CN106718455A - 一种农药减量使用的再生稻主要病虫害综合防控方法 - Google Patents

一种农药减量使用的再生稻主要病虫害综合防控方法 Download PDF

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CN106718455A
CN106718455A CN201710019055.0A CN201710019055A CN106718455A CN 106718455 A CN106718455 A CN 106718455A CN 201710019055 A CN201710019055 A CN 201710019055A CN 106718455 A CN106718455 A CN 106718455A
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rice
milliliters
field
grams
suspending agent
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CN106718455B (zh
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邱良妙
占志雄
刘其全
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Institute of Plant Protection of FAAS
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Abstract

本发明提供一种农药减量使用的再生稻主要病虫害综合防控方法,属水稻病虫害防治技术领域。本发明针对再生稻病虫害发生特点和规律,对再生稻主要病虫害实施监测预警、农业防治、物理防治、生物防治和化学防治,构建农药减量使用的再生稻主要病虫害综合防控技术体系。本发明充分发挥了各技术措施对再生稻病虫害协同控制作用,将再生稻主要病虫害控制在经济阈值以内,有效减少再生稻病虫害防治农药的使用量,达到水稻无公害生产、农田生态***可持续发展及环境保护的目的,实现显著的经济、社会和生态效益。

Description

一种农药减量使用的再生稻主要病虫害综合防控方法
技术领域
本发明涉及一种农药减量使用的再生稻主要病虫害综合防控方法,属农业病虫害防治技术领域,尤其适用于再生稻主要病虫害的监测预警、综合防治、无公害稻米生产及农业生态保护等农业科研领域。
背景技术
粮食安全是国家和社会稳定的基础,我国粮食生产形势不容乐观,水稻作为最主要的粮食作物,水稻种植面积占全国粮食种植面积的1/4,稻谷产量占粮食总产量的50%以上,因此,水稻在我国粮食生产中占有极其重要地位,可以说水稻粮食生产对我国粮食安生具有基础性作用和地位。目前,我国粮食安全面临的形势十分严峻,从国内来看,我国粮食自给自足率仅90%,2012年,我国三大谷物进口达1000万吨,成为粮食净进口国,随着城镇化进程的不断加快、人口持续增长、耕地和淡水资源不断减少等诸多客观因素也都在频频挑战国家粮食生产的安全。在水稻粮食生产方面,由于水稻种植生长周期较长,劳动力投入成本大,加上水稻病虫害发生猖獗,病虫害防治成本也逐年上升,造成农民种粮积极性不断降低。因此,近年来,国家十分重视水稻粮食生产的安全,投入培育了一批高产优质水稻新品种,保障了粮食生产的高效优质,为我国水稻粮食生产的安全奠定了重要的基础。
除了推广应用高产优质水稻新品种外,如何充分利用自然资源环境条件,生产更多水稻粮食也是保障我国水稻粮食安全的重要技术措施,近年来,推广种植再生稻取得了良好的成效。再生稻简单地说就是种一茬收获两次,即头季水稻成熟收割后,利用稻桩腋芽萌发后重新发苗、抽穗,并再收一季稻谷的水稻种类。再生稻是水稻的一类品种,在中国有着悠久的种植历史,可以追溯到1700年前。其特点是在一季稻成熟之后,水稻茎杆上有大量的腋芽,第一季稻谷成熟后大约只割取水稻植株上面2/3的部位,收取稻穗,留下下面的1/3植株和根系,施肥和培育,让稻桩的腋芽再次萌发、生长、抽穗、成熟,并可以再收割一次,通常第二季稻谷谷粒比第一季小一些,但是第二季的稻穗数会比一季的多,两季总产量通常会比一季稻的产量增加50%以上,因此,推广应用再生稻技术也是保障水稻粮食生产安全的重要技术手段。
