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首页> 外文期刊>The Australian Cottongrower >Systemic induced resistance helps natural cotton plant defences.
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Systemic induced resistance helps natural cotton plant defences.

机译：全身诱导的抗性有助于天然棉花植物的防御。

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摘要

Studies carried out under greenhouse and field conditions examining systemic induced resistance (SIR) in cotton against some cotton diseases are reported briefly. During the 1997-98 cotton season, field trials were conducted at Sydney, New South Wales, Australia, studying Alternaria leaf spot and bacterial blight on Pima cotton and Verticillium and Fusarium wilts on Upland cotton. Two treatments were tested, benzothiadiazole (BTH) and silicic acid. Severe outbreaks of Alternaria leaf blight and bacterial blight occurred during the 1997-98 season, with the application of BTH and silicic acid made in January. Assessment of the disease was made in early March. Treatment with BTH or silicic acid reduced the percentage leaf area covered with Alternarialesions (2-15 fold), reduced the leaf area blighted (2-22 fold) and reduced the defoliation. In a field experiment at the Australian Cotton Research Institute, using Siokra 1-4, BTH and silicic acid were applied to the entire foliage to test for resistance to Verticillium wilt (V. dahliae). The first treatment was applied before the appearance of the foliar symptoms and a second application was applied in mid-January. Disease severity was low in treated and untreated plants, but the application of BTHand silicic acid significantly decreased disease severity in Verticillium-infested soils. A study on Fusarium wilt was carried out using Sicot 189. The first BTH treatment was applied in late November when plants were severely infected, with a second application in mid-January. Assessment of disease was carried out in early March. Plants that were treated with BTH grew taller and had reduced vascular browning (25% compared with 35%).
机译：简要报道了在温室和田间条件下进行的研究，研究了棉花对某些棉花疾病的系统诱导抗性（SIR）。在1997-98年的棉花季节期间，在澳大利亚新南威尔士州的悉尼进行了田间试验，研究了皮马棉和陆地棉上的黄萎病和镰刀菌枯萎病的交链孢菌叶斑病和细菌性疫病。测试了两种处理，苯并噻二唑（BTH）和硅酸。在1997-98季节期间发生了严重的链格孢属叶枯病和细菌性枯萎病暴发，1月份施用了BTH和硅酸。该病在三月初进行了评估。用BTH或硅酸处理可以减少被链霉菌病覆盖的叶子面积百分比（2-15倍），减少枯萎的叶子面积（2-22倍）并减少落叶。在澳大利亚棉花研究所使用Siokra 1-4进行的田间试验中，将BTH和硅酸施用于整个叶子，以测试其对黄萎病（V. dahliae）的抗性。在出现叶状症状之前进行第一次治疗，在1月中旬进行第二次治疗。在处理过的植物和未处理过的植物中，病害严重程度较低，但是BTHand硅酸的施用显着降低了黄萎病菌侵染的土壤中的病害严重程度。使用Sicot 189进行了镰刀菌枯萎病的研究。第一次BTH处理于11月下旬受到植物严重感染时进行，第二次于1月中旬进行。疾病评估于3月初进行。用BTH处理的植物长得更高，血管褐变减少（25％比35％）。

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