Journal home   ·   This volume   ·   Previous abstract   ·   Next abstract

New Zealand Plant Protection 66 (2013): 385

The potential number of generations of Bactericera cockerelli in New Zealand

J. Vereijssen, L.T. Tran, S.P. Worner and D.A.J.Teulon,

ABSTRACT

The tomato potato psyllid (TPP), Bactericera cockerelli, invaded New Zealand in 2006 and has now spread throughout most of the country. TPP is an economically important pest of solanaceous crops that that not only causes damage through its feeding but also transmits the bacterium Candidatus Liberibacter solanacearum, which is associated with zebra chip disease in potato. Published developmental thresholds, meteorological data, and potato emergence and harvesting dates were used to estimate the potential number of generations of TPP for the main potato-growing regions in cold, average and hot spring and summer seasons in the 2006-2013 period. Temperature was highly variable in spring and summer between regions and between years within a region. The main effect of higher temperatures was that TPP generations were completed earlier, which resulted in up to one extra generation in a season. In the North Island regions, spring temperatures were such that up to two generations could develop before potato emergence, in contrast to the South Island, where less than one generation occurred during this time. This information can be used by crop managers to target management interventions for TPP more effectively.

Copyright © 2013 New Zealand Plant Protection Society (Inc.).

Please refer to the terms of use.