中国大白菜上几种害虫的防治对于减轻田间软腐病发生的效果

 1926至1939年之间,Leach^6,7,8],Johnson^5],及Bonde^1,2]等曾證明幾種昆蟲與軟腐病細菌間的密切關係,因此認為防治田間昆蟲的活動將減少軟腐病細菌傳播的機會而收到減輕病情的效果。

EFFECT OF INSECT CONTROL ON THE DEVELOPMENT OF SOFT ROT OF CHINESE CABBAGE IN THE FIELD

Field survey on the epiphytotics of the soft rot (Erwinia aroideae and E.carotovora) of the Chinese cabbage (Brassica pekinensis Rupr.) in the North and Northeast China revealed that some insect pests such as flea beetle,leaf beetle and larva of cabbage butterfly were intimately correlated with the disease.Isola-tions made from the mouth parts and intestines of the insects,namely Phyllotreta vittata Fabr.,Eurydema pulchrum Westwood,Pieris rapae Linn, (larva) and Colaphellus bowringi Baly (larva),indicated that the soft rot organisms were more frequently found on the mouth parts of the insects and less frequen'ly in their intestines.Artificially infested adults of the flea beetle and larvae of the leaf beatle fed on potted Chinese cabbage plants were able to transmit the disease and acted as effective inoculators when conditions were suitable.