适合种植再生稻的地区主要为阳光和热度不够种植两季稻,但是种植一季稻又有多余阳光和热度的地区。统计表明,我国如今种植水稻的面积约为2亿亩,其中有5000万亩的地区适合推广再生稻。近年来,我国许多地区如福建、四川、湖北、江西、重庆等地区正在大面积地推广应用再生稻技术,按照报道的示范数据来推算,推广再生稻技术,我国每年可增产稻谷产量2000万吨,可以说,发展再生稻是确保中国未来粮食安全的一个重要的有效举措。
由于水稻种植收益率相对较低,农民种粮积极性普遍较低,再生稻栽培技术在一定程度上提高了种粮的收益率;但是,由于再生稻的栽培技术特点不同于传统的双季稻与单季稻,因此,再生稻病虫害发生特点和为害规律也不同于传统的双季稻与单季稻,病虫害的猖獗为害对再生稻产量和品质构成了严重威胁。如何***控制再生稻病虫害的猖獗为害是确保再生稻生产的关键,目前这方面的研究应用相对溃乏,导致粮农对再生稻病虫害的猖獗为害无从适从,单一大量依靠化学农药进行防治也疲于应付,过度大量使用化学农药造成“3R”(害虫抗性、害虫再增猖獗和环境污染)等一系列问题,造成稻田生态***处于不断受到破坏的恶性循环之中,害虫进一步猖獗发生为害,反过来又只能依靠大量使用化学农药来控制病虫害以保证粮食产量。因此,广大粮农十分迫切需求适合于再生稻病虫害防控的技术和方法来有效降低生产成本,提高经济效益。目前,国家也十分重视农业病虫害防治中过度使用化学农药及环境污染等问题,农业部提出至2020年农药使用零增长,这势必要求建立农业病虫害***协调解决方案,水稻病虫害防治中农药使用量极大,尤其是再生稻生产中,由于病虫害发生为害规律发生了显著变化,对再生稻病虫害实施综合***调控是实现减少稻田农药使用量的关键技术措施,目前,这方面的技术方法几乎是空白。
发明内容
本发明的目的在于提供一种农药减量使用的再生稻主要病虫害综合防控方法,该方法采取的技术方法包括再生稻主要病虫害的田间监测预警、农业防治、物理防治、生物防治和化学防治5种技术措施进行科学地优化集成和组装,构建了农药减量使用的再生稻主要病虫害综合防控技术体系,并应用于再生稻的生产实际之中。
为实现上述目的,本发明采用如下技术方案:
1、 头季稻秧苗期培育壮秧预防病虫害发生
(1)农业防治措施:①选择再生能力强、对水稻主要病虫害具有较强抗性的水稻品种作为再生稻栽培品种;②严格按照晒种、定播种期、浸种、催芽、播种的流程培育壮秧;
(2)化防防治措施:用种衣剂浸种或催芽后播种前选用31.9%吡虫啉•戊唑醇悬浮种衣剂(有效成分111.75-335.25克/100千克种子)、7%吡虫啉•咪鲜胺悬浮种衣剂(有效成分58.35-87.5克/100千克种子)、35%噻虫嗪•咪鲜胺悬浮种衣剂(有效成分70-87.5克/100千克种子)水稻专用种衣剂包衣拌种处理,可有效控制秧苗期稻飞虱、稻蓟马,还可有效控制秧苗期恶苗病及预防水稻黑条矮缩病的发生;
2、头季稻秧苗移栽期至分蘖期
(1)农业防治措施:①利用螟蛾类害虫的化蛹期抗逆性弱的特性,在春季螟虫化蛹期结合春耕农事操作,铲除销毁田边杂草,稻桩深埋,每亩撒施生石灰75公斤左右,春耕灌水7-10天,以灭杀越冬虫源和病原菌;②稻田四周田埂种植三叶草、野菊花、芝麻、黄秋葵4种蜜源植物,为稻田天敌提供良好的栖息繁殖场所,建立持续稳定的稻田生态***;③平衡施肥:在移栽前犁田翻地,每亩施有机肥150-300公斤、碳酸氢铵20-40公斤、钙镁磷或过磷酸钙20-25公斤作为基肥,实施浅水移栽,提高水稻秧苗对病虫害的抵抗力;早施分蘖肥,秧苗移栽培后7-10天左右,每亩施尿素10-15公斤、氯化钾4-6公斤;④科学管水:头季稻浅水插秧,插秧后21天左右或每丛平均分蘖数达8-10本时及时排水烤田,间隔5-7天灌浅水,自然落干后再灌浅水,反复多次直到幼穗分化;
