Rice Sheath Rot: Targeted Approach for Studying the Efficacy of Fungicides and Biocontrol Agents Under Field Conditions of Northern India

IF 1.1 4区 农林科学 Q3 PLANT SCIENCES
Amritpal Mehta, S. K. Singh, Owais Ali Wani, Shafat Ahmad Ahanger, Umer Basu, Amrish Vaid, Sonali Sharma, Ashwani Kumar Basandrai
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Abstract

Sheath rot, caused by Sarocladium oryzae, has emerged as a potential threat in the rice-growing areas of northern India where commercially available rice varieties are susceptible to this disease. Various fungicides and Trichoderma spp. were evaluated in vitro and in vivo against S. oryzae to develop effective management tools to reduce yield losses from the disease. In a 2-year field trial, different combinations of seed treatments and two foliar sprays of fungicide and/or T. harzianum Th-II were evaluated in conditions of artificial inoculation with the pathogen. Based on combined data from the 2 years, the minimum percent disease index (PDI) (11.2%) and the highest mean grain yield (3.63 t/ha) with maximum net profit of INR ₹43,350/ha were recorded for seed treatment with azoxystrobin 11% + tebuconazole 13.8% SC followed by two foliar sprays of azoxystrobin + tebuconazole. The next best treatment consisted of seed treatment with azoxystrobin + tebuconazole followed by two foliar sprays of tebuconazole 25.9% EC; seed treatment with azoxystrobin + tebuconazole followed by two foliar sprays of tebuconazole 50% + trifloxystrobin 25% WG; and seed treatment with Th-II followed by two foliar sprays of azoxystrobin + tebuconazole, which resulted in PDI values of 12.7%, 14.1% and 14.4%; grain yields of 3.56, 3.47 and 3.44 t/ha; and net profits per ha of INR ₹41,087, ₹36,341 and ₹35,769, respectively.

水稻纹枯病:印度北部田间条件下杀菌剂和生物防治剂效果的针对性研究
由稻瘟弧菌引起的鞘腐病已经成为印度北部水稻种植区的一种潜在威胁,在那里,市售的水稻品种易受这种疾病的影响。在体外和体内评价了各种杀菌剂和木霉对米曲霉的抗性,以开发有效的管理工具来减少该病害造成的产量损失。在为期2年的田间试验中,在人工接种病原菌的条件下,对不同组合的种子处理和2次叶面喷施杀菌剂和(或)哈氏梭菌Th-II进行了评价。根据2年的综合数据,采用11%氮唑虫胺+ 13.8%戊唑唑SC处理后,叶面喷施两次氮唑虫胺+戊唑唑,可获得最小病指数(PDI)(11.2%)和最高平均产量(3.63 t/ha),最高净利润为43350卢比/ha。次佳处理为氮唑虫胺+戊唑唑种子处理,其次为戊唑唑25.9% EC叶面喷施;先用氮嘧菌酯+戊唑唑处理种子,再用戊唑唑50% +三氯嘧菌酯25% WG叶面喷施两次;Th-II种子处理后叶面喷施氮氧虫胺+戊唑唑2次,PDI值分别为12.7%、14.1%和14.4%;粮食产量分别为3.56、3.47和3.44吨/公顷;每公顷净利润分别为41,087卢比、36,341卢比和35,769卢比。
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来源期刊
Journal of Phytopathology
Journal of Phytopathology 生物-植物科学
CiteScore
2.90
自引率
0.00%
发文量
88
审稿时长
4-8 weeks
期刊介绍: Journal of Phytopathology publishes original and review articles on all scientific aspects of applied phytopathology in agricultural and horticultural crops. Preference is given to contributions improving our understanding of the biotic and abiotic determinants of plant diseases, including epidemics and damage potential, as a basis for innovative disease management, modelling and forecasting. This includes practical aspects and the development of methods for disease diagnosis as well as infection bioassays. Studies at the population, organism, physiological, biochemical and molecular genetic level are welcome. The journal scope comprises the pathology and epidemiology of plant diseases caused by microbial pathogens, viruses and nematodes. Accepted papers should advance our conceptual knowledge of plant diseases, rather than presenting descriptive or screening data unrelated to phytopathological mechanisms or functions. Results from unrepeated experimental conditions or data with no or inappropriate statistical processing will not be considered. Authors are encouraged to look at past issues to ensure adherence to the standards of the journal.
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