CAJ | 학술논문

分析了白背飞虱在杭州地区主栽水稻品种、杀虫剂在拌种和喷雾使用方式下的发生动态及其对南方水稻黑条矮缩病( southern rice black‐streaked dwarf disease ,SRBSDD)的影响.结果表明：在主栽水稻品种上白背飞虱虫量与SRBSDD的病情呈显著正相关,齐穗期SRBSDD病情指数(Y1)与8月初( X2)、9月初( X4)的白背飞虱密度呈显著正相关,预测模型为Y 1＝－7.962＋0.110 X2＋2.505 X4( r＝0.808, P＜0.0006),表明秧田期和本田初期白背飞虱迁入造成的初侵染、主害代(8月份)白背飞虱传毒造成的再侵染对后期SRBSDD发生程度均有显著影响；药剂拌种和喷雾2种施药方式对白背飞虱均有较好的控制效果,通过控制传毒媒介昆虫对SRBSDD预防效果明显,其中吡虫啉种衣剂拌种、氯虫?噻虫嗪水分散粒剂喷雾处理预防效果最佳,分别为61.7％和73.2％；白背飞虱田间防效、虫口密度与后期SRBSDD防效、病情指数均呈显著的正相关.因此,在白背飞虱的南方水稻黑条矮缩病毒带毒率较高的情况下,可采用药剂拌种或在秧田期和大田初期喷雾,重点防治白背飞虱,降低带毒飞虱基数及种群增长率,降低主害代侵入风险,达到防控SRBSDD的为害和流行的目的.
분석료백배비슬재항주지구주재수도품충、살충제재반충화분무사용방식하적발생동태급기대남방수도흑조왜축병( southern rice black‐streaked dwarf disease ,SRBSDD)적영향.결과표명：재주재수도품충상백배비슬충량여SRBSDD적병정정현저정상관,제수기SRBSDD병정지수(Y1)여8월초( X2)、9월초( X4)적백배비슬밀도정현저정상관,예측모형위Y 1＝－7.962＋0.110 X2＋2.505 X4( r＝0.808, P＜0.0006),표명앙전기화본전초기백배비슬천입조성적초침염、주해대(8월빈)백배비슬전독조성적재침염대후기SRBSDD발생정도균유현저영향；약제반충화분무2충시약방식대백배비슬균유교호적공제효과,통과공제전독매개곤충대SRBSDD예방효과명현,기중필충람충의제반충、록충?새충진수분산립제분무처리예방효과최가,분별위61.7％화73.2％；백배비슬전간방효、충구밀도여후기SRBSDD방효、병정지수균정현저적정상관.인차,재백배비슬적남방수도흑조왜축병독대독솔교고적정황하,가채용약제반충혹재앙전기화대전초기분무,중점방치백배비슬,강저대독비슬기수급충군증장솔,강저주해대침입풍험,체도방공SRBSDD적위해화류행적목적.
Summary In recent years , southern rice black‐streaked dwarf virus (SRBSDV) has spread rapidly in Southern China and caused a serious viral dwarf disease . The white‐backed planthopper (WBPH) Sogatella furcifera is a main vector for SRBSDD transmission . Use of disease resistant cultivars and insect vector control are the most economical and environmentally friendly strategy for arboviral disease control . This research focused on the resistance to SRBSDD among different rice varieties . The relationship between density of insect vectors and occurrence degree of SRBSDD was examined , and the effectiveness of disease management with controlling WBPH was measured , to build a predictive model for the occurrence of disease and damage degree of SRBSDD . In this study , we investigated the population dynamics of WBPH on 17 rice varieties in Hangzhou , China and created a predictive model for SRBSDD . The results showed that the population densities of WBPH and the disease indexes of SRBSDD on different rice varieties were significantly different , which were highest on the four rice varieties , including Yueyou 9113 , Tianyouhuazhan , Y‐Liangyou 2 and New‐Liangyou 6 . Statistical analysis demonstrated that the disease index of SRBSDD was significantly positively correlated with the population density of WBPH . For example , the disease index of SRBSDD at heading stage ( Y1 ) was significantly positively correlated with the population density of WBPH in early August ( X2 ) or early September ( X4 ) . The predictive model for SRBSDD was Y1 = -7 .962+0 .110X2 +2 .505X4 ( r=0 .808 , P<0 .000 6) . The results confirmed the critical role of WBPH in primary infection during seedling stage to early growth stage and in secondary infection of SRBSDV , which affected the occurrence degree of SRBSDD significantly . Meanwhile , we compared the population density of WBPH and control effectiveness of SRBSDD after different pesticide treatments . The seed treatment of imidacloprid FS and the foliar application of Virtako WG 40% ( chlorantraniliprole 20% + thiamethoxam 20% ) decreased spread of SRBSDV by 61 .7% and 73 .2%respectively . The control effectiveness and disease indexes of SRBSDD showed a significant positive relationship with the population density and control effectiveness of WBPH . In conclusion , it is possible to predict the occurrence degree of SRBSDD , based on the population density of WBPH at early growth phase of rice . Using seed treatments and foliar applications of pesticides at seedling stage or early growth phase of rice is an effective way to control the disease by decreasing the major primary infection source of SRBSDV .