赵向阳　谢吉先　王书勤

摘要

[目的]明确杜邦阿砣拌种对花生病害的防治效果，探讨其防治效果较佳的用法和用量。[方法]以特色花生“泰花4号”为试验材料，通过小区试验研究杜邦阿砣拌种对花生根腐病、茎腐病和中期白绢病的防治效果。[结果]使用杜邦阿砣450 ml/hm2+600 g/L吡虫啉悬浮种衣剂450 ml/hm2，对水4 500 ml/hm2， 拌种仁195 kg/hm2，对花生苗期根腐病、茎腐病的防治效果较好；各处理对白绢病的控制效果均较差，但随着杜邦阿砣用量的增加，病株数和病株率有降低趋势。[结论]试验结果为杜邦阿砣的推广应用提供了理论依据。

关键词 杜邦阿砣；种仁拌种；根腐病；茎腐病；白绢病；防治效果

中图分类号 S565.2 文献标识码 A 文章编号 0517-6611（2015）15-137-02

Control Effect of 22.5% Picoxystrobin SC against Peanut Diseases

ZHAO Xiangyang， XIE Jixian， WANG Shuqin

（Taizhou Institute of Dry Land Crop， Taizhou， Jiangsu 225433）

Abstract [Objective] Control effect of 22.5% Picoxystrobin SC against peanut diseases was understood to find out the optimal application and dose. [Method] Peanut ‘Taihua 4 was taken as tested material， and control effects of 22.5% Picoxystrobin SC against peanut root rot， stalk rot and southern blight were studied through plot experiment. [Result] After seed kernel was dressed with 22.5% Picoxystrobin SC 450 ml/hm2 and 600 g/L Imidacloprid flowable concentrate for seed coating 450 ml/hm2 according to 195 kg/hm2 of seed kernel dressing and 4 500 ml/hm2 of the diluted time， good control effects against peanut root rot and stalk rot were received. All treatments had bad control effects on southern blight， but the rate of disease plants decreased with the increase of 22.5% Picoxystrobin SC concentration. [Conclusion] The results provide theoretical basis for popularization and application of 22.5% Picoxystrobin SC.

Key words 22.5% Picoxystrobin SC； Seed kernel dressing； Root rot； Stalk rot； Southern blight； Control effect

泰州市旱地作物研究所地江蘇省苏中花生、大豆等油料作物及杂粮主产区，土质沙壤，是长江下游较典型的农业生态区。2013年泰州地区花生种植面积已超1.33万hm2。近10年来，该所不仅注重花生新品种的选育，先后育成泰花系列花生1～8号，并且加大了栽培技术的研究推广[1-6]。近年来，由于气候的异常变化、农户茬口安排的不合理，花生重茬田越来越多，加重了花生病害的发生。针对花生苗期根腐病、茎腐病和中期白绢病的发生较严重，常规药剂防治效果较差的现状，该所引进杜邦阿砣（22.5%啶氧菌酯悬浮剂）新型药剂对特色花生“泰花4号”种仁进行拌种[7]，研究了其对花生根腐病、茎腐病和中期白绢病的防治效果，旨在为该地区花生病害防治提供借鉴。

1 材料与方法

1.1 材料

1.1.1

供试作物。……