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1 February 2001 Relationship of Scots Pine Clone Characteristics and Water Stress to Hatching and Larval Performance of the Sawfly Diprion pini (Hymenoptera: Diprionidae)
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Abstract

Most Symphyta are phytophagous and lay their eggs in the host plant in contact with the plant tissue. We tested the hypothesis that Diprion pini L. egg hatching and larval survival vary between Scots pine clones with particular foliage characteristics. We also tested the influence of water limitation on hatching rates. Larval survival and hatching rate of D. pini eggs differed significantly among Pinus sylvestris L. genotypes and they were not correlated. We confirmed that the presence of taxifolin, a phenolic compound, and quantity of 3-carene were correlated with low larval survival. Foliage analysis showed an inverse relationship between hatching rate and dry matter content of foliage. The hatching rate on a tree varies, according to needle water content. This suggests that the success of egg development might be important for the population dynamics of D. pini.

Florence Pasquier-Barre, Cécile Palasse, Francis Goussard, Marie-Anne Auger-Rozenberg, and Claude Géri "Relationship of Scots Pine Clone Characteristics and Water Stress to Hatching and Larval Performance of the Sawfly Diprion pini (Hymenoptera: Diprionidae)," Environmental Entomology 30(1), 1-6, (1 February 2001). https://doi.org/10.1603/0046-225X-30.1.1
Received: 22 December 1999; Accepted: 1 July 2000; Published: 1 February 2001
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