Influence of Temperature and Relative Humidity on the Life-span of Adults of the Swaine Jack-pine Sawfly, Neodiprion swainei Middleton (Hymenoptera: Diprionidae)

Abstract

Can. Ent. 98: 789-791 (1966) The life-span of Swaine jack-~ine sawfly adults was studied under various constant and alternating temperatures and at four different values of relative humidity. Temperature significantly influenced the life-span of both sexes according to a non-linear equation, and relative humidity according to a linear regression. The influence of temperature varied with relative humidity in the case of males but not in the case of females. The life-span of both sexes was sh,orter at alternating temperatures than at constant temperatures. AbstractCan. Ent. 98: 794-798 (1966) The temporat pattern of emergence of Anax junius Drury was studied by making standardized exuvial collections in a farm pond near Montreal. Supports available to emerging larvae were restricted artificially in order to standardize the collecting area. Emergence lasted for 30 days (29 July to 27 August 1965), the peak lying between days 10 and 15; A . junius thus behaved as a "summer species" (sensu Corbet 1954). The emerging population comprised about 48% males.N o adults were seen flying over the pond except during the maiden flight.

Seasonal Changes in Adult Longevity and Pupal Weight of the Nantucket Pine Tip Moth (Lepidoptera: Tortricidae) with Implications for Interpreting Pheromone Trap Catch

“…Moscardi et al (1981) showed that adult female longevity of the velvetbean caterpillar, Anticarsia gemmatalis Hü bner (Lepidoptera: Noctuidae), decreased with increasing temperatures. A similar trend was demonstrated for the New Zealand ßower thrips Thrips obscuratus (Crawford) (Thysanoptera: Thripidae) (Teulon and Penman 1991) and the Swain jack pine sawßy, Neodiprion swainei Middleton (Hymenoptera: Diprionidae) (Pilon 1966). However, in none of these studies were the life spans of different generations of the same multivoltine insect compared over a particular season.…”

“…Butler and Foster (1979) showed that adults of the pink bollworm, Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae), held at constant temperatures lived longer than at comparable, ßuctuating temperatures. Pilon (1966) also demonstrated shorter life span under ßuctuating than constant temperatures for both sexes of the Swain jack pine sawßy. For the Nantucket pine tip moth, life spans in the Þeld experiment closely matched those in the laboratory experiment under similar average temperatures (Figs.…”

The Nantucket pine tip moth: old problems, new research. Proceedings of an informal conference, the Entomological Society of America, annual meeting. 1999 December 12-16

“…Butler and Foster (1979) showed that adults of the pink bollworm, Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae), held at constant temperatures lived longer than at comparable, fluctuating temperatures. Pilon (1966) also demonstrated shorter life span under fluctuating than constant temperatures for both sexes of the Swain jack pine sawfly. For the Nantucket pine tip moth, life spans in the field experiment closely matched those in the laboratory experiment under similar average temperatures (figs.…”