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New Zealand Plant Protection 68 (2015): 440

Survival and reproduction of Liberibacter-infected tomato potato psyllid reared under cold environmental conditions

W.R.M. Sandanayaka, V.A. Davis and G.P. Walker


The tomato potato psyllid (TPP, Bactericera cockerelli) survives on volunteer potatoes growing in frost-free areas in winter in the Auckland region and therefore could transmit Candidatus Liberibacter solanacearum (Lso) to commercial crops. The survival and oviposition of laboratory-reared Lso-infected TPP were tested under four selected environmental conditions: 12:12 h light:dark at 10C; 13:11 h light:dark at 12C; 14:10 h light:dark at 14C; and 15:9 h light:dark at 16C, on excised leaves from volunteer potatoes (grown in the field during winter) and tomato (grown in the glasshouse). One hundred pairs of adult TPP (10 pairs/leaf) were tested on either potato or tomato in each environmental condition for 7 days. Survival of females on potato or tomato was not significantly different between photoperiod but remained unhatched in all tested temperatures. Results revealed that Lso-infected TPP could feed (as indicated by excretory droplets), oviposit and survive on volunteer potatoes in Auckland winter-like conditions and potentially transmit Lso to crops grown in these cooler months.

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