Effects of Host Age, Virus Dosage, and Temperature on the Infectivity of a Nucleopolyhedrosis Virus Against Velvetbean Caterpillar, Anticarsia gemmatalis , Larvae 1
- 1 February 1980
- journal article
- research article
- Published by Oxford University Press (OUP) in Environmental Entomology
- Vol. 9 (1) , 59-61
- https://doi.org/10.1093/ee/9.1.59
Abstract
The inter-instar susceptibility of the velvetbean caterpillar to a nucleopolyhedrosis virus was quantitated. Analysis of response curves revealed a 930-fold range in susceptibility between the most sensitive and the most resistent individuals in these larval populations. The LD 50 values for 2nd, 3rd, 4th, and 5th instars were 103, 432, 682, and 4100 polyhedra/larva, respectively. At 26.7°C the virus replicated efficiently in all larval instars. Virus replication was slower at lower temperatures (15.6°C, 21.1°C) but the cumulative virus mortality at these these temperatures were similar fo that achieved at 26.7°C. Incubation at higher temperatures (32.2°C), however, caused a 30–50% less virus mortality than occurred at lower temperatures.This publication has 1 reference indexed in Scilit:
- A Nuclear Polyhedrosis Virus of Anticarsia gemmatalis: I. Ultrastructure, Replication, and PathogenicityThe Florida Entomologist, 1977