7种杀菌剂对杨树烂皮病、溃疡病病菌的室内毒力测定  

Indoor toxicity determination of 7 fungicides against Cytospora chrysosperma and Dothiorella gregaria in poplar

作　　者：刘宝生[1] 谷希树[1] 刘孝林 张少青 康长华[4] 张素芬[4] 

机构地区：[1]天津市植物保护研究所,天津300381 [2]天津市静海县森林病虫害防治检疫站,天津静海301600 [3]天津市蓟县森林病虫害防治检疫站,天津301900 [4]天津市森林病虫害防治检疫站,天津300074

出　　处：《中国森林病虫》2013年第5期1-3,共3页Forest Pest and Disease

基　　金：天津市科技支撑项目"杨树主要病害生态控制技术研究与集成示范"(12ZCZDNC00500);"林木蛀干害虫信息诱引技术与非化学防控示范"(11ZCGYNC00100)

摘　　要：室内测定了7种杀菌剂对杨树烂皮病病原菌金黄壳囊孢菌Cytospora chrysosperma(Pers.)Fr.、溃疡病病原菌Dothiorella gregaria Sacc.的毒力。72 h含药平板对抑制金黄壳囊孢菌的菌丝生长毒力最强的有10%苯醚甲环唑水分散剂、250 g/L嘧菌酯悬浮剂,EC50值依次为0.000 6,0.020 2μg/mL;其次为70%甲基托布津可湿性粉剂,EC50为0.195 8μg/mL;最弱的是树乐粉剂,EC50为319.658 0μg/mL。48 h对杨树溃疡病病原菌的毒力最强的有250 g/L嘧菌酯悬浮剂、10%苯醚甲环唑水分散剂,EC50依次为0.072 2,0.090 4μg/mL;其次为70%甲基托布津和50%多菌灵可湿性粉剂,EC50依次为2.5603,19.0454μg/mL;树乐最弱,EC50为366.415 7μg/mL。同一药剂对杨树烂皮病菌的毒力强于溃疡病菌。Virulence of 7 fungicides to Cytospora chrysosperma and Dothiorella gregaria in poplar was determined to provide reference for the control of 2 poplar diseases in field. The results of mycelial growth inhibition determination on C. chrysosperma with medicated plate culture for 72 h in lab showed that the most virulent fungicides were difenoconazole 10% with EC50 of 0. 000 6 μg/mL and azoxys- trobin 250 g/L with ECso of 0. 020 2 μg/mL, thiophanate-methy WP 70% with ECs0 of 0. 195 8 μg/mL was the next, the virulence of SHUle with ECso of 319. 6580 μg/mL was the wea- kesto The results of toxicity determination on D. gregaria for 48 h showed that the most virulent fungi- cides were azoxystrobin 250μg/L with ECs0 of 0. 072 2 μg/mL and difenoconazole 10% with ECs0 of 0. 090 4μg/mL,thiophanate-methy WP 70% with ECso of 2. 560 3μg/mL and carbendazim WP 50% with ECso of 19. 045 4 μg/mL were the next,the virulence of SHUle with ECs0 of 366. 415 7 μg/mL was the weakest o The virulence of the same fungicide on C. chrysosperma was stronger than that on D. gregaria.

关 键 词：杀菌剂 金黄壳囊孢菌 杨树溃疡病菌 毒力 

分 类 号：S763.15[农业科学—森林保护学]