Location, reproduction and movement of Neoseiulus californicus (Acari: Phytoseiidae) during the autumn, winter and spring in orchards in the south of France

Field samples and experiments conducted in apple orchards in the south of France showed that Neoseiulus californicus (McGregor) searched for prey on the trees and in the ground cover as late as mid-November 1993, and at least as early in the spring as the end of February 1994. Overwintering females...

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Bibliographic Details
Published in:Experimental & applied acarology 1994-10, Vol.18 (10), p.593-602
Main Authors: Raworth, D.A. (Pacific Agriculture Research Centre, Vancouver, B.C. (Canada)), Fauvel, G, Auger, P
Format: Article
Language:English
Subjects:
Acari
Animal biology
Biological and medical sciences
DEPREDADORES
ESTACIONES DEL ANO
FRANCE
FRANCIA
Fundamental and applied biological sciences. Psychology
HUERTO FRUTAL
Life Sciences
NEOSEIULUS
Neoseiulus californicus
ORCHARDS
Phytopathology. Animal pests. Plant and forest protection
Phytoseiidae
PREDATEUR
PREDATORS
Protozoa. Invertebrates
Records, symptoms, damages, economic importance, population surveys
SAISON
SEASONS
VERGER
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Summary:Field samples and experiments conducted in apple orchards in the south of France showed that Neoseiulus californicus (McGregor) searched for prey on the trees and in the ground cover as late as mid-November 1993, and at least as early in the spring as the end of February 1994. Overwintering females fed, expanded and produced viable eggs within 7.9 plus or minus 0.3 (SE) days given the natural light regime, adequate food and temperatures of 17.0 plus or minus 20.6 degree C. The first generation of N. californicus developed in the field during March and April 1994. N. californicus nymphs, females and males readily moved over bare ground and through a grass ground cover to trap plants located on stakes 1 m above the ground. In the laboratory, the rate of movement of adult females on 0.5 mm copper wire was a linear function of temperature above a threshold of 11.9 plus or minus 9 degree C. At 25 degree C they travelled 10 m per h. The migration rate of N. californicus to trap plants on stakes placed in an orchard 13 Apr. increased in 2 weeks from 0.07 to 0.57 predators/trap plant/degree-day, while the migration rate to plants placed directly in the ground cover was 1.45 predators/trap plant/degree-day. The largest population of N. californicus in April occurred on Barley, Hordeum murinum L. This plant produces pollen in April and May, and may be useful in biocontrol programs.
ISSN:0168-8162
1572-9702
DOI:10.1007/bf00051722