(2)物理防治措施:①田间设置频振式太阳能杀虫灯,每50亩左右设置一盏杀虫灯,有效减少二化螟、三化螟、大螟、稻纵卷叶螟和稻飞虱的发生量;②稻田养鸭,水稻移栽开始返青分蘖时,将雏鸭放入稻田饲养,每亩稻田放鸭15~25只,通过鸭子在稻田的活动,不但可以提高稻田有机质含量,还可减轻水稻纹枯病、稻飞虱和杂草的发生为害,在水稻破口抽穗前回收鸭子。
(3) 生物防治措施:①实施田间监测,在田间螟蛾成虫发生期,连片使用性诱剂,在稻田中心按每亩设置1个(二化螟和稻纵卷叶螟)诱捕器,诱捕器位置在高出稻苗约15-20厘米处,每间隔15天更换一次诱芯,在每1代螟蛾成虫交配产卵期连续使用性诱剂1-2次,可有效减少螟蛾数量,降低田间螟蛾害虫的卵和幼虫发生量及水稻受害率;②结合田间监测结果,实施天敌生物防治,在螟蛾产卵盛期,连片大量人工释放赤眼蜂,放蜂位置在在高出稻苗约15-20厘米处,按每亩均匀设置3-5个放蜂点,每亩次放蜂10000头,间隔3天放蜂一次,连续放蜂2-3次,对水稻螟虫具有良好的田间控制作用;③稻田四周田埂种植三叶草、野菊花、芝麻、黄秋葵4种蜜源植物,建立持续稳定的稻田生态***,为稻田赤眼蜂、瘿小蜂、绒茧蜂等寄生蜂及黑肩绿盲蝽、瓢虫、蜘蛛等捕食性天敌提供良好的栖息繁殖场所,充分发挥自然天敌对水稻害虫的生物控制作用,减少了害虫的发生为害。
(3)化学防治措施:在头季稻水稻秧苗移栽后2-3周左右,在一代二化螟卵孵高峰期,根据释放赤眼蜂生物防治效果并结合田间监测结果,在水稻害虫达到防治指标的情况下,选用20%氯虫苯甲酰胺悬浮剂6-12毫升/亩、10%溴氰虫酰胺悬浮剂20-30毫升/亩、24%甲氧虫酰肼悬浮剂20-30毫升/亩、5%甲氨基阿维菌素水分散粒剂15-20克/亩、20%呋虫胺可溶粒剂30-40克/亩高效低毒、对稻田天敌和生态环境友好型的化学药剂进行田间喷雾防治1次,同时可以达到兼治稻纵卷叶螟的效果;
3、头季稻孕穗期至抽穗期
(1)农业防治措施:①继续应用稻田四周田埂种植的三叶草、野菊花、芝麻、黄秋葵4种蜜源植物,为稻田天敌提供良好的栖息繁殖场所,建立持续稳定的稻田生态***;③平衡施肥:头季稻齐穗后14-21天内追施水稻催芽肥,每亩施尿素8-10公斤、氯化钾4-6公斤,更好地促进再生芽的萌发生长;④科学管水:幼穗分化后实行沟灌,保持稻田湿润状态,以增根壮杆及对水稻病虫害的抗逆能力,促进头季稻大穗高产。
(2)物理防治措施:①继续应用田间设置的频振式太阳能杀虫灯,每50亩左右设置一盏杀虫灯,有效减少二化螟、三化螟、大螟、稻纵卷叶螟和稻飞虱的发生量;②稻田养鸭,每亩放养15-25只鸭子,通过鸭子在稻田的活动,不但可以提高稻田有机质含量,还可减轻水稻纹枯病、稻飞虱和杂草发生为害,在水稻破口抽穗前回收鸭子。
(3) 生物防治措施:①实施田间监测,在水稻抽穗期及田间螟蛾成虫发生期,连片使用性诱剂,在稻田中心按每亩设置1个(二化螟和稻纵卷叶螟)诱捕器,诱捕器位置在高出稻苗约15-20厘米处,每间隔15天更换一次诱芯,每1代螟蛾成虫交配产卵期连续使用性诱剂1-2次,可有效减少螟蛾数量,降低田间螟蛾害虫的卵和幼虫发生量及水稻受害率;②进行田间监测,实施天敌生物防治,在螟蛾产卵盛期,连片大量人工释放赤眼蜂,放蜂位置在在高出稻苗约15-20厘米处,按每亩均匀设置3-5个放蜂点,每亩次放蜂10000头,间隔3天放蜂一次,连续放蜂2-3次,对水稻螟虫具有良好的田间控制作用;③科学管理稻田四周田埂种植的三叶草、野菊花、芝麻、黄秋葵4种蜜源植物,建立持续稳定的稻田生态***,为稻田赤眼蜂、瘿小蜂、绒茧蜂等寄生蜂及黑肩绿盲蝽、瓢虫、蜘蛛等捕食性天敌提供良好的栖息繁殖场所,充分发挥自然天敌对水稻害虫的生物控制作用,减少了害虫的发生为害。
