Articles
INFLUENCE OF SOIL TYPE AND CLIMATE ON THE POPULATION DYNAMICS OF GRAPEVINE PHYLLOXERA IN AUSTRALIA
Article number
617_5
Pages
33 – 41
Language
English
Abstract
A comprehensive study was conducted to monitor the population dynamics and potential for spread of grapevine phylloxera Daktulosphaira vitifoliae (Fitch) in the King Valley, Rutherglen and Upton regions of NE Victoria, Australia.
Field monitoring from spring to autumn, commenced in October 2000 at four commercial vineyards.
Populations were monitored on grapevine roots, the soil surface, and within and above the vine canopy using a variety of destructive and non-destructive techniques.
Bimodal populations were evident on vine roots with a relatively large peak in summer.
Dispersive stages, mainly first instars, were also observed above ground.
These were relatively low in the spring, reached a single peak during early summer and declined from mid-to late-summer.
Consistent features in the phylloxera demographics at all four sites were (a) the relatively high abundance of first instars compared to other life stages (b) the relatively low abundance of alate forms (c) the occurrence of bimodal peaks in crawler abundance on vine roots and (d) between-site differences in the timing of peak crawler occurrence.
Populations were influenced by temperature, rainfall distribution and soil characteristics.
Field monitoring from spring to autumn, commenced in October 2000 at four commercial vineyards.
Populations were monitored on grapevine roots, the soil surface, and within and above the vine canopy using a variety of destructive and non-destructive techniques.
Bimodal populations were evident on vine roots with a relatively large peak in summer.
Dispersive stages, mainly first instars, were also observed above ground.
These were relatively low in the spring, reached a single peak during early summer and declined from mid-to late-summer.
Consistent features in the phylloxera demographics at all four sites were (a) the relatively high abundance of first instars compared to other life stages (b) the relatively low abundance of alate forms (c) the occurrence of bimodal peaks in crawler abundance on vine roots and (d) between-site differences in the timing of peak crawler occurrence.
Populations were influenced by temperature, rainfall distribution and soil characteristics.
Authors
K.S. Powell, W.F. Slattery, J. Deretic, K. Herbert, S. Hetherington
Keywords
Daktulosphaira vitifoliae, Vitis vinifera, demography
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