人参生长期的侵染性病害一、人参地上部病害 (一) 人参黑斑病该病是各产区普遍发生的一种病害,被害率高,危害较为严重,是成株人参地上部的主要病害。发病率一般在30％左右,严重的可达70～80％,常造成参根减产或参籽干瘪无收成。本病发病以叶为主,其茎、花梗、果实亦可被害,严重的根部亦可被侵染。叶片被侵染后,初期叶面上散生直径5～10毫米圆 Ginseng growth stage of the infested diseases First, the ginseng top disease (a) ginseng black spot disease is a common occurrence in various producing areas, the high rate of damage, the more serious hazard is the upper part of adult ginseng root Diseases. The incidence is generally about 30%, severe up to 70 to 80%, often resulting in reduced production of ginseng root or dried shriveled seed. The incidence of disease-based leaves, the stems, pedicels, fruits can also be harmed, severe roots can also be infected. After the leaves are infected, the initial leaf surface scattered diameter of 5 to 10 mm