Field Studies on Stability of the Heliothis Nucleopolyhedrosis Virus at Various Sites Throughout the Cotton Belt 1

Abstract
Sensitivity of insect viruses to sunlight was demonstrated with the noninclusion virus of Panonychus (Gilmore and Munger 1963), the nucleopolyhedrosis viruses (NPV) of Heliothis (Bullock 1967, Allen 1968, Ignoffo and Batzer 1971) and Trichoplusia (Jacques 1968), and the granulosis virus of Pieris (David et al. 1968).