A MULTIPLE-COHORT MODEL FOR SIMULATING JACK PINE BUDWORM (LEPIDOPTERA: TORTRICIDAE) DEVELOPMENT UNDER VARIABLE TEMPERATURE CONDITIONS

1989 ◽  
Vol 121 (4-5) ◽  
pp. 373-387 ◽  
Author(s):  
T.J. Lysyk
Keyword(s):  
Variable Temperature ◽  
Model Performance ◽  
Jack Pine ◽  
Rate Equations ◽  
Daily Maximum ◽  
Temperature Conditions ◽  
Northwestern Ontario ◽  
Jack Pine Budworm ◽  
Choristoneura Pinus Pinus ◽  
Phenology Model

AbstractA phenology model for jack pine budworm, Choristoneura pinus pinus Freeman, is presented. Linear and nonlinear relationships between temperature and the development of overwintering larvae, instars 2–7, and pupae are determined, as is variation in the development of each instar. The model uses as input daily maximum and minimum temperatures corrected for the effects of bark and bud microclimate and simulates the number of insects in each instar on a given calendar date. Variation in development of all stages is included. Simulations matched observed data well for north-central and northwestern Ontario in 1986, but overestimated time of development for northwestern Ontario in 1987. Simulations under low, medium, and high temperature conditions revealed that a nonlinear equation for rate of development was necessary for simulating emergence whereas linear rate equations were adequate for simulating development of the feeding instars. The combined effect of bud and bark microclimate on model performance was equal to that which resulted from the use of nonlinear developmental equations.

PARASITISM IN SUSTAINED AND COLLAPSING POPULATIONS OF THE JACK PINE BUDWORM, CHORISTONEURA PINUS PINUS FREE. (LEPIDOPTERA: TORTRICIDAE), IN ONTARIO, 1985–1987

1991 ◽  
Vol 123 (5) ◽  
pp. 1065-1075 ◽  
Author(s):  
V.G. Nealis
Keyword(s):  
Population Studies ◽  
Spruce Budworm ◽  
Jack Pine ◽  
Larval Stages ◽  
Northwestern Ontario ◽  
Choristoneura Pinus ◽  
Jack Pine Budworm ◽  
Choristoneura Pinus Pinus

AbstractSixteen species of parasitoids were found attacking outbreak and collapsing populations of the jack pine budworm, Choristoneura pinus pinus Free. (Lepidoptera: Tortricidae), in several plots in northeastern and northwestern Ontario. The patterns of parasitism were similar among widely separated plots with only a few species consistently dominating the parasitoid fauna. The greatest difference in the pattern of parasitism was between sustained and collapsing infestations. Collapsing populations of jack pine bud-worm were associated with relatively high levels of parasitism by Meteorus trachynotus Vier. (Hymenoptera: Braconidae) and Lypha setifacies (West.) (Diptera: Tachinidae) which attacked the late larval stages of the budworm. The results are discussed in comparison with other jack pine budworm studies and with spruce budworm population studies.

The Effect of Jack-pine Staminate Flowers on the Size of Larvae of the Jack-pine Budworm, Choristoneura sp.

1950 ◽  
Vol 82 (2) ◽  
pp. 34-43 ◽  
Author(s):  
R. R. Lejeune
Keyword(s):  
Jack Pine ◽  
New Variety ◽  
Early Stages ◽  
Northwestern Ontario ◽  
Jack Pine Budworm

The jack-pine budworm, Ohoristoneura sp., was first recorded by Graham (5, 6) as a new variety or race on jack pine. Subsequent studies by Graham (6 showed that in the early stages of their development the larvae of this insect prefer jack-pine staminate flowers as a habitat. Population records from Manitoba and northwestern Ontario indicate that infestations of the jack-pine budworm are invariably associated with an abundance of staminate flowers.

