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湿地松或火炬松1年生苗,用一定浓度多菌灵或甲基托布津泥浆根系打浆处理,然后定植于苗圃中。30～50天后接种松针褐斑病菌(Lecanosticta acicola),又经50天左右检查感病情况;或将处理苗定植于发病林地上,任其自然发病,每年检查感病情况,共2～3年。所有杀菌剂处理浓度,在短期或1年内均可显著降低松针褐斑病的侵染,当年松苗感病程度与杀菌剂处理浓度没有明显相关性。但第2年或第3年,松苗感病程度随时间而增加,且与杀菌剂处理浓度呈明显负相关。结果表明,松苗定植前用含有效成分3％～5％多菌灵或含有效成分5％～10％甲基托布津泥浆处理根部,可在2～3年内有效地防止松针褐斑病的侵染。
Pinus elliottii or Pinus taeda, are beaten with a certain concentration of carbendazim or methyl thiophanate, and then colonized in the nursery. 30 to 50 days after inoculation of Lecanosticta acicola, and 50 days to check the disease situation; or seedlings will be planted in the disease on the woodland, let it naturally occur, check the disease each year, a total of 2 to 3 years . The concentration of all fungicides could significantly reduce pine needle brown spot infection in short term or within one year. There was no significant correlation between the susceptible degree of pine seedlings and the concentration of fungicides. However, in the second year or the third year, the susceptible degree of pine seedlings increased with time, and was negatively correlated with the concentration of fungicides. The results showed that pine seedling brown spot could be effectively prevented within 2-3 years after the seedlings were treated with 3% ~5% carbendazim or 5% ~ 10% thiophanate-methyl as active ingredient before planting dye.