Spring activity of adult alfalfa snout beetles (Coleoptera: Curculionidae): upward movement from overwintering sites, dispersal, and oviposition

The upward movement of adult alfalfa snout beetles, Otiorhynchus ligustici L. from overwintering sites in the soil was monitored and described in 2 alfalfa fields in upstate New York in 1991 and 1992. Oviposition and dispersal of emerged adult O. ligustici was also described and related to cumulativ...

Full description

Saved in:
Bibliographic Details
Published inJournal of economic entomology Vol. 88; no. 4
Main Authors Schroeder, P.C. (Southern Oregon State College, Ashland, OR.), Ferguson, C.S, Shields, E.J
Format Journal Article
LanguageEnglish
Published 01.08.1995
Subjects
CALOR
CHALEUR
COMPORTAMIENTO
COMPORTEMENT
ESTACIONES DEL ANO
MEDICAGO SATIVA
MOUVEMENT
MOVIMIENTO
NEW YORK
NUEVA YORK
OTIORRHYNCHUS
OVIPOSICION
PONTE
PRIMAVERA
PRINTEMPS
SAISON
SOL
SUELO
TEMPERATURA DEL AIRE
TEMPERATURA DEL SUELO
TEMPERATURE DE L'AIR
TEMPERATURE DU SOL
Online AccessGet more information

Cover

More Information
Summary:The upward movement of adult alfalfa snout beetles, Otiorhynchus ligustici L. from overwintering sites in the soil was monitored and described in 2 alfalfa fields in upstate New York in 1991 and 1992. Oviposition and dispersal of emerged adult O. ligustici was also described and related to cumulative degree-days (CDD) estimated from soil and air temperatures at each field. Cumulative degree-days estimated from soil temperatures (30 cm deep) and a 7 degrees C base threshold temperature significantly correlated with the upward movement a adult O. ligustici from overwintering sites in the soil. Ninety-five percent of the beetles reached the uppermost 2.5 cm of soil 30 CDD after complete soil thaw. Beetles began to lay eggs 166 CDD (3.3 degrees C base threshold) after complete soil thaw. Peak oviposition occurred at 200 CDD (3.3 degrees C base threshold) after complete soil thaw. After reaching the soil surface, adult O. ligustici began to disperse in search of acceptable food plants. Dispersal mostly occurred between 1st oviposition and peak oviposition
Bibliography:H10
9609870
ISSN:0022-0493
1938-291X
DOI:10.1093/jee/88.4.859