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VOL. 11, ISSUE 1 (2026)
Impact of insect pests on cashew tree production: Case of the stem borer Diastocera trifasciata Fabricius, 1775 in the sub-prefecture of Didievi (central cote d’ivoire)
Authors
Soro Lacina, Fondio Drissa, Diabaté Dohouonan, Tuo Yalamoussa, Soro Senan
Abstract
Cashew (Anacardium occidentale)
represents an important source of income for smallholder smallholder farmerss.
Unfortunately, its production is constrained by attacks from the stem borer
Diastocera trifasciata, which cause branch breakage. The objective of this
study was to assess the impact of D. trifasciata on cashew production.
Damage was evaluated through direct observations in 16 cashew orchards and
smallholder farmers surveys in the Didiévi department. In each orchard, 32
randomly selected trees located at the center of the plantation were inspected.
The number of trees and branches cut or girdled was recorded, and the diameter
of the girdled section attacked by D. trifasciata was measured using a tape.
Attack rates ranged between 10 and 20% across orchards in four localities. The
total girdled diameter (cm) for 32 trees surveyed varied between 45 and 58 cm.
Attack intensity was low in Koffikro and N’da Akissikro (I ≤ 0.5) and moderate
in Bodo and Groyakro (0.5 < I ≤ 1). Yields were highest in Koffikro (582.5
kg/ha) and N’da Akissikro (492.5 kg/ha), lowest in Groyakro (331.25 kg/ha), and
intermediate in Bodo (424.25 kg/ha). Moreover, the average total girdled
diameter was greater in orchards aged 10-20 years (51.11 cm), resulting in
significant sap loss and reduced yield (404.67 kg/ha). The most common control
method against D. trifasciata was mechanical removal. The use of
biopesticides could provide an effective alternative for managing this pest.
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Pages:454-458
How to cite this article:
Soro Lacina, Fondio Drissa, Diabaté Dohouonan, Tuo Yalamoussa, Soro Senan "Impact of insect pests on cashew tree production: Case of the stem borer <i>Diastocera trifasciata </i>Fabricius, 1775 in the sub-prefecture of Didievi (central cote d’ivoire)". International Journal of Entomology Research, Vol 11, Issue 1, 2026, Pages 454-458
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