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.

scholarly journals Mortality of the white pine weevil associated with silvicultural practices in jack pine plantations

1996 ◽  
Vol 72 (4) ◽  
pp. 388-392 ◽  
Author(s):  
M. Isabel Bellocq ◽  
Sandy M. Smith
Keyword(s):  
Small Mammal ◽  
Woody Debris ◽  
Abiotic Factors ◽  
Jack Pine ◽  
White Pine ◽  
Pissodes Strobi ◽  
Pine Weevil ◽  
Competing Vegetation ◽  
Overwintering Mortality ◽  
White Pine Weevil

A synthesis of white pine weevil (Pissodes strobi Peck) mortality caused by predation (insects, birds, and mammalian predators), crowding of pupae, and abiotic factors, acting under different stand conditions given by the type of reforestation, depth of the duff, distance from woody debris, and presence of competing vegetation is presented, based on a four-year study conducted in northeastern Ontario. The type of reforestation (planted vs. aerial seeding) did not influence mortality to immature weevils in the leaders from either bird predation, insect predators and parasitoids or crowding of pupae, but 16% more weevils died during winter in a planted than in a seeded stand suggesting that there was an effect of site condition or small mammal predation on overwintering adults in the duff. Over all conditions, overwintering mortality averaged 76-92% with small mammal predation representing about 5-13%. Site conditions which augmented small mammal populations and predation, such as proximity to woody debris and presence of competing vegetation, had no effect on overwintering mortality of the weevils. The most important factor influencing overwintering mortality was likely the depth of duff where an inverse relationship was observed between mortality and depth. Forest managers should address conditions of duff depth and small mammal predation to increase the already significant overwintering mortality of adult weevils in young jack pine stands. Key words: Pissodes strobi, silvicultural treatments, planted and seeded stands, competing vegetation, duff layers, small mammal predation, overwintering mortality

Feeding, oviposition and emergence of the white pine weevil (Pissodes strobi (Peck)) under a pioneer broad-leaved forest canopy

2001 ◽  
Vol 77 (5) ◽  
pp. 885-892 ◽  
Author(s):  
Robert Lavallée ◽  
Gaëtan Daoust ◽  
Yves Mauffette ◽  
Geneviève Audet ◽  
Charles Coulombe
Keyword(s):  
Forest Canopy ◽  
Forest Cover ◽  
Basal Area ◽  
Tree Height ◽  
White Pine ◽  
Pissodes Strobi ◽  
Pine Weevil ◽  
Survival Index ◽  
Broad Leaved Forest ◽  
White Pine Weevil

The white pine weevil's (Pissodes strobi Peck) feeding, oviposition and emergence were studied in a 12-year-old (1998) white pine (Pinus strobus L.) progeny test established under a canopy of mature pioneer species in the Outaouais region (Notre-Dame-du-Laus, Québec, Canada). The basal area of the overstory centred on 63 white pines was used as an indicator of forest cover. With overstory basal area ranging from 0 to 16 m2/ha, some white pine weevil performance parameters such as feeding and oviposition were significantly correlated with forest cover. However, others like the number of pupal chambers, emergence holes, partial survival index (emergence holes/chip-cocoon punctures) and total survival index (oviposition punctures/emergence holes) were not. Results showed that with an increase of forest cover, tree height was not affected but tree bole diameter was reduced. No relation was observed between leader diameter and the number of oviposition punctures. Even under a canopy, natural enemies (Lonchaea corticis Taylor and hymenoptera parasitoids) were also noted to reduce larval and pupal white pine weevil populations. Key words: white pine weevil, white pine, undercover plantation, natural biological control, oviposition, feeding, emerging population, overstory basal area

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

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.

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