(4)化学防治措施:实施病虫害监测,在头季稻破口抽穗期,结合田间监测结果,在二化螟卵孵高峰期及稻纵卷叶螟低龄幼虫期,当害虫达到防治指标的情况下,选用20%氯虫苯甲酰胺悬浮剂6-12毫升/亩、10%溴氰虫酰胺悬浮剂20-30毫升/亩、24%甲氧虫酰肼悬浮剂20-30毫升/亩、5%甲氨基阿维菌素水分散粒剂15-20克/亩、40%毒死蜱水乳剂80-100毫升/亩配伍使用10%烯啶虫胺水剂20-40毫升/亩、25%吡蚜酮可湿性粉剂20-30克/亩、22%氟啶虫胺腈悬浮剂15-20毫升/亩、20%呋虫胺水分散粒剂20-40克/亩、25%噻嗪酮可湿性粉剂20-30克/亩药剂对水稻螟虫、稻纵卷叶螟及稻飞虱采取协调兼治技术措施。同时根据田间水稻纹枯病发生情况,水稻纹枯病达到防治指标时,选择5%己唑醇悬浮剂80-100毫升/亩、25%丙环唑乳油30-40毫升/亩、30%苯醚甲环唑•丙环唑乳油15-20毫升/亩、75%肟菌酯•戊唑醇水分散粒剂10-15克/亩、240克/升噻呋酰胺悬浮剂15-25毫升/亩、325克/升苯醚甲环唑•嘧菌酯悬浮剂40-50毫升/亩对水稻纹枯病实施防治。保护头季稻茎杆不受病虫的严重为害,确保有足够具有较强活力的腋芽萌发,保证再生季水稻的产量和品质。
4、再生季腋芽萌发生长至抽穗期
(1)农业防治措施:①继续应用稻田四周田埂种植的三叶草、野菊花、芝麻、黄秋葵4种蜜源植物,为稻田天敌提供良好的栖息繁殖场所,建立持续稳定的稻田生态***;②平衡施肥:头季稻收割后1-3天内,每亩施尿素3-5公斤作为壮苗肥;再生季抽穗60%-70%左右时,采取根外施肥和喷洒生长调节剂,每亩兑水50公斤叶面喷施“九二0”2克、磷酸二氢钾150-200克,同时可视水稻长势情况,喷施浓度为1%的尿素;③科学管水:头季稻收割后及时灌浅水,自然落干后晒田2-3天,再灌浅水,反复多次,保持田间湿润透气状态,禁忌长期干旱或淹水。
(2)物理防治措施:继续应用田间设置的频振式太阳能杀虫灯,每50亩左右设置一盏杀虫灯,有效减少二化螟、三化螟、大螟、稻纵卷叶螟和稻飞虱害虫的发生量。
(3) 生物防治措施:①结合田间监测,在再生季水稻抽穗期及田间螟蛾成虫发生期,连片使用性诱剂,在稻田中心按每亩设置1个(二化螟和稻纵卷叶螟)诱捕器,诱捕器位置在高出稻苗约15-20厘米处,每间隔15天更换一次诱芯,每1代螟蛾成虫交配产卵期连续使用性诱剂1-2次,可有效减少螟蛾数量,降低田间螟蛾害虫的卵和幼虫发生量及水稻受害率;②天敌生物防治,在螟蛾产卵盛期,连片大量人工释放赤眼蜂,放蜂位置在在高出稻苗约15-20厘米处,按每亩均匀设置3-5个放蜂点,每亩次放蜂10000头,间隔3天放蜂一次,连续放蜂2-3次,对水稻螟虫具有良好的田间控制作用;③继续应用稻田四周田埂种植的蜜源植物,建立持续稳定的稻田生态***,为稻田寄生蜂和捕食性天敌提供良好的栖息繁殖场所,充分发挥自然天敌对水稻害虫的生物控制作用,减少了害虫的发生为害;
(4)化学防治措施:根据研究结果,对再生季水稻产量影响较大的主要病虫害是稻纵卷叶螟、稻飞虱和稻曲病,结合田间监测情况,在再生季水稻孕穗末期至抽穗期,当害虫达到防治指标的情况下,选用20%氯虫苯甲酰胺悬浮剂6-12毫升/亩,10%溴氰虫酰胺悬浮剂20-30毫升/亩、15%茚虫威悬浮剂10-15毫升/亩、1.8%阿维菌素乳油20-30毫升/亩、5%甲氨基阿维菌素水分散粒剂15-20克/亩、22%氰氟虫腙悬浮剂30-50毫升/亩、10%多杀霉素悬浮剂25-30毫升/亩、6%乙基多杀菌素悬浮剂20-30毫升/亩、40%毒死蜱乳油80-100毫升/亩、苏云金杆菌,配伍使用稻飞虱防治药剂10%烯啶虫胺水剂20-40毫升/亩、25%吡蚜酮可湿性粉剂20-30克/亩、22%氟啶虫胺腈悬浮剂15-20毫升/亩、20%呋虫胺水分散粒剂20-40克/亩、25%噻嗪酮可湿性粉剂20-30克/亩,对再生季水稻稻纵卷叶螟、稻飞虱主要害虫喷雾施药防治1次,以有效保证再生季水稻的产量和品质。同时根据田间稻曲病病原菌发生情况,在再生季水稻破口抽穗前7天或结合稻纵卷叶螟和稻飞虱防治工作对稻曲病防治1次,可使用430克/升戊唑醇悬浮剂10-15毫升/亩、5%己唑醇悬浮剂80-100毫升/亩、25%咪鲜胺悬浮剂60-80毫升/亩、75%肟菌酯•戊唑醇水分散粒剂15-20克/亩、24%腈苯唑悬浮剂15-20毫升/亩有效药剂。
