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Reducing losses inflicted by insect pests on cashew, using weaver ants as a biological control agent

1 In Benin cashew plantations, yields and nut quality are lost mainly as a result of insect
pests. In the present study, we investigated the effectiveness of the African weaver ant
Oecophylla longinoda as a biocontrol agent against Beninese cashew pests.

2 In a 2-year study, nut yield and quality were compared among: (i) trees with weaver
ants O. longinoda; (ii) trees where weaver ants were sugar-fed; (iii) integrated pest
management (IPM) trees with weaver ants combined with fruit fly bait spray; and (iv)
control trees receiving no control measures.

3 All treatments with ants showed significantly higher yields than the control, with
the IPM treatment leading to the highest yield. Compared with the control trees, the
ants, ant sugar-fed and the IPM trees produced 78%, 122% and 151% more nuts,
respectively. Nuts produced on control trees were of a higher quality on average
because they were less damaged by thrips (probably because the fruit fly bait worked
as a contact poison on thrips); this was also the case for the IPM treatment. In absolute
numbers, however, trees in ant treatments produced more first-quality nuts.

4 To achieve a broader and effective control of both coreid bugs and thrips, a
combination of weaver ants and supplementary compatible control measures is
recommended.

Keywords: Biocontrol, cashew yield, nut quality, Oecophylla longinoda, pest damages.

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Informasi Detail
Judul Seri
Agricultural and Forest Entomology
No. Panggil
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Penerbit
New York : The Royal Entomological Society.,
Deskripsi Fisik
Agricultural and Forest Entomology (2015), 17, 285–291
Bahasa
English
ISBN/ISSN
10.1111/afe.12105
Klasifikasi
-
Tipe Isi
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Tipe Media
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Tipe Pembawa
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Edisi
(2015), 17
Subjek
ENTOMOLOGI PERTANIAN
Info Detail Spesifik
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Pernyataan Tanggungjawab
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