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White Pine Weevil Attack in Large White Pines in Maryland
Harman, D.M. (1971). White Pine Weevil Attack in Large White Pines in Maryland. An. Entomol. Soc. Am. 64(6): 1460-1462
In: Annals of the Entomological Society of America. Entomological Society of America: College Park, Md.. ISSN 0013-8746, more
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  • Harman, D.M.

    Several workers have discussed attack by the white pine weevil, Pissodes strobi (Peck), in large white pines. Graham (1918) stated that attack by the weevil reaches a peak when the white pines are 15 years old and decreases thereafter, finally ceasing when the trees are 25-30 years old. Plummer and Pillsbury (1929) also felt that attack gradually declines as the trees approach maturity, but added, “It is surprising to note the number of trees 30 or more feet in height showing recent weevil injuries. The height of the older trees makes the injury less noticeable and has led to the general belief that trees over 30 years of age are rarely attacked.” Ostrander (1957) and Connola and Wixson (1963) studied weevil attack in relation to tree height by assessing defects caused by white pine weevil attack on 5-ft bole sections along tree stems. Ostrander reported that weevil attack in trees over 60 ft tall was as great as for trees 10-20 ft tall, and he doubted the common belief that weevil attacks become less frequent as the host tree grows larger. However, Connola and Wixson found that weevil attacks were inversely correlated to tree height. In their studies, weevil attacks were most numerous at 15-20 ft and decreased thereafter to very low numbers at 50 ft.

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