5、构建农药减量使用的再生稻主要病虫害综合防控技术体系,遵循“预防为主,综合防治”的植物保护方针,在明确再生稻种植栽培过程中易受水稻主要病虫害侵染受害并对水稻产量具有重大影响的关键生长期,优化组装 “虫情监测、农业防治、物理防治、生物防治及化学防治”5项防治技术措施。
具体实施方式:
以下为本发明在福建省三明市沙县再生稻种植示范区的具体实施例,以对本发明作进一步的说明和描述,但这些说明与描述并非对本发明内容的进一步限定,本领域范围内的相关人员应理解,对本发明内容所作的等同替换、均等变化与修饰或相应的改进等,皆应属于本发明的涵盖范围,仍属于本发明的保护范围之内。
1.虫情监测:采用有效积温法、期距法、物候期及诱集观测技术手段对水稻稻飞虱、二化螟、稻纵卷叶螟、水稻纹枯病、稻曲病、稻瘟病水稻主要病虫害实施田间监测,根据田间病虫害种群数量及发展趋势,适时发布主要病虫害灾变及防治预警;
2.农业防治:①选择再生能力强、对水稻主要病虫害具有较强抗性的水稻品种作为再生稻栽培品种,选择天优华占、两优616、宜优673、Y两优1号、两优8676等5个水稻品种;②严格按照晒种、定播种期、浸种、催芽、播种的流程培育壮秧;③利用螟蛾类害虫化蛹期抗逆性弱的特性,在春季螟虫化蛹期结合春耕农事操作,铲除销毁田边杂草,稻桩深埋,每亩撒施生石灰75公斤左右,春耕灌水10天,以灭杀越冬虫源和病原菌;④稻田四周田埂种植三叶草、野菊花、芝麻、黄秋葵4种蜜源植物,建立持续稳定的稻田生态***;⑤平衡施肥:头季稻移栽前犁田翻地,每亩施有机肥200公斤、碳酸氢铵30公斤、过磷酸钙20公斤作为基肥,实施浅水移栽,提高水稻秧苗对病虫害的抵抗力;早施分蘖肥,秧苗移栽培后10天,每亩施尿素10公斤、氯化钾5公斤;头季稻齐穗后15天追施水稻催芽肥,每亩施尿素10公斤、氯化钾5公斤,更好地促进再生芽的萌发生长。再生季施肥方法,头季稻收割后1天,每亩施尿素5公斤作为壮苗肥;再生季抽穗60%-70%左右时,采取根外施肥和喷洒生长调节剂,每亩兑水50公斤叶面喷施“九二0”2克、磷酸二氢钾150-200克,水稻植株长势较弱的田块加施浓度为1%的尿素;⑥科学管水:头季稻浅水插秧,插秧后21天即每从分蘖数8-10本时排水烤田,间隔7天灌浅水,自然落干后再灌浅水,反复多次直到幼穗分化,幼穗分化后实行沟灌,保持稻田湿润状态,以增根壮杆及对病虫害的抗逆能力,促进头季稻大穗高产;头季稻收割后及时灌浅水,自然落干后晒田3天,再灌浅水,反复多次,保持田间湿润透气状态。
3.物理防治:①田间设置频振式太阳能杀虫灯,每50亩设置一盏杀虫灯,有效减少了二化螟、三化螟、大螟、稻纵卷叶螟和稻飞虱害虫的发生量;②稻田养鸭,水稻移栽后开始返青分蘖时,将雏鸭放入稻田饲养,每亩稻田放鸭20只,通过鸭子在稻田的活动,不但有效提高了稻田有机质含量,还有效减轻了水稻纹枯病、稻飞虱和杂草的发生为害,在水稻破口抽穗前回收鸭子。
4.生物防治:①结合田间监测,在头季稻移栽后1周,连片使用二化螟性诱剂,在稻田中心按每亩设置1个二化螟诱捕器,诱捕器位置在高出稻苗约15-20厘米处,每间隔15天更换一次诱芯,有效减少了二化螟的数量,二化螟害虫减少率达70%以上,降低了头季稻分蘖期水稻植株的受害率,水稻枯鞘率下降70%以上;取得了显著的生物防治效果。②天敌生物防治,在螟蛾产卵盛期,连片大量人工释放赤眼蜂,放蜂位置在在高出稻苗约15-20厘米处,按每亩均匀设置3-5个放蜂点,每亩次放蜂10000头,间隔3天放蜂一次,连续放蜂3次,对水稻螟虫具有良好的田间控制作用,水稻螟虫数量减少70%以上,水稻植株受害率减少70%以上;取得了显著的生物防治效果。
③稻田四周田埂种植三叶草、野菊花、芝麻、黄秋葵4种蜜源植物,建立持续稳定的稻田生态***,为稻田寄生蜂和捕食性天敌提供良好的栖息繁殖场所,蜜源植物上有大量的蜘蛛、瓢虫、寄生蜂等自然天敌,稻田天敌数量较对照区增加30%以上,充分发挥了自然天敌对水稻害虫的生物控制作用,减少了害虫的发生为害,通过稻田种植蜜源植物实施生态调控,水稻受害率减少10%以上,取得显著的生物控制效果。
