Abstract This study was designed to determine if the within-tree distributions of various southern pine beetle (SPB) life stages were similar for declining populations infesting loblolly and shortleaf pine in North Carolina. A secondary objective was to compare the...
1971-1980 Publications
Survival of Declining Dendroctonus frontalis Populations During a Severe and Nonsevere Winter
Abstract Declining infestations of Dendroctonus frontalis were studied in terms of within-tree, within-spot, and within-area survival between a severe and mild winter. While brood survival differed dramatically between the 2 winters, the net effect on population...
Redescription and Life History of Contortylenchus brevicomi, a Parasite of the Southern Pine Beetle Dendroctonus frontalis
Abstract Larval and adult life stages are described for Contortylenchus brevicomi (Massey) Riihm parasitizing a Mississippi population of Dendroctonus frontalis, the southern pine beetle. Fourth-stage larvae and free-living adult females of this species are identified...
Comparison of Methods for Estimation of Attacking Adult Populations of Dendroctonus frontalis
Abstract Attacking adult populations of the southern pine beetle in loblolly pine, Pinus taeda L., were measured by using 3 estimation procedures; X-ray analysis, bark dissection to locate attacking adults, and bark dissection to locate the entry point of each attack....
Mutualism Between Dendrolaelaps neodisetus and Dendroctonus frontalis
Abstract The relationship between the southern pine beetle, Dendroctonus frontalis Zimm., and one of its common phoretic mites, Dendrolaelaps neodisetus (Hurlbutt) is probably mutualistic. Beetles harboring D. neodisetus have less endoparasitism by the nematode,...
Fatty-Acid Composition of Dendroctonus frontalis at Various Developmental Stages
Abstract Fatty acids of the neutral lipid (NL), and phospholipid (PL) fractions of the southern pine beetle, Dendroctonus frontalis Zimmermann, were examined at 6 developmental stages: egg, inner-bark larval, outer-bark larval, pupal, emerging adult, and attacking...
Seasonal Variations in Fat Content and Size of the Southern Pine Beetle in East Texas
Abstract Average fat content and pronotal width of newly emerged adults of Dendroctonus frontalis Zimmerman varied with season in east Texas. Fat content of beetles Beetles were smallest during the months of July, August and September. Females, in general, were larger...
FINE STRUCTURE OF THE PROTHORACIC MYCANGIUM, A CHAMBER FOR THE CULTURE OF SYMBIOTIC FUNGI, IN THE SOUTHERN PINE BEETLE, DENDROCTONUS FRONTALIS
Abstract The ultrastructure of the prothoracic mycangium of female Dendroctonus frontalis is examined. The mycangium consists of a cuticular invagination within which symbiotic fungi are cultured by the pine beetle and transported to new host trees. Secretions from...
Standardized Within-Tree Sampling for Populations of Dendroctonus frontalis
Abstract The objective of this study was to evaluate the applicability of procedures for sampling and estimating within-tree populations of Dendroctonus frontalis in North Carolina. The procedures developed under epidemic conditions in Texas were applied to declining...