Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Ecological studies on sweet potato leaf miner (Bedellia ferenodes) II. Studies on the population dynamics of sweet potato leaf miner and its control.

Abstract

Bedellia terenodes Meyr., a pest of sweet potato, could be found throughout the year in Taiwan, but especially in the dry season (November-March). Populations reached a peak in March and were lowest in the rainy season. The summer crop suffered more damage than the autumn one. Populations were higher in the counties of Chang-Hua and Yun-Lin than elsewhere, and were found from sea level to an altitude of 1400 m. Sweet potato varieties with light-green leaves or broad leaf-blades suffered less damage than others. Other food-plants included Ipomoea aquatica, I. obscura and I. palmata. Natural enemies found were Apanteles sp. and Euborellia pallipes (Shir.). Fenitrothion (as 50% Sumithion to 1000 parts water) and methomyl (as 90% Lannate to 1800 parts water) were effective in controlling the leaf-miner.