25%噻·多·唑醚种子处理悬浮剂及成膜助剂的制备与性能
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摘要
为制备直播棉种子用25%噻虫嗪·多菌灵·吡唑醚菌酯种子处理悬浮剂(25%噻·多·唑醚FS),分别采用流点法及正交试验设计对主要助剂进行筛选,并合成了可溶性淀粉–苯乙烯二元共聚物成膜剂,对25%噻·多·唑醚FS质量指标进行了测定,评价其对棉花种子发芽率、幼苗叶绿素、游离脯氨酸含量的影响。所制备制剂中,有效成分噻虫嗪、多菌灵和吡唑醚菌酯分别为10%、10%和5%,润湿分散剂W600和D800、黏度调节剂黄原酸胶和硅酸镁铝的质量分数分别为2.5%和4.0%、0.18%和0.30%,防冻剂乙二醇5%,色浆海舒液体红2R 2%。经测定,25%噻·多·唑醚FS黏度为204.21 mPa·s,粒径D90、D50、D10分别为1.25、0.82、0.35μm,离心沉淀率为8.34%,悬浮率96.02%,热贮析水率4.72%,脱落率为3.35%。成膜剂的成膜时间为11.33 min,包衣均匀度为91.67%。以药种比为1∶50处理棉种,发芽率为95.67%,比空白对照提高了1.78%;棉幼苗叶绿素含量增加了70.54%;游离脯氨酸含量增加了77.55%。25%噻·多·唑醚种子处理悬浮剂成膜稳定性好,对棉花种子安全,发芽率高,有利于促进棉花幼苗发育生长。
To prepare 25% thiamethoxazine carbendazim pyraclostrobin suspension concentrate(25% thi car pyr FS) for cotton seeds treatment for direct seeding,the main additives in the formulation were screened by flow point method and orthogonal design.The soluble starch-styrene binary copolymer film former was synthesized and the performance of the film former was determined.The quality index of 25% thi car pyr FS was determined and its effect on cotton seed germination rate,seedling chlorophyll content and free proline content was evaluated.The active ingredients thiamethoxazine,carbendazim,and pyraclostrobin accounted for 10%,10%,and 5%,respectively.The mass fractions of wetting and dispersing agents W600 and D800 were 2.5% and 4.0%,respectively and the mass fractions of viscosity modifiers xanthan gum and magnesium aluminum silicate were 0.18% and 0.30%,respectively.The mass fraction of antifreeze glycol was 5%,of color paste Haishu liquid red 2 R 2%.The viscosity of thi car pyr FS was 204.21 mPa·s,the particle size D90,D50,D10 were 1.25,0.82,0.35 μm,the centrifugal sedimentation rate was 8.34%,the suspension rate was 96.02%,the water extraction rate was 4.72%,and the shedding rate was 3.35%.The film forming time of the film former was 11.33 min,and the uniformity of coating was 91.67%.When the drug to species ratio was 1∶50,the germination rate was 95.67%,under which the germination rate increased by 1.78%,the chlorophyll content of cotton seedlings increased by 70.54%,and the free proline content increased by 77.55%,compared to the blank control.The prepared seed treatment suspension 25% thi car pyr FS has good film formation stability,and is safe to cotton seeds,which can ensure high germination rate and promote the growth and development of cotton seed.
To prepare 25% thiamethoxazine carbendazim pyraclostrobin suspension concentrate(25% thi car pyr FS) for cotton seeds treatment for direct seeding,the main additives in the formulation were screened by flow point method and orthogonal design.The soluble starch-styrene binary copolymer film former was synthesized and the performance of the film former was determined.The quality index of 25% thi car pyr FS was determined and its effect on cotton seed germination rate,seedling chlorophyll content and free proline content was evaluated.The active ingredients thiamethoxazine,carbendazim,and pyraclostrobin accounted for 10%,10%,and 5%,respectively.The mass fractions of wetting and dispersing agents W600 and D800 were 2.5% and 4.0%,respectively and the mass fractions of viscosity modifiers xanthan gum and magnesium aluminum silicate were 0.18% and 0.30%,respectively.The mass fraction of antifreeze glycol was 5%,of color paste Haishu liquid red 2 R 2%.The viscosity of thi car pyr FS was 204.21 mPa·s,the particle size D90,D50,D10 were 1.25,0.82,0.35 μm,the centrifugal sedimentation rate was 8.34%,the suspension rate was 96.02%,the water extraction rate was 4.72%,and the shedding rate was 3.35%.The film forming time of the film former was 11.33 min,and the uniformity of coating was 91.67%.When the drug to species ratio was 1∶50,the germination rate was 95.67%,under which the germination rate increased by 1.78%,the chlorophyll content of cotton seedlings increased by 70.54%,and the free proline content increased by 77.55%,compared to the blank control.The prepared seed treatment suspension 25% thi car pyr FS has good film formation stability,and is safe to cotton seeds,which can ensure high germination rate and promote the growth and development of cotton seed.
