Silvicultural management of Hypsipyla species
Existing evidence for successful silvicultural control of Hypsipyla spp. is conflicting and to a large extent anecdotal. Levels of attack have been correlated with factors such as shade, planting density, species mixtures, site characteristics, etc. These factors have often been poorly defined and are usually interdependent. The actual mechanisms that determine whether or not Hypsipyla spp. adversely affects plants are defined as host-finding, host suitability, host recovery and natural enemies. These mechanisms can be influenced by the silvicultural techniques applied to a stand. Success of silvicultural techniques can usually be attributed to more than one mechanism and it is difficult to assess which is the most important for minimising the impact of Hypsipyla as these analytical data are lacking. This highlights the need for further research on silvicultural methods for controlling Hypsipyla spp. However, several silvicultural techniques that are briefly described show promise for improving the performance of future plantations. Examples of silvicultural control are reviewed with reference to these mechanisms.
Hauxwell, C.; Mayhew, J.; Newton, A. Silvicultural management of Hypsipyla species. In: ACIAR Proceedings No. 97: Hypsipyla shoot borers in Meliaceae. Proceedings of an International Workshop held at Kandy, Sri Lanka, 20-23 August 1996. (1996) 151-163. ISBN 0-642-45621-6