杀霉素是一种大环内酯类无公害高效生物杀虫剂。在室内采用浸叶法,测定多杀霉素对稻纵卷叶螟幼虫的活性,结果表明,90.0%多杀霉素原药对稻纵卷叶螟3龄幼虫具有较高的杀虫活性,LC50=0.0668mg/L。田间试验结果表明,2.5%多杀霉素悬浮剂对稻纵卷叶螟高龄幼虫具有较好的防治效果,药后1d的杀虫效果为65.51%～86.80%,药后5d的杀虫效果为76.26%～89.47%,对水稻安全,对天敌影响较小。     

20%三唑磷乳油田间防治水稻纵卷叶螟试验

２０％三唑磷乳油田间防治水稻纵卷叶螟试验周群喜，姜海洲，王泉章，马建华（江苏省东台市稻区病虫测报站２２４２００）稻纵卷叶螟是水稻生长后期的主要害虫之一。今年，由于二代纵卷叶螟发生量大、残留虫量较高，三代纵卷叶螟发生期间外地虫源迁人量大，从而导致了我市...     

不同药剂对稻纵卷叶螟的防治试验

在五(3)代稻纵卷叶螟2、3龄幼虫高峰期进行防治试验,结果表明,每667m2选用新农宝80 ml、功夫30~50 ml、纵卷清80g等对稻纵卷叶螟有优良的杀虫及保叶效果,可大面积推广应用。而杀虫单及螟盾(三唑磷) 的杀虫及保叶效果很差,因此,在田间稻纵卷叶螟幼虫3龄或3龄以上时不宜使用。     

阿维菌素与甲氧虫酰肼混配对稻纵卷叶螟的联合作用研究

为筛选阿维菌素与甲氧虫酰肼对稻纵卷叶螟的最佳混配比例,采用喷雾法和稻茎浸渍法对阿维菌素、甲氧虫酰肼单剂进行了毒力测定,并将两者按不同质量比混配,进行室内联合毒力测定。试验测定结果显示:阿维菌素、甲氧虫酰肼按不同比例混配,对稻纵卷叶螟幼虫均表现出明显的增效作用。两者以质量比1∶4混配时,共毒系数最高达到178.09,增效作用最为显著。     

邗江区水稻害虫抗药性监测及治理技术研究

2012-2014年,开展灰飞虱、褐飞虱、稻纵卷叶螟和二化螟对几种常用药剂的室内抗药性监测和田间药效验证试验,并提出抗性治理措施。结果表明:示范区内可轮换使用噻虫嗪、烯啶虫胺和吡蚜酮防治灰飞虱,停用毒死蜱;烯啶虫胺、呋虫胺、氟啶虫胺腈可轮换用于防治褐飞虱,限用吡蚜酮,停用吡虫啉、噻嗪酮、噻虫嗪;阿维菌素、三唑磷、氯虫苯甲酰胺可轮换用于防治二化螟,限用毒死蜱、杀虫单;氯虫苯甲酰胺对二化螟的田间防效较理想,但对稻纵卷叶螟的防效有待进一步试验验证。     

5%甲氨基阿维菌素苯甲酸盐水分散粒剂防治水稻稻纵卷叶螟田间药效试验

5%甲氨基阿维菌素苯甲酸盐WG防治稻纵卷叶螟的田间药效实验结果表明,在有效成份施用量为12 g/hm2时,药后1 d,2 d,6 d的防治效果分别为62.57%,69.57%,84.70%;在施用量为18 g/hm2时,药后1 d,2 d,6 d的防治效果分别为69.26%,82.14%,93.72%。试验药剂在整个试验过程中对3～5龄稻纵卷叶螟幼虫表现出优异的杀虫效果,能够很好地控制害虫的危害。     

3%甲维盐微乳剂防治水稻稻纵卷叶螟田间药效试验

3%甲维盐微乳剂防治稻纵卷叶螟的田间药效实验结果表明,每亩施用有效成分1.35g,药后1d、3d、7d的防治效果分别为70.33%、76.09%、80.95%;施用2.25g,药后1d、3d、7d的防治效果分别为82.57%、86.75%、90.34%。对照药剂40%毒死蜱乳油亩用有效成分30.0g,药后1d、3d、7d的防治效果分别为65.67%、70.34%、73.23%。试验药剂在施药后1d,防治效果即达到70%以上,说明该药剂作用速度快,并且在施药后7d还能有效控制害虫的危害,说明该药剂持效期较长。     

Distribution and degradation kinetics of cyhalodiamide in Chinese rice field environment

Cyhalodiamide is a novel agrochemical which is effective against Lepidoptera pests, including Cnaphalocrocis medinalis, Chilo suppressalis, Pieris rapae, Plutella xylostella, Helicoverpa armigera, etc. In the study, a fast and accurate analytical method was developed to detect cyhalodiamide in Chinese typical rice field environment by a modified QuEChERS (Quick, Easy, Cheap, Effective, Rugged, Safe) method with UPLC-MS/MS (ultra-high performance chromatography-tandem mass spectrometry). The mean recoveries of cyhalodiamide varied from 73.5% to 107.5%, with the RSDs from 1.2% to 10.7%. The limits of determination (LODs) were 0.0005 mg·kg^-1, and the limits of quantitation (LOQs) were from 0.002 to 0.01 mg·kg^-1 in all five matrices. This method was used to determine cyhalodiamide residues for studies of the distribution and degradation kinetics in rice field environment. The field trials results showed that cyhalodiamide was easily degradable and the half-lives were 4.2-13.6 d in rice straw, 8.77 d in paddy soil and 5.37-8.45 d in paddy water, respectively. The final residues of cyhalodiamide in brown rice were below 0.35 mg·kg^-1. The used dosage of 33.75 g·hm^-2 with pre-harvest interval (PHI) of 21 d and the maximum residue limit (MRL) of cyhalodiamide in rice at 0.1 mg·kg^-1 were recommended, which would be safe to human health and environment. The developed analytical method will be useful to monitor cyhalodiamide residues and safety evaluation in rice environment.     

除草腐脲颗粒剂防除稻田杂草的效果及其推广应用

除草腐脲颗粒剂是一种新研制的稻田新型药肥除草剂,集除草肥田增产等特点,水稻移(抛)栽后3～5d,每667m2用除草腐脲颗粒剂15kg,对稻田杂草的防效可达90%以上,并对稻苗安全无药害,促水稻壮苗多分蘖,增产10%以上,明显优于常规除草剂,值得在水稻上推广应用。     

EFFECTS OF DRYING ON HEAD RICE YIELD USING FLUIDIZATION TECHNIQUE

ABSTRACT

Experimental results of fluidized bed paddy drying using high inlet air temperatures (140 and 150 °C) showed that head rice yield could be increased to a maximum value at a range of paddy final moisture contents of 19 to 22 % wet-basis. In case of reducing moisture content of paddy to lower than 19 % wet-basis, head rice yield of tempered paddy was higher than that of no-tempered one. Initial moisture contents of paddy that could increase head rice yield were in a range of 23 to 31 % wet-basis. As initial moisture content increased head rice yield increased. Whiteness of dried paddy was mostly accepted. However, if tempering temperature was higher than 60 °C, it may cause the problems for trade.