广西芒果树叶片苔藓发生情况调查及药剂筛选试验

对广西芒果树叶片苔藓的发生情况及防治药剂进行了初步研究?调查了广西芒果主产区的南宁市(武鸣区?兴宁区)和百色市(田东县?田阳县?田林县和右江区)?在南宁市开展4种药剂的18种不同浓度或者配比组合的药剂筛选试验?结果表明, 南宁市芒果树叶片平均发病率达到88.5%, 右江区发病率为81.7%, 其后依次为田东县?田林县和田阳县, 发病率分别为56.1%?54.8%和34.2%?通过不同药剂及其不同配比药效试验, 80%乙蒜素乳油的防效极显著优于46%氢氧化铜水分散粒剂?32%唑酮·乙蒜素乳油和70%甲基硫菌灵可湿性粉剂?80%乙蒜素乳油500倍液?1 000倍液和1 500倍液的防效分别为93.37%?85.82%和51.85%?综上, 芒果树叶片苔藓已在广西全区普遍发生, 南宁市和右江区受害严重, 推荐使用80%乙蒜素乳油1 000倍液防治?

Occurrence investigation of the mango leaves moss in Guangxi and its pesticide trial

The occurrence of moss on mango leaves in Guangxi was investigated and the preliminary study on the pesticide trial was conducted. Investigations were carried out in Nanning city (including Wuming and Xingning districts) and Baise city(including Youjiang district and Tiandong, Tianyang, and Tianlin counties)of Guangxi province. The screening tests of 18 different pesticides or combinations of 4 agents were carried out in Nanning. The results showed that the average incidence of mango tree leaves in Nanning reached 88.5%, followed by 81.7% in Youjiang district, 56.1% in Tiandong county, 54.8% in Tianlin county and 34.2% in Tianyang county. According to the efficacy test of different agents and different ratios, the prevention effect of ethylicin 80% EC was significantly better than that of copper hydroxide 46% WG, triadimefon·ethylicin 32% EC and thiophanate-methyl 70% WP. The prevention effect of ethylicin 80% EC in 500 fold solution, 1 000 fold solution and 1 500 fold solution was 93.37%, 85.82% and 51.85%, respectively. To sum up, bryophytes of mango leaves have been widely distributed in Guangxi and seriously damaged in Nanning city and Youjiang district. It is recommended to use ethylicin 80% EC 1 000 fold solution for control.