scholarly journals Evolution d'une nouvelle gradation de lophyre du pin (Diprion pini L.) dans le sud du Bassin Parisien I. - Développement de la gradation jusqu'en 1982 et relation avec les facteurs du milieu

1984 ◽  
Vol 41 (4) ◽  
pp. 375-404 ◽  
Author(s):  
C. GERI ◽  
F. GOUSSARD
Keyword(s):  
Diprion Pini

scholarly journals Heavy metal concentrations in males and females of three pine diprionids (Hymenoptera)

1990 ◽  
Vol 1 (3) ◽  
pp. 175-179 ◽  
Author(s):  
Kari Heliövaara ◽  
Rauno Väisänen ◽  
Eero Kemppi ◽  
Martin Lodenius
Keyword(s):  
Heavy Metal ◽  
Scots Pine ◽  
Neodiprion Sertifer ◽  
Metal Concentrations ◽  
Heavy Metal Concentrations ◽  
Diprion Pini ◽  
First Instar ◽  
Unpolluted Site ◽  
Males And Females

Heavy metal concentrations (Cu, Fe, Ni, Cd) in the cocoons of three gregarious pine diprionids, Gilpinia socia, Diprion pini and Neodiprion sertifer, were compared between the species and sexes. The sawflies were reared in the laboratory in colonies from the first instar larvae, being fed on Scots pine (Pinus sylvestis) needles collected from a heavily polluted or a relatively unpolluted site. The levels of copper, iron and nickel were two to three times as high in N. sertifer as in the two other species. Cadmium showed bioaccumulation in all three species. In N. sertifur and G. socia reared on polluted needles, the metal concentrations were higher in males than in females.

Influence of temperature on larval defecation and its use in estimating canopy population size of pine sawflies (Hymenoptera: Diprionidae)

1993 ◽  
Vol 83 (2) ◽  
pp. 245-249 ◽  
Author(s):  
J. Simandl
Keyword(s):  
Population Size ◽  
Larval Density ◽  
Test Species ◽  
Influence Of Temperature ◽  
Diprion Pini ◽  
Pine Sawflies ◽  
Air Temperatures ◽  
Influence Of Temperature On ◽  
Gilpinia Frutetorum ◽  
Macrodiprion Nemoralis

AbstractThe frequency of defecation in relation to constant0/simulated outdoor temperatures and larval age (instar) was examined under laboratory conditions in four species of pine sawflies (Diprionidae): Gilpinia frutetorum (Fabricius), Diprion pini (Linnaeus), D. similis (Hartig) and Macrodiprion nemoralis (Enslin). Defecation interval and total faecal production was regular under higher constant temperatures (higher production in younger instars, second and third) and production significantly decreased under varying air temperatures during the same period (24 hours) when larvae of younger instars were influenced more by lower temperatures. The influence of larval age (instar) on faecal production was insignificant if larvae were exposed to varying temperatures during 24 hours. Faecal production and temperature were positively correlated in each of the four species and instars tested, as well as in total (all the test species and instars combined). Implications of the results for estimating canopy larval density by frass-drop measurements in the field are briefly discussed.

Oviposition preference and larval survival of Diprion pini on Scots pine clones in relation to foliage characteristics

2000 ◽  
Vol 2 (3) ◽  
pp. 185-192 ◽  
Author(s):  
F. Pasquier-Barre ◽  
C. Geri ◽  
F. Goussard ◽  
M. A. Auger-Rozenberg ◽  
S. Grenier
Keyword(s):  
Scots Pine ◽  
Oviposition Preference ◽  
Larval Survival ◽  
Diprion Pini
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