5.化学防治:①种子浸种催芽后,播种前选用31.9%吡虫啉•戊唑醇悬浮种衣剂(有效成分111.75-335.25克/100千克种子)、7%吡虫啉•咪鲜胺悬浮种衣剂(有效成分58.35-87.5克/100千克种子)、35%噻虫嗪•咪鲜胺悬浮种衣剂(有效成分70-87.5克/100千克种子)水稻专用种衣剂包衣拌种处理,有效控制了秧苗期稻飞虱、稻蓟马、恶苗病的发生为害,减少了本田期水稻黑条矮缩病发病率,秧苗期稻飞虱数量减少60%以上,稻蓟马数量减少80%以上,水稻秧苗受害率减少80%以上,秧苗期水稻恶苗病减少75%以上;②在头季稻水稻秧苗移栽后16天,在一代二化螟卵孵高峰期,结合释放赤眼蜂生物防治效果和田间监测结果的情况下,当害虫达到防治指标的情况下,选用20%氯虫苯甲酰胺悬浮剂6-12毫升/亩、10%溴氰虫酰胺悬浮剂20-30毫升/亩、24%甲氧虫酰肼悬浮剂20-30毫升/亩、5%甲氨基阿维菌素水分散粒剂15-20克/亩高效低毒、对稻田天敌和生态环境友好型的化学药剂进行田间喷雾防治一次,二化螟防治效果达85%以上,同时对稻纵卷叶螟兼治效果达80%以上;③在头季稻破口抽穗期,在二化螟卵孵高峰期及稻纵卷叶螟低龄幼虫发生高峰期,结合田间监测结果,当害虫达到防治指标的情况下,用20%氯虫苯甲酰胺悬浮剂6-12毫升/亩、10%溴氰虫酰胺悬浮剂20-30毫升/亩、24%甲氧虫酰肼悬浮剂20-30毫升/亩、5%甲氨基阿维菌素水分散粒剂15-20克/亩、40%毒死蜱水乳剂80-100毫升/亩药剂配伍使用10%烯啶虫胺水剂20-40毫升/亩、25%吡蚜酮可湿性粉剂20-30克/亩、22%氟啶虫胺腈悬浮剂15-20毫升/亩、20%呋虫胺水分散粒剂20-40克/亩、25%噻嗪酮可湿性粉剂20-30克/亩药剂喷雾施药防治1次,对水稻螟虫、稻纵卷叶螟、稻飞虱的防效分别达85%、80%、85%以上。同时根据田间水稻纹枯病发生情况,水稻纹枯病达到防治指标时选择5%己唑醇悬浮剂80-100毫升/亩、25%丙环唑乳油30-40毫升/亩、30%苯醚甲环唑•丙环唑乳油15-20毫升/亩、75%肟菌酯•戊唑醇水分散粒剂10-15克/亩、240克/升噻呋酰胺悬浮剂15-25毫升/亩、325克/升苯醚甲环唑•嘧菌酯悬浮剂40-50毫升/亩对水稻纹枯病实施防治1次,对水稻纹枯病防治效果80%以上。有效保护了头季稻茎杆不受病虫的为害,确保有足够具有较强活力的腋芽萌发,保证再生季水稻的产量和品质。④根据田间监测情况,在再生季水稻孕穗末期,当害虫达到防治指标的情况下,选用20%氯虫苯甲酰胺悬浮剂6-12毫升/亩,10%溴氰虫酰胺悬浮剂20-30毫升/亩、15%茚虫威悬浮剂10-15毫升/亩、1.8%阿维菌素乳油20-30毫升/亩、5%甲氨基阿维菌素水分散粒剂15-20克/亩、22%氰氟虫腙悬浮剂30-50毫升/亩、10%多杀霉素悬浮剂25-30毫升/亩、6%乙基多杀菌素悬浮剂20-30毫升/亩、40%毒死蜱乳油80-100毫升/亩、苏云金杆菌,配伍使用稻飞虱防治药剂10%烯啶虫胺水剂20-40毫升/亩、25%吡蚜酮可湿性粉剂20-30克/亩、22%氟啶虫胺腈悬浮剂15-20毫升/亩、20%呋虫胺水分散粒剂20-40克/亩、25%噻嗪酮可湿性粉剂20-30克/亩,根据田间稻曲病菌情况,选用430克/升戊唑醇悬浮剂10-15毫升/亩、5%己唑醇悬浮剂80-100毫升/亩、25%咪鲜胺悬浮剂60-80毫升/亩、75%肟菌酯•戊唑醇水分散粒剂15-20克/亩、24%腈苯唑悬浮剂15-20毫升/亩对稻曲病有效药剂,对再生季水稻稻纵卷叶螟、稻飞虱、稻曲病主要病虫害喷雾施药防治1次,对稻纵卷叶螟和稻飞虱的防效均达85%以上,对稻曲病的防效达80%以上。化学防治模式可概述为(T1+T2+T3+Z1),其中,T1表示秧田期通过种衣剂浸种或拌种包衣处理对水稻病虫害防治一次;T2表示头季稻本田分蘖期以二化螟、稻纵卷叶螟主要害虫为主喷雾施药防治1次;T3表示头季稻孕穗末期至抽穗期以水稻二化螟、稻纵卷叶螟、稻飞虱和水稻纹枯病为主喷雾施药防治一次;Z1表示再生季孕穗末期至抽穗期以稻纵卷叶螟、稻飞虱、稻曲病为主喷雾施药防治1次。
