New Zealand Plant Protection 66 (2013): 341-348
Sub-sampling of potato plants was assessed as a practical tool for monitoring Bactericera cockerelli, tomato-potato psyllid (TPP) and other key pests and their predators at Pukekohe. The total numbers of the key insect species and all their life stages on: (1) the bottom leaf; (2) a middle leaf (the bottom leaf on the top half of the stem); (3) the bottom half of the stem; and (4) the top half of the stem, were compared with numbers on the whole stem. Assessing the top half of the stem was the most reliable sub-sampling method for the three main insects sampled, while assessing a middle leaf also gave a reliable estimate for two out of the three insects. A crop scouting protocol for monitoring TPP infestations based on sampling 100 middle leaves off 50 randomly selected plants in a crop is now recommended by the potato industry in New Zealand.
Keywords: tomato-potato psyllid, Bactericera cockerelli, insect predators, plant sub-sampling, potatoes.
|A field trial to assess action thresholds for management of Bactericera cockerelli in main crop processing potatoes at Pukekohe|
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|A field trial to assess damage by Bactericera cockerelli to early potatoes at Pukekohe|
G.P. Walker, F.H. MacDonald, A.J. Puketapu, H.A. Fergusson, P.G. Connolly, P.J. Wright and J.A.D. Anderson (2012)
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|Monitoring Bactericera cockerelli and associated insect populations in potatoes in South Auckland|
G.P. Walker, F.H. MacDonald, N.J. Larsen and A.R. Wallace (2011)
New Zealand Plant Protection 64: 269-275
|Naturally occurring predators of Bactericera cockerelli in potatoes|
F.H. MacDonald, G.P. Walker, N.J. Larsen, and A.R. Wallace (2010)
New Zealand Plant Protection 63: 275
Copyright © 2013 New Zealand Plant Protection Society (Inc.).