Wd. Woodson et Jj. Jackson, DEVELOPMENTAL RATE AS A FUNCTION OF TEMPERATURE IN NORTHERN CORN-ROOTWORM (COLEOPTERA, CHRYSOMELIDAE), Annals of the Entomological Society of America, 89(2), 1996, pp. 226-230
Development of immature northern corn rootworm, Diabrotica barberi Smi
th & Lawrence, was studied at 7 constant temperatures ranging from 15
to 31.5 degrees C. Development occurred at all temperatures, however,
survival was lowest at 15 and 31.5 degrees C for both males and female
s. The proportion of time spent in each life stage from hatch to adult
emergence was independent of sex and approximate to 15% for Ist insta
rs, 18% for 2nd instars, 41% for 3rd instars, and 25% for the pupal st
age. Developmental times, from hatch to adult emergence, between males
and females were substantially different. A developmental threshold o
f 10.2 degrees C was estimated for development from hatch to adult eme
rgence. Development from hatch to adult emergence was fastest al 30 de
grees C, taking approximate to 28 d, and slowest at 15 degrees C takin
g 98 d.