6. 采用本发明技术方法,即在示范区内应用农药减量使用的再生稻主要病虫害综合防控方法,根据实际调查结果表明,综合防治效果85%以上,与农民防治相比,农药使用次数减少2-3次,生产成本降低30-50%,稻米品质达到无公害食品标准,不但显著降低了水稻粮食的生产成本,也显著提高了稻谷产量和品质,同时也有效修复或改善了稻田生态环境,增强了稻田生态***对病虫害的生态调控功能,取得了显著的经济、社会和生态效益。
以上所述仅为本发明的较佳实施例,凡依本发明申请专利范围所做的均等变化与修饰,皆应属本发明的涵盖范围。

Claims (5)

1.一种农药减量使用的再生稻主要病虫害综合防控方法,其特征在于,该综合防控方法将再生稻生长过程分为头季稻秧苗期培育壮秧期、头季稻秧苗移栽期至分蘖期、头季稻孕穗期至抽穗期、再生季腋芽萌发生长至抽穗期4个时期,并在每个时期实施由农业、物理、生物和化学防治措施组成的综合防控方法。
2.根据权利要求1所述的一种农药减量使用的再生稻主要病虫害综合防控方法,其中,农业防治技术措施包括:
①选择再生能力强、对水稻主要病虫害具有较强抗性的水稻品种作为再生稻栽培品种;
②严格按照晒种、定播种期、浸种、催芽、播种的流程培育壮秧;
③利用螟蛾类害虫化蛹期抗逆性弱的特性,在春季螟虫化蛹期结合春耕农事操作,铲除销毁田边杂草,稻桩深埋,每亩撒施生石灰75公斤,春耕灌水7-10天,以灭杀越冬虫源和病原菌;
④稻田四周田埂种植蜜源植物,建立持续稳定的稻田生态***;
⑤平衡施肥:
头季稻施肥方法:在移栽前犁田翻地,每亩施有机肥150-300公斤、碳酸氢铵20-40公斤、钙镁磷或过磷酸钙20-25公斤作为基肥,实施浅水移栽,提高水稻秧苗对病虫害的抵抗力;早施分蘖肥,秧苗移栽培后7-10天,每亩施尿素10-15公斤、氯化钾4-6公斤;头季稻齐穗后14-21天内追施水稻催芽肥,每亩施尿素8-10公斤、氯化钾4-6公斤,更好地促进再生芽的萌发生长;
再生季施肥方法:头季稻收割后1-3天内,每亩施尿素3-5公斤作为壮苗肥;再生季抽穗60%-70%时,采取根外施肥和喷洒生长调节剂,每亩兑水50公斤叶面喷施“九二0”2克、磷酸二氢钾150-200克,同时可视水稻长势情况,喷施浓度为1%的尿素;
⑥科学管水:头季稻浅水插秧,插秧后21天或每丛平均分蘖数达8-10本时及时排水烤田,间隔5-7天灌浅水,自然落干后再灌浅水,反复多次直到幼穗分化,幼穗分化后实行沟灌,保持稻田湿润状态,以增根壮杆并增强对病虫害的抗逆能力,促进头季稻大穗高产;头季稻收割后及时灌浅水,自然落干后晒田2-3天,再灌浅水,反复多次,保持田间湿润透气状态,禁忌长期干旱或淹水。
3.根据权利要求1所述的一种农药减量使用的再生稻主要病虫害综合防控方法,其中,物理防治技术措施包括:
①田间设置频振式太阳能杀虫灯,每50亩设置一盏杀虫灯,有效减少二化螟、三化螟、大螟、稻纵卷叶螟和稻飞虱的发生量;
②稻田养鸭,水稻移栽后开始返青分蘖时,将雏鸭放入稻田饲养,每亩稻田放鸭15~25只,通过鸭子在稻田的活动提高稻田有机质含量并减轻水稻纹枯病、稻飞虱和杂草的发生为害,在水稻破口抽穗前回收鸭子。
4.根据权利要求1所述的一种农药减量使用的再生稻主要病虫害综合防控方法,其中,生物防治技术措施包括:
①结合田间监测,在田间螟蛾成虫发生期,连片使用性诱剂,在稻田中心每亩设置1个诱捕器,诱捕器位置在高出稻苗15-20厘米处,每间隔15天更换一次诱芯,在每1代螟蛾成虫交配产卵期连续使用性诱剂1-2次,降低田间螟蛾害虫的卵和幼虫发生量及水稻受害率;
②天敌生物防治,在螟蛾产卵盛期,连片大量人工释放赤眼蜂,放蜂位置在在高出稻苗15-20厘米处,每亩均匀设置3-5个放蜂点,每亩次放蜂10000头,间隔3天放蜂一次,连续放蜂2-3次,对水稻螟虫具有良好的田间控制作用;
