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Untersuchungen über die Fichtengespinstblattwespen Cephalcia spp. Panz. (Hym., Pamphiliidae) IV. Massenwechsel von Cephalcia abietis L. im oberschwäbischen Forstrevier Erolzheim (Fbz. Ochsenhausen) by O. Eichhorn; H. Bogenschütz is a Agricultural and Biological Sciences article available to read on EtoBox.
What is Untersuchungen über die Fichtengespinstblattwespen Cephalcia spp. Panz. (Hym., Pamphiliidae) IV. Massenwechsel von Cephalcia abietis L. im oberschwäbischen Forstrevier Erolzheim (Fbz. Ochsenhausen) about?
Studies on the web‐spinning spruce sawflies of the genus __Cephalcia__ spp. 1 Panz. (Hym., Pamphiliidae). IV. Population dynamics of __Cephalcia abietis__ L. in Upper Suabia. The paper describes the population dynamics of the spruce false webworm __Cephalcia abietis__ L. in an 80‐year‐old spruce stand in the forest area of Erolzheim near Ulm (Germany) between 1986 and 1996. Emerging sawflies and adult parasitoids were trapped in groundphotoeclectors and the descending host larvae in funnel‐traps. About 7000 host larvae and prepupae were dissected to evaluate the degree of parasitism. The emergence pattern of the sawfly was determined as well as the duration of the feeding period. The development of the majority of the sawfly individuals lasted 3 years; during the warm summer of 1994 univoltinism was observed in 36% of the population. Temperature was ascertained as the key factor for the variable duration of the dormancy and for the population dynamics of the forest pest. Since 1986, the year of heavy feeding, the density of emerging females, of descending larvae, and of prepupa in the soil decreased finally to a subepidemic level in 1996. The sex ratio (SI) of different host stages
Who reads Untersuchungen über die Fichtengespinstblattwespen Cephalcia spp. Panz. (Hym., Pamphiliidae) IV. Massenwechsel von Cephalcia abietis L. im oberschwäbischen Forstrevier Erolzheim (Fbz. Ochsenhausen)?
It is typically read by researchers, students, and practitioners in Agricultural and Biological Sciences.
- Author
- O. Eichhorn; H. Bogenschütz
- Publisher
- John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Verlag Paul Parey; Wiley (ISSN 0931-2048)
- Published
- 2000
- Language
- EN
- Field
- Agricultural and Biological Sciences (Life Sciences)