Symposium: Prediction and monitoring of pest outbreaks Prediction of grass grub,Costelytra zealandica, (Coleoptera: Scarabaeidae) populations

Autor:	R. East, W. M. Kain
Rok vydání:	1982
Předmět:	Scarabaeidae Previous generation Adverse weather biology Agronomy Costelytra zealandica Ecology Insect Science food and beverages Outbreak PEST analysis biology.organism_classification Population density
Zdroj:	New Zealand Entomologist. 7:222-227
ISSN:	1179-3430 0077-9962
DOI:	10.1080/00779962.1982.9722385
Popis:	The sedentary nature of grass grub, Costelytra zealandica (White), infestations and the tendency for populations to increase steadily over several generations until they reach damaging levels allow populations over the build-up phase to be predicted with reasonable accuracy from the numbers present in the previous generation. Analysis of grass grub population densities from 3 areas of New Zealand showed that in the absence of catastrophic density-independent mortalities caused by adverse weather such as summer droughts, simple logarithmic regressions of the density in 1 generation (Nn + 1) against that in the previous generation (Nn) accounted for 80% of the variation in log Nn + 1, on average. Some consequences for the control of grass grub with insecticides are discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9f411c8ff7d561f5cb2eacb61deac4f0 https://doi.org/10.1080/00779962.1982.9722385 Zobrazit plný text záznamu