Push-pull strategy combined with net houses for controlling cowpea insect pests and enhancing crop yields

Diabate Seydou, Martin Thibaud, Murungi Lucy Kananu, Fiaboe Komi K. Mokpokpo, Wesonga John, Kimani John M., Deletre Emilie. 2021. Push-pull strategy combined with net houses for controlling cowpea insect pests and enhancing crop yields. Crop Protection, 141:105480, 10 p.

Quartile : Q1, Sujet : AGRONOMY

Résumé : Net houses can be used in tropical environments to protect crops such as cowpea against large insect pests, thereby avoiding pesticide treatments while sustainably mitigating the effects of climate change. We investigated a push-pull strategy to prevent small insect pest outbreaks in a net house. The push component consisted of two stimulus plants, i.e. Cymbopogon citratus and Tagetes minuta, and the pull stimuli consisted of visual cues from blue and yellow sticky traps. Field experiments were set up in central Kenya and conducted during a rainy and a dry season, involving an open field control treatment, and three management treatments consisting of (1) an open field push-pull treatment, (2) a net house treatment and (3) a combined net house + push-pull treatment. Trialeurodes vaporariorum infestations were lower in the net house and net house + push-pull treatments than in the two open field treatments during the dry period or in the control treatment during the rainy period. Aphis craccivora infestations were higher in the net house and net house + push-pull treatments than in the control and open field push-pull treatments during the dry period, while no differences were observed among treatments during the rainy period. Megalurothrips sjostedti infestations did not vary among treatments in both periods. Among the larger insect pests, Clavigralla tomentosicollis infestations were lower in the net house and net house + push-pull treatments than in the open field treatments during the dry period, while Maruca vitrata infestations were lower in the net house treatment than in the control. During the rainy period, C. tomentosicollis infestations were higher in the net house + push-pull treatment than in the net house treatment, whereas M. vitrata infestations did not vary among treatments. Compared to the control, Empoasca sp. infestations were lower in the net house and net house + push-pull treatments in both periods, and in the open field push-pull treatment in the rainy period. Cowpea pod and grain yield and quality were higher in the net house and net house + push-pull treatments than in the control irrespective of the period. Although the treatments 1 reduced some of the pests, the net house and net house + push-pull treatments were effective in protecting cowpeas against most of the pests while improving pod yields in both periods.

Mots-clés Agrovoc : lutte anti-insecte, changement climatique, serre d'ombrage, filet anti-nuisibles, insecte nuisible, niébé, lutte antiravageur, rendement des cultures, Tagetes minuta, Tagetes, Maruca, protection des plantes, Maruca vitrata, atténuation des effets du changement climatique

Mots-clés géographiques Agrovoc : Kenya

Mots-clés libres : Net house, Integrated pest management, Push-pull, Sticky traps, Insect pests

Agences de financement hors UE : Bundesministerium für Wirtschaftliche Zusammenarbeit und Entwicklung, Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Kenya Agricultural and Livestock Research Organization

Auteurs et affiliations

• Diabate Seydou, ICIPE (KEN) - auteur correspondant
• Martin Thibaud, CIRAD-PERSYST-UPR HortSys (CIV) ORCID: 0000-0002-4915-4436
• Murungi Lucy Kananu, Jomo Kenyatta University of Agriculture and Technology (KEN)
• Fiaboe Komi K. Mokpokpo, IITA (CMR)
• Wesonga John, Jomo Kenyatta University of Agriculture and Technology (KEN)
• Kimani John M., KALRO (KEN)
• Deletre Emilie, CIRAD-PERSYST-UPR HortSys (KEN)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/605783/)

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