摘要
1986～1988年,系统观察了牡丹、芍约根结线虫病害的症状。发现根结线虫侵染牡丹、芍药的营养根,不侵染主根系。发病严重的植株,单株根结重量可达300～400g;形态学研究证明:牡丹根结线虫为北方根结线虫(Meloidogyne hapla);芍药根结线虫为南方根结线虫(M.incognita)。牡丹、芍药田间的许多杂草是据结线虫的野生寄主。初步防治试验认为:秋季(9月中旬),分根移栽时,用40%甲基异柳磷乳油杀线剂1000倍液浸根10min,防效为75%。在生长季(4月下旬),用10%克线磷或15%涕灭威颗粒杀线剂处理田间土壤,防效分别为62%,74%左右。
Disease symptoms of root-knot nematodes on the Paeonia(peony) were observed and described systematicallp in 1986～1988.We found that root-knot nematodes infected nutrient root on the Paeonia.When the disease became serio- us,the weight of root-knot of single plant was 300～400g.According to the mor- phological characteristic studies,it is proved that root-knot nematodes of P. suffruticosa Andr.are Northern Root-knot Nematode(Meloidogyne hapla),and those on root-knot of Paeinia Laciflora Pall.are Southern Root-knot Nematode (M.incognita),and many weeds are the wild hosts of root-knot nematodes in paeonia fields. Preliminary controlled result:when isolated root was transplanted in autu- mn(the middle ten days of September),we used nematocide of 40% isofenphos lacteous oil(1000 times)of root soaking for ten minutes treatment,the contro- lled effect was 75% or in growing season(the last ten days of April),we used 10% Fenamiphos granulated nematocide for diseased soil treatment in diseased fields.The controlled effect was 61% and used 15% Aldicark granulated nemato- cide for soil treatment in diseased fields.The controlled effect was 74%.
