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松针褐斑病是国内森林植物检疫对象之一,主要危害湿地松、火炬松、长叶松、黑松等,在我市主要危害黑松。据1986年调查,全市生产经营黑松、五针松的单位有一千余家,生产1—2年生用黑松作(木占)木的五针松嫁接小苗达450余万株。由于五针松嫁接苗经济效益高,无性繁殖容易,所以发展速度很快。嫁接五针松用的(木占)木—黑松,也大量从省内外调入我
Pine needle brown spot disease is one of the domestic forest plant quarantine objects, the main hazards of Pinus elliottii, loblolly pine, gynostemma, black pine, etc., the main hazards in the city of black pine. According to the 1986 survey, the city’s production and operation of Pinus thunbergii, Pinus pine units have more than a thousand, producing 1-2 years with black pine (wood) wood Pinus sylvestris grafted 450 million. Due to the high economic benefits of Pinus sylvestris grafted seedlings, asexual reproduction is easy, so the development speed is very fast. Grafted five needle pine (wood accounted for) wood - black pine, but also a lot transferred to me from inside and outside the province