③稻田四周田埂种植蜜源植物,建立持续稳定的稻田生态***,为稻田寄生蜂和捕食性天敌提供良好的栖息繁殖场所,充分发挥自然天敌对水稻害虫的生物控制作用,减少了害虫的发生为害。
5.根据权利要求1所述的一种农药减量使用的再生稻主要病虫害综合防控方法,其中,化学防治技术措施包括:
①用种衣剂浸种或催芽,播种前选用有效成分为111.75-335.25克/100千克种子的31.9%吡虫啉·戊唑醇悬浮种衣剂58.35-87.5克/100千克种子的7%吡虫啉·咪鲜胺悬浮种衣剂或有效成分为70-87.5克/100千克种子的35%噻虫嗪·咪鲜胺悬浮种衣剂包衣拌种处理,有效控制秧苗期稻飞虱、稻蓟马及秧苗期恶苗病、预防水稻黑条矮缩病;
②在头季稻水稻秧苗移栽后2-3周,在一代二化螟卵孵高峰期,根据释放赤眼蜂生物防治效果并结合田间监测结果,在水稻害虫达到防治指标的情况下,选用高效低毒、对稻田天敌和生态环境友好型的化学药剂20%氯虫苯甲酰胺悬浮剂6-12毫升/亩或10%溴氰虫酰胺悬浮剂20-30毫升/亩或24%甲氧虫酰肼悬浮剂20-30毫升/亩或5%甲氨基阿维菌素水分散粒剂15-20克/亩或20%呋虫胺可溶粒剂30-40克/亩进行田间喷雾防治一次,同时可以达到兼治鳞翅目害虫的效果;
③在头季稻破口抽穗期,结合田间监测结果,在二化螟卵孵高峰期及稻纵卷叶螟低龄幼虫期选用20%氯虫苯甲酰胺悬浮剂6-12毫升/亩或10%溴氰虫酰胺悬浮剂20-30毫升/亩或24%甲氧虫酰肼悬浮剂20-30毫升/亩或5%甲氨基阿维菌素水分散粒剂15-20克/亩或40%毒死蜱水乳剂80-100毫升/亩配伍使用10%烯啶虫胺水剂20-40毫升/亩或25%吡蚜酮可湿性粉剂20-30克/亩或22%氟啶虫胺腈悬浮剂15-20毫升/亩或20%呋虫胺水分散粒剂20-40克/亩或25%噻嗪酮可湿性粉剂20-30克/亩对水稻螟虫、稻纵卷叶螟及稻飞虱采取协调兼治技术措施;同时根据田间水稻纹枯病发生情况,水稻纹枯病达到防治指标时选择5%己唑醇悬浮剂80-100毫升/亩或25%丙环唑乳油30-40毫升/亩或30%苯醚甲环唑·丙环唑乳油15-20毫升/亩或75%肟菌酯·戊唑醇水分散粒剂10-15克/亩或240克/升噻呋酰胺悬浮剂15-25毫升/亩或325克/升苯醚甲环唑·嘧菌酯悬浮剂40-50毫升/亩对水稻纹枯病实施防治,保护头季稻茎杆不受病虫的严重为害,确保有足够具有较强活力的腋芽萌发,保证再生季水稻的产量和品质;
④再生季水稻病虫害化学防治技术,对再生季水稻产量影响较大的主要病虫害是稻纵卷叶螟、稻飞虱和稻曲病,在再生季水稻孕穗末期至抽穗期,根据田间监测结果,当水稻病虫害达到防治指标情况下,选用20%氯虫苯甲酰胺悬浮剂6-12毫升/亩或10%溴氰虫酰胺悬浮剂20-30毫升/亩或15%茚虫威悬浮剂10-15毫升/亩或1.8%阿维菌素乳油20-30毫升/亩或5%甲氨基阿维菌素水分散粒剂15-20克/亩或22%氰氟虫腙悬浮剂30-50毫升/亩或10%多杀霉素悬浮剂25-30毫升/亩或6%乙基多杀菌素悬浮剂20-30毫升/亩或40%毒死蜱乳油80-100毫升/亩或苏云金杆菌配伍使用稻飞虱防治药剂10%烯啶虫胺水剂20-40毫升/亩或25%吡蚜酮可湿性粉剂20-30克/亩或22%氟啶虫胺腈悬浮剂15-20毫升/亩或20%呋虫胺水分散粒剂20-40克/亩或25%噻嗪酮可湿性粉剂20-30克/亩,对再生季水稻主要害虫喷雾施药防治一次,以有效保证再生季水稻的产量和品质;根据田间稻曲病病原菌发生情况,在再生季水稻破口抽穗前7天或结合稻纵卷叶螟和稻飞虱防治工作对稻曲病防治1次,可使用430克/升戊唑醇悬浮剂10-15毫升/亩或5%己唑醇悬浮剂80-100毫升/亩或25%咪鲜胺悬浮剂60-80毫升/亩或75%肟菌酯·戊唑醇水分散粒剂15-20克/亩或24%腈苯唑悬浮剂15-20毫升/亩进行喷洒。
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