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首页> 外文期刊>Plant Pathology Journal >Adjuvant and Refined Corn Oil Formulation Effects on Conidial Germination, Appressorial Formation and Virulence of the Bioherbicide, Colletotrichum truncatum
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Adjuvant and Refined Corn Oil Formulation Effects on Conidial Germination, Appressorial Formation and Virulence of the Bioherbicide, Colletotrichum truncatum

机译：佐剂和精制玉米油配方对生物除草剂截肢炭疽菌分生孢子萌发，附生器官形成和毒力的影响

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摘要

Several surfactants, plant extracts and fatty acids were tested for stimulation of conidial germination, appressorial formation and virulence of Colletotrichum truncation, a bioherbicide of the weed, hemp sesbania (Sesbania exaltata). The commercial surfactants (Tweens~R 40, 60, 80, 85 and Myvatex~R 60) at concentrations of 0.25 to 1.0% (v/v), stimulated germination, but these effects were not exclusively related to their hydrophylic-lipophylic balance values. The stimulatory surfactants were also tested for germination and virulence of C. truncatum when formulated with the conidia and applied to hemp sesbania seedlings. Conidia formulated in either water, a surfactant or, an emulsion of refined corn oil were ineffective on the plant in the absenceof dew or when dew was delayed. However, formulations of conidia combined with surfactant in emulsified refined corn oil did exhibit bioherbicidal activity when adequate dew or free-moisture was unavailable. This is important since previous reports indicated that refined corn oil did not enhance bioherbicidal activity, whereas unrefined corn oil promoted pathogen germination and efficacy of C. truncatum. The fatty acids tested had little or no effect on conidial germination but, aqueous extracts of several plant species including pathogen hosts and non-hosts, stimulated germination. Appressorial formation influenced by the surfactants did not necessarily reflect the disease rating on hemp sesbania seedlings. Overall, results show that formulations containing an emulsion of conidia, a surfactant and refined corn oil have potential for enhancement of the efficacy of C. truncatum.
机译：对几种表面活性剂，植物提取物和脂肪酸进行了测试，以刺激分生孢子萌发，附生器官的形成和强毒性炭疽菌截短病-一种芝麻麻（Sesbania exaltata）的截短性。浓度为0.25至1.0％（v / v）的市售表面活性剂（Tweens〜R 40、60、80、85和Myvatex〜R 60）刺激了发芽，但这些作用并不仅仅与它们的亲水-脂质平衡值相关。当与分生孢子一起配制并施用于大麻芝麻种子后，还测试了刺激性表面活性剂对沙眼衣原体的萌发和毒力。在没有露水或延迟露水的情况下，用水，表面活性剂或精制玉米油乳液配制的分生孢子对植物无效。然而，当没有足够的露水或自由水分时，在乳化精制玉米油中结合分生孢子的表面活性剂配方确实表现出生物除草活性。这很重要，因为以前的报告表明精制玉米油不会增强生物除草活性，而未精制玉米油则可以促进病原体的萌发和矮牵牛的功效。测试的脂肪酸对分生孢子萌发影响很小或没有影响，但是包括病原体宿主和非宿主在内的几种植物的水提物刺激了萌发。表面活性剂影响的附属物形成未必反映大麻芝麻种子的病害等级。总体而言，结果表明，含有分生孢子乳剂，表面活性剂和精制玉米油的制剂具有增强圆角衣藻功效的潜力。

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