引文
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[13]黄啟良,李风敏,袁会珠,等.悬浮剂润湿分散剂选择方法研究[J].农药学学报,2001,3(3):66-70.
[14]王伟昌,张宪鹏,张大侠,等.均匀设计和响应面法联用优化30%噻虫胺悬浮剂配方[J].农药学学报,2016,18(2):249-257.
[15]李北兴,王伟昌,张大侠,等.正交设计和均匀设计在优化噻虫胺悬浮剂物理稳定性上的应用[J].中国农业科学,2015,48(2):280-292.
[16]张浩,高友丽,陈勇,等.水稻种衣剂对秧苗生理生化及叶绿素荧光参数的影响[J].西北植物学报,2015,35(2):315-321.
[17]房锋,姜兴印,纪春涛,等.种衣剂对山农饲玉7号玉米幼苗生长和相关酶活性的影响[J].农药学学报,2009,11(1):98-103.
[18]齐麟,王昱翔,王宁,等.40%噻虫嗪·吡唑醚菌酯悬浮种衣剂成膜及生物学特性[J].中国农业科学,2017,50(9):1624-1634.
[2]高伟,张西岭.长江流域棉花生产现状及“十三五”发展建议[J].中国棉花,2016,43(1):3-7.
[3]张焕囡.长江流域棉区转基因棉花的生产布局与效益分析[D].武汉:湖北大学,2013.
[4]谢陈灵,李瑞莲,刘爱玉,等.栽培模式对棉花干物质生产和产量形成的影响[J].湖南农业大学学报(自然科学版),2018,44(3):240-243.
[5]陈传强,蒋帆,张晓洁,等.我国棉花生产全程机械化生产发展现状、问题与对策[J].中国棉花,2017(12):1-4.
[6]匡政成,肖才升,陈浩东,等.洞庭湖植棉区棉花生产全程机械化的实践[J].中国棉花,2015,42(5):10-11,14.
[7]GAUTEPLASS J,CHAUDHARY K,KOVSCEK A R,et al.Pore-level foam generation and flow for mobility control in fractured systems[J].Colloids&Surfaces APhysicochemical&Engineering Aspects,2015,468:184-192.
[8]周美兰,唐启源,邹应斌,等.种子包衣剂对棉花育苗的影响[J].湖南农业大学学报(自然科学版),2006,32(4):357-361.
[9]熊远福,文祝友,江巨鳌,等.农作物种衣剂研究进展[J].湖南农业大学学报(自然科学版),2004,30(2):187-192.
[10]蔡志平,彭延,张栋海,等.高巧60%悬浮种衣剂拌种对棉花苗期害虫的防治效果[J].中国棉花,2013,40(4):26-28.
[11]HOWELL C R,DEVAY J E,GARBER R H,et al.Field control of cotton seedling diseases with Trichoderma virens in combination with fungicide seed treatments[J].Journal of Cotton Science,1997,1(1):15-20.
[12]TU L,HE Y H,SHAN C H,et al.Preparation of microencapsulated,Bacillus subtilis,SL-13 seed coating agents and their effects on the growth of cotton seedlings[J].BioMed Research International,2016,2016:1-7.
[13]黄啟良,李风敏,袁会珠,等.悬浮剂润湿分散剂选择方法研究[J].农药学学报,2001,3(3):66-70.
[14]王伟昌,张宪鹏,张大侠,等.均匀设计和响应面法联用优化30%噻虫胺悬浮剂配方[J].农药学学报,2016,18(2):249-257.
[15]李北兴,王伟昌,张大侠,等.正交设计和均匀设计在优化噻虫胺悬浮剂物理稳定性上的应用[J].中国农业科学,2015,48(2):280-292.
[16]张浩,高友丽,陈勇,等.水稻种衣剂对秧苗生理生化及叶绿素荧光参数的影响[J].西北植物学报,2015,35(2):315-321.
[17]房锋,姜兴印,纪春涛,等.种衣剂对山农饲玉7号玉米幼苗生长和相关酶活性的影响[J].农药学学报,2009,11(1):98-103.
[18]齐麟,王昱翔,王宁,等.40%噻虫嗪·吡唑醚菌酯悬浮种衣剂成膜及生物学特性[J].中国农业科学,2017,50(9):1624-1634.
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