Postharvest management of New Zealand flower thrips (Thrips obscuratus) on apricots using ethyl formate or pyrethrum-based treatments

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New Zealand flower thrips (NZFT, Thrips obscuratus (Crawford)) were exposed to a range of ethyl formate (EF) and pyrethrum-based postharvest treatments on apricots. Research showed that EF+CO2 or EF+N2 were effective treatments against NZFT and caused negligible damage to apricot fruit quality. However, pyrethrum dipping did not effectively control NZFT and caused significant internal damage to apricot fruit. Lethal concentration (LC99) estimates were developed for adult and larval NZFT using a range of EF concentrations (0-1.27% EF+CO2) and temperatures (5, 15 and 25°C). It is estimated that treatments of 1% (30.7 g/m3) EF at 5 or 25°C or a higher concentration of 1.5% (46.3 g/m3) at 15°C will achieve 99% mortality of NZFT adults and larvae on apricot fruit with 95% confidence.

Autores: 
A. Chhagan
Autores: 
L.E. Jamieson
Autores: 
M.J. Griffin
Autores: 
N.E.M. Page-Weir
Autores: 
J. Poulton
Autores: 
F. Zulhendri
Autores: 
R. Feng
Autores: 
P.G. Connolly
Autores: 
V.A. Davis
Autores: 
S. Olsson
Autores: 
S.P. Redpath
Autores: 
A.M. Kean
Autores: 
A.B. Woolf
Editora: 
New Zealand Plant Protection
Año: 
2013