Association of within-tree jack pine budworm feeding patterns with canopy level and within-needle variation of water, nutrient, and monoterpene concentrations

1998 ◽  
Vol 28 (2) ◽  
pp. 228-233 ◽  
Author(s):  
Kimberly F Wallin ◽  
Kenneth F Raffa
Keyword(s):  
Pinus Banksiana ◽  
Jack Pine ◽  
Larval Feeding ◽  
Feeding Patterns ◽  
Choristoneura Pinus ◽  
Jack Pine Budworm ◽  
Choristoneura Pinus Pinus ◽  
Zinc Levels ◽  
Calcium Iron ◽  
Relative Differences

The possibility that uneven within-tree feeding patterns by jack pine budworm (Choristoneura pinus pinus Freeman) larvae could be related to underlying variation in host jack pine (Pinus banksiana Lamb.) foliar water, nutrient, and monoterpene contents was considered. Choristoneura pinus pinus feeds disproportionately in the upper portion of the canopy and almost exclusively on the basal portions of needles. Within needles, the distribution of water, several nutrients, and monoterpenes varied significantly between the distal and basal sections. Water, nitrogen, sulfur, manganese, and zinc levels occurred in higher concentrations in the distal section of the needle, which would not be predicted based on C. pinus pinus feeding patterns. Phosphorus, potassium, calcium, iron, and copper were significantly higher in the basal section. Although the latter differences might be predicted based on C. pinus pinus feeding patterns, they were not strong (ranging from 7.8% to 36.4% relative differences, as compared with 10.7%-50.0% relative differences in the former group). By contrast, concentrations of foliar monoterpenes were more strongly associated with known feeding patterns of C. pinus pinus. These relative differences ranged from myrcene (26.8%) to limonene (44.79%). Thus, foliar differences affecting within-needle feeding selection appear more associated with allelochemicals than nutrients or water. In contrast with the within-needle associations between larval feeding and foliar chemistry, no associations between upper and lower canopy foliage were observed. Water, nutrients, and monoterpenes were evenly distributed across the upper and lower canopy locations. Thus, differential feeding between canopy locations cannot be explained by foliar constituents. Rather, it is more likely explained by other environmental factors, such as proximity to and density of reproductive and vegetative shoots.

scholarly journals The ecological interaction of the mountain pine beetle and jack pine budworm in the boreal forest

2010 ◽  
Vol 86 (6) ◽  
pp. 766-774 ◽  
Author(s):  
Lindsay J. Colgan ◽  
Nadir Erbilgin
Keyword(s):  
Climate Change ◽  
Boreal Forest ◽  
Mountain Pine Beetle ◽  
Dendroctonus Ponderosae ◽  
Jack Pine ◽  
Mountain Pine ◽  
Choristoneura Pinus ◽  
Pine Beetle ◽  
Jack Pine Budworm ◽  
Choristoneura Pinus Pinus

As climate change facilitates the range and host expansion of insect species into new ecosystems, the development of newstrategies for managing and preventing biological invasion is receiving considerable interest. In recent years, the range ofthe mountain pine beetle (Dendroctonus ponderosae Hopkins) has expanded from lodgepole pine-dominated forests eastof the Rocky Mountains into lodgepole x jack pine hybrid forest of western Alberta, and may soon invade jack pine forestsof the boreal. Our understanding of factors contributing colonization of jack pine by mountain pine beetle is far fromcomplete and several factors may limit its spread in these forests, including tree resistance and competitors. Among these,the jack pine budworm (Choristoneura pinus pinus Freeman) is one of the most important insect enemies of jack pine andan outbreak defoliator that potentially weakens jack pine trees, which may make them more susceptible to MPB attacks.To develop effective management strategies in the face of the short-run impacts of climate change, we need an in-depthunderstanding of factors influencing establishment and survival of the beetle in jack pine forests.Key words: Choristoneura pinus pinus, Dendroctonus ponderosae, jack pine, range expansion, invasion biology, climatechange in the boreal forest, conifer-mediated interactions, tree induced defences, tripartite interactions

Identification of sex pheromone components of jack pine budworm,Choristoneura pinus pinus freeman

1985 ◽  
Vol 11 (2) ◽  
pp. 159-167 ◽  
Author(s):  
P. J. Silk ◽  
L. P. S. Kuenen ◽  
S. H. Tan ◽  
W. L. Roelofs ◽  
C. J. Sanders ◽  
...  
Keyword(s):  
Sex Pheromone ◽  
Jack Pine ◽  
Sex Pheromone Components ◽  
Choristoneura Pinus ◽  
Jack Pine Budworm ◽  
Pheromone Components ◽  
Choristoneura Pinus Pinus
Sign in / Sign up

Export Citation Format

Share Document