Efficiency of spinosad, Bacillus thuringiensis and Trichogramma brassicae against the tomato leafminer in greenhouse

The objective of this study was to evaluate the efficacy of three eco-friendly control agents, either singly or in a pairwise combination, for the control of the tomato leafminer, Tuta absoluta (Meyrick) (Lep: Gelechiidae). They include the naturally derived pesticide spinosad, a commercially availa...

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Bibliographic Details
Published in:BioControl (Dordrecht, Netherlands) Netherlands), 2018-10, Vol.63 (5), p.619-627
Main Authors: Jamshidnia, Arsalan, Abdoli, Saba, Farrokhi, Shahram, Sadeghi, Reza
Format: Article
Language:English
Subjects:
Agriculture
Animal Biochemistry
Animal Ecology
Bacillus thuringiensis
Bacteria
Behavioral Sciences
Biomedical and Life Sciences
Efficiency
Eggs
Entomology
Experiments
Females
Greenhouses
Insecticides
Laboratories
Life Sciences
Mortality
Pesticides
Plant Pathology
Pollinators
Spinosad
Tomatoes
Trichogramma brassicae
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Summary:The objective of this study was to evaluate the efficacy of three eco-friendly control agents, either singly or in a pairwise combination, for the control of the tomato leafminer, Tuta absoluta (Meyrick) (Lep: Gelechiidae). They include the naturally derived pesticide spinosad, a commercially available formulation of Bacillus thuringiensis var. Kurstaki ( Bt ), and a native population of Trichogramma brassicae Bezdenko (Hym: Trichogrammatidae). Tomato plants containing the T. absoluta were treated with one of the seven following treatments in a greenhouse: (1) a single release of T. brassicae against the eggs; (2) two applications of Bt (2 kg ha −1 ); (3) and (4) one application of spinosad at two rates (60 and 120 g a.i. ha −1 ); (5) T. brassicae release +  Bt spray; (6) T. brassicae release + spinosad spray; and (7) spinosad spray +  Bt spray. The highest mortality rate was recorded for the spinosad +  Bt (88.33 ± 1.43%) and T. brassicae  + spinosad (78.33 ± 3.74%) combinations, respectively; while the lowest mortality rate was obtained through the single application of T. brassicae (31.67 ± 4.84%). Based on our results, the Bt and spinosad seem to be suitable candidates for combination with other biological and cultural techniques towards an integrated management of the tomato leafminer.
ISSN:1386-6141
1573-8248
DOI:10.1007/s10526-018-9893-5