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水稻第一次病虫总体防治意见
发布时间:2018-07-27

一、当前主要病虫发生情况与趋势

1、纵卷叶虫

四(2)代发生较轻。五(3)代大田赶蛾723日出现发蛾高峰,目前尚处于发蛾高峰中,预计蛾峰可持续至8月初,亩蛾量平均598-897头,高的地区有4500头。当前田间发生不平衡性很大,据725-26日全市普查,平均百穴虫量16.80-133)头,以1龄为主;平均百穴卵量208.80-1333)粒,以1-3级为主。预计田间虫卵量还将进一步上升,81日开始进入12龄幼虫高峰期,如不进行防治,部分田块将会出现严重白叶危害。五(3)代纵卷叶虫总体呈中等偏重发生趋势。

2、纹枯病

725-26日全市普查,当前田间处于零星发生状态,平均病穴率0.630-12%,平均病株率0.060-1.17%。另据苗情调查,今年苗数足、群体大,够苗期和生育进程略早于往年,苗情总体属于近几年同期较好,将有利于发病。预计今年纹枯病仍有偏重以上的发生趋势。随着田间搁田复水,病情将进入急增期。

3、稻飞虱

白背飞虱:四(1)代灯下625日始见。截止724日,单灯累计诱虫71头。710日左右开始出现五(2)代孵化,据725-26日全市大田普查,平均百穴虫量76.712-230)头,发生偏轻。

灰飞虱:据725-26日全市普查,平均百穴虫量181.860-396)头,以若虫为主,各龄期均有,数量低于去年同期,属近几年同期偏高年份。

此外,褐飞虱715日田间始见,据725-26日全市普查,平均百穴虫量4.20-24)头。

二、防治意见

我市目前处于盛夏高温期,雷阵雨天气多发,温度和湿度有利于两迁害虫、纹枯病发生与危害。为此,各地务必高度重视,迅速宣传发动,打好水稻病虫总体防治第一仗,坚持治前期、保后期的防控策略,压低基数控危害,为夺取水稻丰收奠定基础。

1、防治日期: 81-3                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

2、防治对象:主攻五(3)代纵卷叶虫、纹枯病,兼治稻飞虱等。

3、用药配方:亩用20%甲维·茚虫威悬浮剂(稼农神)12克(1包)+20%噻呋·己唑醇悬浮剂(纹歼)40毫升(1瓶)+50%吡蚜·异丙威可湿性粉剂(排头兵)402包)。

4、用药方法:每亩兑水30公斤小背包机喷细雾或兑水20公斤弥雾机弥雾。

三、注意事项

1、用药时田间必须建立水层,保水2-3天。同时加强水浆管理,防止用药后田水直接排入鱼塘,以防发生中毒事故。

2、高温季节做好安全防护,采取早晚用药,避开中午强光照时段用药,防止发生药害和安全事故。

3专业化病虫害防治服务组织和从事农产品生产的农民专业合作社等应当建立农药使用记录,如实记录农药使用相关信息。

4、注意农药包装废弃物的回收,保护农业生态环境。

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