摘要： 对北京地区早熟禾褐斑病分离到的立枯丝核菌（Rhizoctonia solaniKuhn）进行了7个温度（12，16，20，24，28，32，36℃）、两种光照条件（全黑暗和12 h光暗交替）下的菌丝生长速率测定、菌核产生量比较，温度对发病的影响，10种杀菌剂的抑菌试验和几种杀菌剂的田间药效试验。菌丝生长的适宜温度范围为24~32℃；12 h光/暗交替条件下，菌丝生长速率加快；32℃下菌核产生量显著多于其他温度；20~30℃下早熟禾发病严重。多菌灵、扑海因、坪安1号和多氧霉素等杀菌剂的抑菌效果好。田间药效试验表明，扑海因、井岗霉素、坪安1号和多菌灵对褐斑病有良好的防治作用。
关键词:
立枯丝核菌,
褐斑病,
早熟禾
Abstract: The experiments were conducted in the growth responses of Rhizoctonia solani isolated from Kentucky bluegrass in Beijing region at seven temperatures(12,16,20,24,28,32,36℃),two illumination conditions(whole dark and 12 h light/dark cycles),and the inhibition activity of 10 fungicides on pathogens in laboratory.The field trails of 4 fungicides control on Kentucky bluegrass brown patch were carried out.Optimal temperature for mycelial growth was 24,28 and 32℃.Mycelial growth was quicker under 12 h light/dark cycles than under whole dark.Conidia was at mass production 32℃.The disease indices were the highest at 20,25,30℃.Rhizoctonia solani was sensitive to carbendazim,iprodione,pingan-1 and polyoxin in laboratory test.In field trials,iprodione,jinggangmycin,pingan-1 and carbendazim significantly suppressed the disease.
Key words:
Rhizoctonia solani,
brown patch,
Kentucky bluegrass (Poa pratensis)
中图分类号:
贾春虹, 江国铿. 北京地区早熟禾褐斑病菌生物学特性及防治研究[J]. 华北农学报, 2006, 21(6): 111-114. doi: 10.3321/j.issn:1000-7091.2006.06.027.
JIA Chun-hong, JIANG Guo-keng. Studies on the Biological Characteristics of Rhizoctonia solani on Poa pratensis and the Control of Brown Patch[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2006, 21(6): 111-114. doi: 10.3321/j.issn:1000-7091.2006.06.027.