Effects of tobacco volatiles on ovipositing behaviors of two sibling Helicoverpa species and volatile chemical analysis Effects of four pepper varieties on development and fecundity of Helicoverpa assulta (Guenée) Effects of two tobacco species on experimental and natural population dynamics of Helicoverpa assulta Guenée STUDIES ON THE DIAPAUSE CHARACTERISTICS OF ORIENTAL TABACCO BUDWORM A population dynamics model of Helicoverpa assulta (Guenée)(lepidoptera:noctuidae) MASS REARING OF THE ORIENTAL TOBACCO BUDWORM FOR STERILE INSECT TECHNIQUE PROGRAMS Niches of Spodoptera litura (Fabricius) and Helicoverpa assulta (Guenée) in tobacco plants