|Title:||檬果薊馬類發生消長與為害調查及其防治試驗||Other Titles:||Seasonal Occurrence of and Injury Caused by the Thrips and Their Control on Mangoes||Authors:||李錫山
|Keywords:||樣果;腹鈎薊馬;姬黃薊馬;花薊馬;套袋防治法;發生消長;降雨量;mango, Rhipiphorothrips cruentatus Hood;Scirtothrips dorsalis Hood and Thrips hawaiiensis Morgan;scar;paper-bag wrapping;seasonal occurrence;precipitation||Issue Date:||Aug-1982||Publisher:||植病保護學會||Journal Volume:||24||Journal Issue:||3||Start page/Pages:||179-187||Source:||植物保護學會會刊||Abstract:||
在臺灣為害檬果之薊馬，經調查結果有腹鈎薊馬，RhiPIPhorothrips cruentatus Hood，姬黃薊馬，Scirtothrips dorsalis Hood，及花薊馬，Thrips hawaiiensis
Three species of thrip, Rhipiphorothrips cruentatus Hood, Scirtothrips dorsdlis Hood and Thrips hawaiiensis (Morgan), were recorded as the insect pests on mangoes in Taiwan. They injured the mango by puncturing and sucking sap from the epidermis of the leaves and fruits. The affected portions became darkly stained or had scars on the surface of fruits, and the leaves of the growing tips became blackened, curled, and finally dropped. In the cases of the worst, the plants were almost defoliated.
R. cruentatus excreted a reddish fluid on the plants or the surface of the fruits which, after drying, became rust-brown to black. Fruit growth was also retarded, and the punctures served as sources of entry for fungal attack. As a result, the market value of the infested fruits were greatly reduced.
S. dorsalis occurred numerously the year round at the two investigated localities, while R. cruentatus occurred more abundantly at Fengshan than at Yuching area during the growing stage of mangoes. The T. hawaiiensis occurred in blooming stage only. Population density of the R. cruentatus and S. dorsalis was inversely related to the precipitation. Besides damaging on the young leaves or buds, S. dorsalis and T. hawaiiensis also congregate in the flowers during the blooming stage.
Stains or scars of the mango fruits were examined during the mature green stage and the affected fruits were about 36 and 40% at Fengshan and Yuching, respectively. These were closely correlated to the population of S. dorsalis at the two localities. R. cruentatus was rarely found at Yuching area during 1979~80, indicating that the scars on the mango fruits were mainly caused by S. dorsalis rather than by R. cruentatus in Taiwan.
Damage could be prevented by applying insecticides and fungicides before full blooming and then wrapping paraffin paper bags on the whole cluster brfore the size of a fruit was about 1cm in diameter.
|Appears in Collections:||植物保護系|
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