贵州农业科学
貴州農業科學
귀주농업과학
GUIZHOU AGRICULTURAL SCIENCES
2014年
10期
130-132
,共3页
杀菌剂%茶树%茶轮斑病%毒力%防治效果
殺菌劑%茶樹%茶輪斑病%毒力%防治效果
살균제%다수%다륜반병%독력%방치효과
Fungicides%tea%Pestalotiopsis theae%toxicity%control effect
为了筛选防治茶轮斑病的化学药剂，采用菌落直径法测定了茶轮斑病菌对7种杀菌剂的敏感性，并对茶轮斑病菌高度敏感药剂进行田间药效试验。结果表明：轮斑病菌对阿米西达、世高、丙环唑、百菌清和苯菌灵高度敏感，其抑制中浓度（EC50）在0．0947～3．0630μg/mL；甲基托布津和多菌灵的 EC50分别为6．9649μg/mL 和7．0405μg/mL，表现为中度敏感（EC50＝5～20μg/mL）；田间药效以25％阿米西达SC 150 g/hm2的防效最高，达86．96％；其次为10％世高 WG 125 g/hm2、25％丙环唑 EC 112．5 g/hm2和75％百菌清WP 125 g/hm2，防效分别为81．16％、74．79％和72．38％；50％苯菌灵WP 325 g/hm2防效最低，为62．21％。
為瞭篩選防治茶輪斑病的化學藥劑，採用菌落直徑法測定瞭茶輪斑病菌對7種殺菌劑的敏感性，併對茶輪斑病菌高度敏感藥劑進行田間藥效試驗。結果錶明：輪斑病菌對阿米西達、世高、丙環唑、百菌清和苯菌靈高度敏感，其抑製中濃度（EC50）在0．0947～3．0630μg/mL；甲基託佈津和多菌靈的 EC50分彆為6．9649μg/mL 和7．0405μg/mL，錶現為中度敏感（EC50＝5～20μg/mL）；田間藥效以25％阿米西達SC 150 g/hm2的防效最高，達86．96％；其次為10％世高 WG 125 g/hm2、25％丙環唑 EC 112．5 g/hm2和75％百菌清WP 125 g/hm2，防效分彆為81．16％、74．79％和72．38％；50％苯菌靈WP 325 g/hm2防效最低，為62．21％。
위료사선방치다륜반병적화학약제，채용균락직경법측정료다륜반병균대7충살균제적민감성，병대다륜반병균고도민감약제진행전간약효시험。결과표명：륜반병균대아미서체、세고、병배서、백균청화분균령고도민감，기억제중농도（EC50）재0．0947～3．0630μg/mL；갑기탁포진화다균령적 EC50분별위6．9649μg/mL 화7．0405μg/mL，표현위중도민감（EC50＝5～20μg/mL）；전간약효이25％아미서체SC 150 g/hm2적방효최고，체86．96％；기차위10％세고 WG 125 g/hm2、25％병배서 EC 112．5 g/hm2화75％백균청WP 125 g/hm2，방효분별위81．16％、74．79％화72．38％；50％분균령WP 325 g/hm2방효최저，위62．21％。
The sensitivity of P .theae against seven fungicides was determined by colony diameter method and then the selected fungicides with high sensitivity against P .theae were tested in field to study the control efficiency for screening the optimum chemical agents against Pestalotiopsis theae.The results showed that EC50 of Azoxystrobin,Score,Propiconazole,Chlorothalonil and Benomyl with high sensitivity against P .theae is 0.0947~3.0630μg/mL but EC50 of Thiophanate methyl and Carbendazim with medium sensitivity against P .theae is 6.964 9 μg/mL and 7.040 5 μg/mL respectively.The field control efficiency of 25% Azoxystrobin SC (150 g/hm2 ),10% Score WC (125 g/ hm2 ),25%Propiconazole EC (112.5 g/hm2 ),75% Chlorothalonil WP and 50% Benomyl WP (325 g/ hm2 )is 86.96%,81.16%,74.79%,72. 38% and 62.21% separately.
