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正确识别和诊断家蚕蚕病,对采取相应防治措施夺取养蚕无病丰产有着重要意义。现将几种传染性蚕病的识别、诊断简介如下。 一、病毒性蚕病 (一)中肠型脓病 中肠型脏病农村叫干白肚,各个蚕期都有发生,尤以夏秋期发病更为严重,是家蚕主要病害之一。发病蚕儿群体大小不匀,眠起不齐,发育缓慢,蚕体瘦小,灰黄,食桑减少或不食,常爬到蚕座外缘平伙不动,粪粒变形发粘。起蚕发病是起缩症状,体皮松皱带有锈色;四、五龄2—3日后发病,胸部略透明呈空头症状;病重则完全停止食桑,第二、三胸节扁瘪多皱,腹部肿胀,尾部萎缩,排泄微绿色或乳白色粘粪,静伏蚕座,有时吐出大量胃液而死。
Correct identification and diagnosis of silkworm silkworm disease, to take appropriate control measures to sever sericulture disease-free yield is of great significance. Now several infectious silkworm disease identification, diagnosis is as follows. First, the viral silkworm disease (A) midgut type of pus midgut-type heart disease Rural called dry white belly, all have occurred during the silkworm, especially in the summer and autumn more serious disease is one of the main silkworm diseases. The incidence of squamous non-uniform size, sleep irregularities, slow development, silkworm thin, gray, edible mulberry reduce or not eat, often climbed to the outer edge of the silkworm cake peace, fecal grain deformation sticky. The onset of the onset of silkworm is the symptom of contraction, the body skin wrinkle with rust; four, five years after the onset of 2-3 days, the chest was slightly transparent short symptoms; disease was completely stopped eating mulberry, the second and third chest flat flat Wrinkled, swollen abdomen, tail atrophy, excretion of micro-green or milky sticky manure, intravenous vaginalis, occasionally spit a lot of gastric juice and died.