TEMPERATURE AND PHOTOPERIOD EFFECTS ON THE IMMATURE STAGES AND ADULTS OFNEODIPRION SWAINEI(HYMENOPTERA: DIPRIONIDAE)

Abstract

Can. Ent. 103: 1705Ent. 103: -1715Ent. 103: (1971 Larvae of Neodiprion swainei Midd. were reared to the adult stage under controlled conditions of temperature and photoperiod. The effects of temperature are particularly evident during the larval stage, cocoon spinning, and adult emergence and are also observed through variation in cocoon weight and fecundity. Feeding, fecundity, and diapause are directly related to photoperiod. Larvae eat more when the photophase is long, an effect that is detrimental to the organism because there is a parallel loss of energy expressed in the number of day-degrees required to complete development. RBsumBLa temptrature a des effets marquts sur le dkveloppement larvaire, le tissage des cocons, l'tmergence des adultes, le poids des cocons et la fkconditt de Neodiprion swainei Midd. Les variations de photopkriode semblent Etre en rapport direct avec l'activitk nutritive et la fkconditk. Les larves se noumssent davantage lorsque la photophase est longue. Ce phtnomene est dtsavantageux pour l'organisme car il implique qu'il y a une perte parallele en Cnergie qui se traduit par un plus grand nombre de degrb-jours ntcessaires au dkveloppement.

Influence of soil moisture on the mortality, fecundity and diapause of the pine processionary moth (Thaumetopoea pityocampa Schiff.)

“…Percentage of the number of the moths emerged during the second flying period (1985) in comparison with the moths emerged during the first period (1984) In contrast with the number of emerged moths and pupal mortality, there was not ascertained any influence of soil moisture upon the number of eggs counted in the ovaries of female moths of T. pityocumpu, because the number of eggs is mainly influenced by the factors affecting the insect during its feeding stage (larval stage) (ENGELMANN 1970;OLDIGES 1959;OTTO 1970;PHILOGENE and BENJAMIN 1971;VOUTE 1957;ZWOLFER 1934;MARKALAS 1982). In the first flying period all treatments of the experiment had the same number of eggs (about 250) besides the treatment with very moist soil (No.…”

POTENTIAL OF ANTIFEEDANTS TO CONTROL LARVAL FEEDING OF SELECTED NEODIPRION SAWFLIES (HYMENOPTERA: DIPRIONIDAE)

“…This probably was influenced by the long photoperiod (20 h) and, temperature (25°C) to which they were subjected. Philogtne and Benjamin (1971) reported comparable mortality when N. swainei was reared in 18 h photoperiod/30°C conditions. No larvae died when reared on foliage treated with acetone:water (1 :4).…”

The biology and control of the pine sawfly, Nesodiprion biremis (Konow) (Hymenoptera, Diprionidae), in northern Thailand

“…The number of larval instars frequently differs in the two sexes of Diprionidae, the male having one fewer than the female (e.g., Becker & Benjamin, 1964Lyons, 1964). The number may also be related to environmental conditions such as temperature and photoperiod (Philogene & Benjamin, 1971). In Nesodiprion biremis, there are normally five feeding instars and a sixth non-feeding instar in both sexes.…”