Phenological analysis of spring colonisation of apple trees by Anthonomus pomorum

S. Toepfer, Hainan Gu, Silvia Dorn

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Adult apple blossom weevils, Anthonomus pomorum (L.) (Coleoptera: Curculionidae), leave their overwintering sites within and outside orchards to colonise apple trees in early spring. This study was conducted to characterize the temporal pattern of spring colonization of apple trees by overwintered weevils in relation to climatic conditions and apple bud stages, based on multiple mark-release-recapture experiments and field observations of foraging activities of weevils. The process of spring colonization of apple trees by overwintered weevils was related to thermal time totals above 0°C. The dispersal into orchards initiated when the thermal time totals reached 161 ± 27 (s.d.) degree-days (DD) calculated from January 1, or 117 ± 16 DD from February 1. The daily dispersal speed of individual weevils within orchards was determined primarily by the maximum daily temperature, whereas crawling, feeding, and mating activities of weevils on apple trees were influenced by the mean evening temperature between 18:00 and 22:00 hours. On the other hand, the spring colonization of overwintered weevils was not synchronized with any specific apple bud stage, though the level of female foraging and reproductive activities on apple trees was related to apple bud stages. The overwintered weevils initiated dispersal into orchards over a wide range of bud developmental stages from little silver greenish tip B (51) to the mouse-ear stage C3 (54). These findings are discussed in relation to the ecology and pest management of this insect.

Original languageEnglish
Pages (from-to)151-159
Number of pages9
JournalEntomologia Experimentalis et Applicata
Volume103
Issue number2
DOIs
Publication statusPublished - May 1 2002

Fingerprint

Anthonomus pomorum
Curculionidae
bud
colonization
orchard
apples
orchards
buds
heat sums
overwintering
pest control
developmental stage
foraging
silver
heat
temperature
mark-recapture studies
analysis
insect control
insect

Keywords

  • Anthonomus pomorum
  • Apple bud stage
  • Coleoptera
  • Curculionidae
  • Dispersal
  • Foraging activity
  • Temperature
  • Thermal time totals

ASJC Scopus subject areas

  • Insect Science

Cite this

Phenological analysis of spring colonisation of apple trees by Anthonomus pomorum. / Toepfer, S.; Gu, Hainan; Dorn, Silvia.

In: Entomologia Experimentalis et Applicata, Vol. 103, No. 2, 01.05.2002, p. 151-159.

Research output: Contribution to journalArticle

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