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DISTRIBUTION, HOST PLANTS AND NATURAL ENEMIES OF CABBAGE BUD-WORM (Hellul a phidilealis (Walker) IN THE CARIBBEAN

Author

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  • Alam, M.M.

Abstract

Hellula phidilealis and other members of this genus usually regarded as the primary pests of crucifers, were observed feeding in pods and terminal shoots of Oleome spinosa, Oleome viscosa, Oleome spp. and Gynandropsis gynandra in greater numbers almost throughout the year, in the Caribbean, Guyana (South America) and Mexico. These studies suggest that Oleome spp. are the main hosts of this genus, and it is only a secondary pest of crucifers. Hellula undalis was reported feedding on C. viscosa in Pakistan (Alam et al. 1961-62). Munroe (1972) also stated that H. phidilealis and H. rogatalis feed on other plant families. The relative abundance of natural enemies of H. phidilealis in Oleome spp. in contrasttotheirpaucity in cruciferous hostsfurthersupportthis hypothesis that H. phidilealis has shifted from Oleome spp. to crucifers. Although many of the parasites recorded from Oleome spp. may not readily switch to H. phidilealison cabbages and cauliflowers, there are a number of other parasites recorded from this an other Hellula spp. on cabbage and cauliflowers, which can be introduced in countries where Hellula is a serious pest on crucifers. ----- Hellula phidilealis et d'autres espèces appartenant à ce genre considéré généralement comme les principaux ravageurs des crucifères, ont été observés s'alimentant en grand nombre et presque toute l'année dans les gousses et les pousses terminales de Oleome spinosa, Oleome viscosa, Oleome spp. et Gynandropsis gynandra dans les Caraïbes, Guyane (Amérique du Sud) et le Mexique. Ces études suggèrent que les Oleome spp. sont l'hôte principal du genre Hellula et que celui-ci est seulement un ravageur secondaire des crucifères. Hellula undalis a été signalé s'alimentant sur C. viscosa au Pakistan, (Alam et al. 1961-62). Munroe (1972) aégalement mentionnéque H.phidilealisetH. rag,afa//ss'alimentaientsurd'autresfamilles de plantes. L'abondance relative des ennemis naturels de H. phidileaiis sur Oleome spp. contrastant avec leur absence sur crucifères et renforce l'hypothèse que H. phidileaiis s'est déplacé des Oleome spp. vers les crucifères. Bien que beaucoup de parasites mentionnés sur Oleome spp. pourraient ne pas facilement passer de H. phidileaiis sur chou et chou-fleur, il existe certains parasites collectés sur cette plante et d'autres proviennent d'Hellula spp.sur chou et chou-fleurs qui pourraient être introduits dans les pays où Hellula est un ravageur important sur crucifères.

Suggested Citation

  • Alam, M.M., 1989. "DISTRIBUTION, HOST PLANTS AND NATURAL ENEMIES OF CABBAGE BUD-WORM (Hellul a phidilealis (Walker) IN THE CARIBBEAN," 25th Annual Meeting, July 1-6, 1989, Gosier, Guadeloupe 259928, Caribbean Food Crops Society.
  • Handle: RePEc:ags:cfcs89:259928
    DOI: 10.22004/ag.econ.259928
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