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一、巨绵蚧为害的情况巨绵蚧[MegapulVinaria maxima(Green)]是千年桐、光桐毁灭性的大害虫。寄主被害后,轻者,降低树木的生长势,减少产量;重者造成单株或成片枯死。1971至1973年,作者连年在柳城县东泉华侨农场看到十年生以上的大片千年桐林被害的情况。兹举1971年为例:巨绵蚧危害的中心地带,林木一片焦黑,枝上巨绵蚧栉比相依,几无插针之地。由于巨绵蚧排出密露,枝、干、叶及地面铺满黑色煤菌,千年桐成片枯死,最大的一片共枯死38株,零星死亡的不计在内,树上果实变黑、干瘪,少数留在树梢,多数脱落地面,在巨绵蚧危害中心的外圈,千年桐一片枯黄,枝、叶、果上均布满巨绵蚧,一片白色的卵囊或卵囊的残
First, the damage of giant scales Melastoma gigas [MegapulVinaria maxima (Green)] is a Millennium, Kwong Tong destructive pests. After the host was killed, the light, reduce the growth potential of trees, reduce production; severe cases caused by single or into pieces died. From 1971 to 1973, the author year after year at the Dongquan Overseas Chinese Farm in Liucheng County saw a large-scale millennium Tonglin murdered over 10 years of age. Let me give you an example in 1971: Giant Melastoma endangered the center, a piece of trees dark, sturdy cotton bolls dependent, few pin-point. Due to the giant mealybug excreted dew, branches, stems, leaves and the ground covered with black coal bacteria, Millennium Tong adult dead, the largest piece of a total of 38 dead, excluding sporadic death, the trees dark, shriveled, A small number of stay in the treetops, the majority of the ground off, in the outer ring Melastometum harm Center, Millennium Tong a yellow, branches, leaves, fruits are covered with giant mealybugs, a white oocyst or oocyst residue