RESPONSE OF IPS GRANDICOLLIS (EICHHOFF) ADULTS (COLEOPTERA;SCOLYTIDAE) TO SITES IN BARK INITIATED BY OTHERS OF THE SAME SPECIES |
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| Authors: | Jayanthi P. Witanachchi |
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| Affiliation: | Waite Agricultural Research Institute, P. M. B. No. 1, Glen Osmond, S. A. 5064. |
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| Abstract: | b
Dispersing males and females of Ips grandicollis , whether mated or virgin, initiated galleries on experimental logs held in a naturally infested P. radiata plantation. A few females initiated galleries despite the presence of adjacent male-initiated galleries. Males responded to logs bearing females by entering 41% of the female-initiated galleries. The pattern of entry of these males differed depending on whether the entrance to the female-initiated gallery was blocked by frass or not. The findings of this study has led to interesting speculations about the behaviour and biology of this species. |
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