Author： GOLDMAN SUZANNE E. FRANKLIN RUDOLPH T.
Publisher： Entomological Society of America
ISSN： 1938-2901
Source： Annals of the Entomological Society of America, Vol.70, Iss.1, 1977-01, pp. : 54-56
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Abstract
The life cycle, feeding behavior, and mortality of the larvae of Dendroctonus frontalis Zimmerman (Coleoptera: Scolytidae) were studied under natural conditions in the Georgia Piedmont during the summer of 1975. Four larval stadia had an average developmental time of 5 days each. Instars 1 and 2 make a larval mine, whereas instars 3 and 4 begin and complete a feeding chamber and move into the outer bark to pupate. Larvae mining in perithecial, blue-stained phloem make significantly longer mines than larvae mining in unstained phloem (8.5 mm and 5.2 mm, respectively). For larvae in the lower portion of the bole (2–4 m) a 70.7% mortality occurred between the egg and 1st and 2nd instars, and a 90.4% mortality occurred between the egg and 3rd and 4th instars.
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