南方水稻黑条矮缩病药剂防治效果试验

Control effect of pesticides against southern rice black-streaked dwarf disease

南方水稻黑条矮缩病是由传毒媒介白背飞虱传播所致,目前治虱防矮是防治南方水稻黑条矮缩病的重要手段。为寻找防治南方水稻黑条矮缩病的有效方法,研究了不同药剂拌种、秧田期及本田初期喷雾并施用氨基酸肥料等田间防病效果。结果表明,使用70%噻虫嗪种子包衣(2 g/kg)于一叶一心期、移栽前2 d、移栽后7 d、移栽后22 d各喷雾1次后,水稻生长期内秧苗粗壮、叶色浓绿、分蘖增多。该施药方案对白背飞虱防效达77.41%,对南方水稻黑条矮缩病的防效达91.44%,可在生产上推广应用。

Southern rice black-streaked dwarf disease（SRBSDD）is transmitted by small white-backed planthopper Sogatella furcifera. Controlling the population of this pest is the most efficent way to prevent epidemic of SRBSDD. To find effective method for prevention of SRBSDD,the field control effects of different pesticide treatments with pesticide-coating,seedling spraying and early field spraying mixed with application of amino acid fertilizer were studied. The results showed that the effective control method of SRBSDD was a complex one,including rice seedcoating（2 g/kg seeds）with 70% thiamethoxam WS before sowing,spraying at the 1-leaf stage,on the second day before transplanting,the seventh day and the twenty-second day after transplanting,respectively. By the treatment,rice had stronger and more sprouts,with thicker green leaves during the rice growing stage,and the control effects on S. furcifera and SRBSDD amounted to 77. 41% and 91.44%,indicating this pesticide solution could be extended and applied widely.