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20%辣根素水乳剂防治番茄真菌病害的效果

2018-08-30杨龙李柏润杨爱宾闫晓静冯学良宋广玉唐永栋

天津农业科学 2018年6期

杨龙 李柏润 杨爱宾 闫晓静 冯学良 宋广玉 唐永栋

摘 要:为研究生物消毒剂辣根素对番茄真菌病害的防治效果,试验开展了20%辣根素水乳剂45, 75, 105 L·hm-2与农户常用于前期预防和土壤处理的50%多菌灵可湿性粉剂22 500 g+3%辛硫磷颗粒剂90 000 g及70%甲基硫菌灵可湿性粉剂7 500 g+3%辛硫磷颗粒剂90 000 g的对比试验,通过滴灌施药的方法对设施番茄的定植前土壤进行消毒处理,调查各处理对番茄根腐病和茎基腐病的防效。结果表明,各剂量20%辣根素对番茄根腐病和茎基腐病的防治效果均显著优于多菌灵+辛硫磷和甲基硫菌灵+辛硫磷的常规配方,其中以20%辣根素水乳剂105 L·hm-2剂量效果最佳,利用辣根素防治番茄真菌病害的安全性较高,可在天津市设施园区番茄真菌病害防治中应用推广。

关键词:辣根素;生物防治;番茄;真菌病害

中图分类号:S641.2 文献标识码:A DOI 编码:10.3969/j.issn.1006-6500.2018.06.016

Study on Effect Trial of Fungi Disease by 20% Isothiocyanate Emulsion for Tomato

YANG Long1, LI Bairun1, YANG Aibin1, YAN Xiaojing2, FENG Xueliang3, SONG Guangyu3, TANG Yongdong4

(1.Plant Protection and Quarantine Station of Tianjin,Tianjin 300061, China;2.Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China;3.Plant Protection and Quarantine Station of Jinnan,Tianjin 300350, China;4.Tianjin Juhe Century Biotechnology Company, Limited, Tianjin 300353, China)

Abstract:The experiment was conducted to study the effect of isothiocyanate on tomato to prevent fungal diseases. Comparison experiment of the 20% isothiocyanate EW with the dosage of 45, 75, 105 L·hm-2 and traditional chemical control, including 50% Carbendazim WP 22 500 g +3% Phoxim GR 90 000 g and 70% Thiophanate-methyl WP 7 500 g+3% Phoxim GR 90 000 g, were studied for the fungal control effect on tomato using drip irrigation system in greenhouse. The results showed that the biocontrol effect of isothiocyanate on tomato fungal diseases was better than the traditional chemical control, and the effect was best when the dosage of 20% isothiocyanate EW was 105 L·hm-2. In addition, the biocontrol effect of isothiocyanate was safer than the chemical control, so isothiocyanate could be applied to tomato cultivation to prevent the fungal diseases.

Key words: isothiocyanate; biological control; tomato; fungal disease

随着设施作物复种指数提高和連茬种植,土壤中病原菌、虫卵持续积累,病虫害种类多、数量大、危害蔬果全生育期,危害逐年加重,如番茄、草莓等主栽设施蔬果受根结线虫病、枯萎病等多种土传病虫害影响[1],逐渐成为制约设施农业稳产、高产、可持续发展的瓶颈,而化学药剂不合理使用成为影响农产品质量安全和环境安全的关键环节。土壤消毒处理是预防和控制土传病虫害最简便、经济、有效的技术措施之一[2],生物农药辣根素是从辣根等十字花科植物中提取出的一类主要成分为异硫氰酸酯类环境友好型化合物,是国际上替代传统土壤消毒产品溴甲烷的重要产品[3]。……

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