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Title: Seasonal Shoot-Feeding By Tomicus Piniperda (Coleoptera: Scolytidae) In Michigan

Author: Haack, Robert A.; Lawrence, Robert K.; Heaton, George C.;

Date: 2000

Source: THe Great Lakes Entomologist. Vol. 33 no. 1.:p. 1-8. (2000)

Publication Series: Scientific Journal (JRNL)

Description: Seasonal shoot-feeding by Tomicus piniperda (L.) was monitored at 2-week intervals on 15 Scotch pine, Pinus sylvestris L., trees from 8 April through 16 November 1994 in southern Michigan. All shoots that showed evidence of T. piniperda attack were removed every two weeks. In 1994, initial spring flight of T. piniperda began on 22 March. At least two live T. piniperda adults were found on the 15 trees on each sampling date from 8 April through 1 November 1994. In addition, at least one freshly attacked, beetlefree shoot was found on each sampling date except for 1 November. The greatest numbers of newly attacked shoots, with or without adults present, were found from mid-June through mid-August. All adults found in April and May were likely parent adults, while those from June onward were primarily brood adults. Therefore, at all times of the year, live T. piniperda adults can be found on live pine trees, either feeding in the shoots or overwintering at the base of the trunk. Implications of these findings are provided in light of the US federal quarantine on T. piniperda.

Keywords: T. piniperda, Tomicu piniperda, Pinus sylvestris, southern Michigan, shoot-feeding

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Haack, Robert A.; Lawrence, Robert K.; Heaton, George C. 2000. Seasonal Shoot-Feeding By Tomicus Piniperda (Coleoptera: Scolytidae) In Michigan. THe Great Lakes Entomologist. Vol. 33 no. 1.:p. 1-8. (2000)

 


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