Life Tables of the White Pine Weevil, Pissodes strobi , 1 in Central Maine 2

1982 ◽  
Vol 11 (3) ◽  
pp. 555-564 ◽  
Author(s):  
Wayne N. Dixon ◽  
Mark W. Houseweart
Keyword(s):  
Life Tables ◽  
White Pine ◽  
Pissodes Strobi ◽  
Pine Weevil ◽  
White Pine Weevil

scholarly journals Genetically based resistance to the white pine weevil in jack pine and eastern white pine

2010 ◽  
Vol 86 (6) ◽  
pp. 775-779 ◽  
Author(s):  
Alice Verrez ◽  
Dan Quiring ◽  
Thibaut Leinekugel Le Cocq ◽  
Greg Adams ◽  
Yill Sung Park
Keyword(s):  
Pinus Banksiana ◽  
Significant Proportion ◽  
Tree Height ◽  
Jack Pine ◽  
White Pine ◽  
Pissodes Strobi ◽  
Pine Weevil ◽  
Tree Resistance ◽  
Trade Offs ◽  
White Pine Weevil

White pine weevil (Pissodes strobi Peck) damage was evaluated in one white pine (Pinus strobus L.) and four jack pine(Pinus banksiana Lamb) half-sib family test sites to determine the role of tree genotype in resistance to the weevil. Halfsibfamily explained a significant proportion of the variation in weevil attack at all sites. Estimates of family (0.16-0.54)and individual (0.09-0.24) heritabilities of jack pine resistance to white pine weevil were moderate. Estimates of family(0.37) and individual (0.22) heritability of resistance of white pine to the weevil were also moderate when the percentageof test trees damaged by the weevil was relatively low, but were insignificant four years later when more than three-quartersof trees were damaged. Significant positive correlations between mean tree height and mean incidence of trees damagedby the weevil were observed for four of seven site-years but relationships were weak, suggesting that any cost, withrespect to height growth, to breeding weevil resistant trees may be small.Key words: Pinus, Pissodes strobi, trade-offs, tree improvement, tree resistance, white pine weevil.

Relationship between cortical resin acids and resistance of Sitka spruce to the white pine weevil

1996 ◽  
Vol 74 (4) ◽  
pp. 599-606 ◽  
Author(s):  
Elizabeth S. Tomlin ◽  
John H. Borden ◽  
Harold D. Pierce Jr.
Keyword(s):  
Discriminant Analysis ◽  
Resin Acid ◽  
Sitka Spruce ◽  
Canonical Discriminant Analysis ◽  
Picea Sitchensis ◽  
Resin Acids ◽  
White Pine ◽  
Pissodes Strobi ◽  
Pine Weevil ◽  
White Pine Weevil

Cortical resin acids were analyzed both quantitatively and qualitatively among 10 provenances and 11 genotypes of Sitka spruce, Picea sitchensis Bong (Carr.), putatively resistant to the white pine weevil, Pissodes strobi (Peck), and compared with susceptible trees. Trees in 5 of the 11 resistant genotypes had significantly greater amounts of cortical resin acid than susceptible trees. Of seven individual acids analyzed, pimaric, isopimaric, levopimaric, dehydroabietic, abietic, and neoabietic acid, but not palustric acid, were found in significantly greater amounts in trees from resistant than susceptible provenances. Eighteen percent of the variation in resin acid content could be accounted for by variation in the capacity of cortical resin ducts, indicating that the other 82% of variation is a result of differences in resin acid concentration in the resin. Trees with very high resin acid levels may have a greater capacity for resinosis than susceptible trees, may deter feeding, or may produce resin that is toxic to eggs and larvae. Canonical discriminant analysis revealed that several resistant clones, particularly two from the Kitwanga provenance, could be distinguished from others on the basis of their resin acid profiles. Because it separated trees on the basis of genotype, but not according to degree of resistance, canonical discriminant analysis may be more useful in "chemotyping" trees than in screening for resistance. Keywords: Picea, cortex, resin acids, Pissodes strobi, resistance.

PREDATION BY LONCHAEA CORTICIS (DIPTERA: LONCHAEIDAE) ON THE WHITE PINE WEEVIL, PISSODES STROBI (COLEOPTERA: CURCULIONIDAE)

1980 ◽  
Vol 112 (12) ◽  
pp. 1259-1270 ◽  
Author(s):  
R. I. Alfaro ◽  
J. H. Borden
Keyword(s):  
Sitka Spruce ◽  
Predatory Behavior ◽  
Picea Sitchensis ◽  
White Pine ◽  
Granary Weevil ◽  
Pissodes Strobi ◽  
Pine Weevil ◽  
Temporal Sampling ◽  
Highly Correlated ◽  
White Pine Weevil

AbstractThe predatory behavior of Lonchaea corticis Taylor on the white pine weevil, Pissodes strobi Peck, in Sitka spruce, Picea sitchensis (Bong.) Carr., was studied by temporal sampling and dissection of terminal leaders, and by laboratory experiments. L. corticis oviposition occurred when mining P. strobi larvae were consolidating the feeding ring, an event that segregates the weevil larvae into healthy front-feeders and weak, starving "followers." The number of L. corticis within a Sitka spruce terminal was highly correlated with the number of weak and dying P. strobi larvae, but not with healthy larvae.L. corticis larvae experimentally deprived of dead P. strobi larvae, behaved as an effective predator, consuming both weak P. strobi larvae and healthy pupae, but apparently not healthy larvae. The transition of L. corticis from second to third instar appeared to occur only after sufficient weevils had been consumed. When an excess of prey was present, L. corticis larvae consumed a mean of 2.9 P. strobi pupae over their entire life cycle. In choice experiments, L. corticis larvae searched for and located mining P. strobi larvae, and fed preferentially on P. strobi pupae rather than granary weevil pupae, Sitophilus granarius L. Under certain circumstances, L. corticis could be an important regulatory agent of P. strobi populations.

Control of white pine weevil, Pissodes strobi, on Sitka spruce using implants containing systemic insecticide

1993 ◽  
Vol 69 (5) ◽  
pp. 600-603 ◽  
Author(s):  
R. G. Fraser ◽  
D. G. Heppner
Keyword(s):  
Sitka Spruce ◽  
Picea Sitchensis ◽  
Systemic Insecticide ◽  
Treatment Combination ◽  
White Pine ◽  
Pissodes Strobi ◽  
Pine Weevil ◽  
The Cost ◽  
Alternative Delivery ◽  
White Pine Weevil

Young Sitka spruce, Picea sitchensis (Bong.) Carr., trees in three stands were treated with either Gelcaps® containing oxydemeton-methyl or Acecaps® containing acephate to test their effectiveness in protecting trees from white pine weevil, Pissodes strobi (Peck) attack. All treatments were applied in late March 1989. Weevil attack was recorded in early September 1989, 1990 and 1991. Attack was significantly reduced (P < 0.01) in all but one stand/treatment combination in 1989. Gelcaps provided significant protection (P < 0.01) in two of three stands after two years. Stem implants containing systemic insecticide can protect young Sitka spruce from weevil attack. Alternative delivery systems, such as the Ezect® lance, should be evaluated as they may improve the speed and lower the cost of operational treatments. Keywords: acephate, oxydemeton-methyl, stem implants, systemic insecticides, white pine weevil

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