摘要
对影响冷季型草坪腐霉病发生因子的研究和调查结果表明 :冷季型草坪草的苗期处于 2 0～30℃ ,持续高湿 ,密植 ( 3～ 5株 /cm2 )等条件下最易遭受腐霉病菌的侵害 ;病害发生与 4～ 9月间连续下雨天数 (天数 /月 )的关系为y =1.4 82 +1.576x ,r=0 .92 6,与日照 (时数 /日 )的关系为y =30 .776- 3.542x ,r=一 0 .978;腐霉病发生同草坪播种期关系密切 ,湿热季节 ( 4月上旬至 8月下旬 )播种病害为害严重 ,对这类草坪连续喷 4次甲霜灵或乙磷铝仍不能有效地控制病害的为害。雨后积水的草坪常可导致毁坪。
The results of experiment and investigation showed that the most favorable conditions for spp. infecting seedlings of cool-season grasses were at 20-30℃, continuous high humidity all close Planting (3- 5 seedlings/cm2) .A correlation(r= 0.926) was found between area of dead turf mass(% ) and day for dayraining (day/month) during Apr. to Sept, with the equation y = 1 .428 + 1 .576x; and a negative correlation(r=-0.978) between area of dead turf mass and sunshine (h/day), with the equation y = 30.776-3.542x.There was dose relation between the disease occurrence and the sowing for when sowing in wet-hot season.
出处
《浙江农业学报》
CSCD
2000年第3期136-139,共4页
Acta Agriculturae Zhejiangensis
关键词
冷季型草坪
腐霉病
发生规律
防治
气侯
播期
cool-season grasses
Pythium disease
occurrence
influence factor
