重庆北碚地区发生桑树轮纹病的调查与防治方法
Investigation and Prevention of Mulberry Ring Sheath Disease in Beibei District of Chongqing
罗太明 1杨碧文 1宋志光 1徐洪 1陈永皇 1宋长贵1
作者信息
- 1. 重庆市蚕业科学技术研究院,重庆 400799
- 折叠
摘要
桑轮纹病属于真菌病害,近年来重庆市多个蚕区的桑园均有发生为害.调查桑树轮纹病在重庆北碚地区的发生时间一般在 9～10 月份,桑叶受病原菌侵染后产生大小不等呈淡黄色和红褐色鲜明的同心轮纹,最终导致叶片龟裂、穿孔;5 个主栽桑品种的抗病性有差异,其中北桑 1 号发病率最高,新一之涑页的发病较低;温暖湿润的气候环境及低干密植桑园较易发生病害.连续多年的田间试验表明,保持桑园的通风透光性能、合理施肥增强树势、冬季做好清园工作能在一定程度上减轻病害发生;桑树夏伐疏芽结束后,用 70%甲基硫菌灵可湿性粉剂 1 000倍稀释液喷施新梢,每 10d施药 1 次,连续施药 3 次,基本上可以控制该病害的发生.
Abstract
The fungal disease mulberry ring sheath has been affecting mulberry gardens in many silk-worm breeding areas in Chongqing in recent years.According to the investigation,mulberry ring spot dis-ease in Chongqing typically occurs from August to October.Infected mulberry leaves develop concentric rings of varying sizes in bright yellow and reddish brown,eventually leading to leaf cracking and perfora-tion.The resistance levels varied among the five main mulberry varieties,with Beisang No.1 exhibiting the highest incidence and Xinyizhilai showing the lowest susceptibility.The disease is more likely to occur in warm and humid climate and low dry density mulberry plantation.The field experiments over many years have shown that maintaining ventilation and light transmission in the mulberry orchard,fertilizing appropriately to enhance tree vigor,and clearing the orchard well in winter can somewhat reduce disease occurrence.After mulberry summer thinning,spraying the new shoots with a 70%methyl thiourea wetta-ble powder diluted solution(1:1000)every 10 days for three consecutive times effectively prevents disease occurrence.
关键词
桑树/桑轮纹病/发生规律/发病症状/防治方法Key words
Morus L./Ring sheath disease/Occurrence patterns/Disease symptom/Control strategies引用本文复制引用
基金项目
重庆市科研机构绩效激励引导专项(scky2023jxjl0301)
出版年
2024
NETL
NSTL
万方数据