O. Youm et Fe. Gilstrap, POPULATION-DYNAMICS AND PARASITISM OF CONIESTA (= HAIMBACHIA) IGNEFUSALIS, SESAMIA-CALAMISTIS, AND HELIOCHEILUS-ALBIPUNCTELLA IN MILLET MONOCULTURE, Insect science and its application, 14(4), 1993, pp. 419-426
Studies were conducted in Niger in 1986 and 1987 on the population dyn
amics and parasitism of the millet stem borer, Coniesta (=Haimbachia)
ignefusalis (Hampson) (Lepidoptera:Pyralidae), Sesamia calamistis Hamp
son, and the millet head caterpillar, Heliocheilus albipunctella de Jo
annis (Lepidoptera:Noctuidae). Planting dates were assessed for effect
s on population densities of C. ignefusalis and H. albipunctella. Popu
lation densities of C. ignefusalis were not reduced by adjusting mille
t planting dates, but were affected by millet growth stage. Platytelen
omus sp. (Hymenoptera: Scelionidae) was the most common parasite of C.
ignefusalis on millet. Parasitism of C. ignefusalis larvae and pupae
was rare. Sesamia calamistis was a minor pest of millet in Niger, and
was rarely parasitized. Population densities of H. albipunctella were
reduced by delaying millet planting dates. Bracon hebetor (Hymenoptera
: Braconidae) was the most common parasite of H. albipunctella.