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Economic injury levels and sequential sampling plans for Frankliniella schultzei in watermelon crops
Author(s) -
Pereira Poliana S,
Sarmento Renato A,
Galdino Tarcísio VS,
Lima Carlos HO,
dos Santos Fábio A,
Silva Joedna,
dos Santos Gil R,
Picanço Marcelo C
Publication year - 2017
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.4475
Subject(s) - thrips , pest analysis , integrated pest management , biology , crop , thripidae , economic threshold , sampling (signal processing) , cucurbitaceae , agronomy , horticulture , filter (signal processing) , computer science , computer vision
BACKGROUND The thrips Frankliniella schultzei is an important watermelon pest. Nevertheless, economic injury levels and sampling plans for this pest have not yet been determined for this crop. Thus, the objective of the present study was to determine the economic injury levels and develop sequential sampling plans for F. schultzei in conditions of low, medium and high fruit prices. RESULTS The attack of F. schultzei on watermelon plants at the vegetative stage reduced the crop's productivity, which did not happen at the flowering and fruiting stage. The economic injury levels were 0.09, 0.04 and 0.02 thrips leaf −1 when the watermelon price was low ($ US 62.5 t −1 ), medium ($ US 140.63 t −1 ) and high ($ US 218.75 t −1 ) respectively. The three sequential sampling plans for F. schultzei generated for the economic injury levels resulted in similar and more rapid decisions compared with the conventional plan, especially when the pest density was high. CONCLUSIONS The three economic injury levels and the sequential sampling plans generated in the present study can be incorporated into integrated pest management programmes for watermelon crops because these plans provide a rapid and adequate control decision for F. schultzei . © 2016 Society of Chemical Industry