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Comparative Experimental Effects of Intercropping and Cypermethrin on Insect Pest Infestation and Yield of Maize, Cowpea and Okra in Two Cameroonian Agro-Ecological Zones

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Department of Biological Sciences, University of Ngaoundéré, 455 Ngaoundere, Cameroon
2
Center for Environmental Research and Sustainable Technology, University of Bremen, D 28359 Bremen, Germany
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Author to whom correspondence should be addressed.
Academic Editor: Murali Krishna Gumma
AgriEngineering 2021, 3(2), 383-393; https://doi.org/10.3390/agriengineering3020025
Received: 4 March 2021 / Revised: 1 June 2021 / Accepted: 3 June 2021 / Published: 9 June 2021
The present study investigates the effect of intercropping (maize-cowpea, maize-okra, maize-okra-cowpea, okra-cowpea) compared to insecticide application on the level of infestation of insect pests and the final yield of maize, cowpea and okra. Field experiments were conducted during the 2016 and 2017 cropping seasons in the Guinean Savannah (Dang-Ngaoundere) and Sudano Sahelian (Gouna-Garoua) agro-ecological zones in Cameroon. Our experimental design was a split plot arrangement in a randomized complete block with four replications. The main factor was assigned to the use of insecticide (Cypermethrin) and sub plots were devoted for cropping systems. We compared the efficiency of intercropping to that of Cypermethrin application on the Yield of maize, cowpea and okra as influenced by insect pest damages. The comparison of monocropped sprayed by Cypermethrin to unsprayed showed that, in Dang, insect pests reduced maize yield by 37% and 24% in 2016 and 2017, respectively, whereas in Gouna, it was lower than 8% during the both years. Reduction in seed yield by insect pests on cowpea in Dang represented 47% and 50% in 2016 and 2017, respectively, whereas in Gouna, it was 55% and 63% in 2016 and 2017, respectively. For okra, insect pests reduced okra fruit yield by 25% and 44% in Dang and 23% and 28% in Gouna, respectively, in 2016 and 2017. Crop yield was lower in intercropping compared to monoculture due to competition of plants in association on different resources. Considering the total yields obtained from each intercropping, intercropping trials resulted generally in higher yields compared to mono-culture (LER > 1) in both sites and years but the respective yields were quite different. On the basis of the results obtained, we recommend maize-cowpea intercropping as a sustainable solution to reduce the infestation level of their pest insects. View Full-Text
Keywords: intercropping; cypermethrin; insect; pest; productivity; Cameroon intercropping; cypermethrin; insect; pest; productivity; Cameroon
MDPI and ACS Style

Farsia Djidjonri, P.; Nchiwan, N.E.; Koehler, H. Comparative Experimental Effects of Intercropping and Cypermethrin on Insect Pest Infestation and Yield of Maize, Cowpea and Okra in Two Cameroonian Agro-Ecological Zones. AgriEngineering 2021, 3, 383-393. https://doi.org/10.3390/agriengineering3020025

AMA Style

Farsia Djidjonri P, Nchiwan NE, Koehler H. Comparative Experimental Effects of Intercropping and Cypermethrin on Insect Pest Infestation and Yield of Maize, Cowpea and Okra in Two Cameroonian Agro-Ecological Zones. AgriEngineering. 2021; 3(2):383-393. https://doi.org/10.3390/agriengineering3020025

Chicago/Turabian Style

Farsia Djidjonri, Patient, Nukenine E. Nchiwan, and Hartmut Koehler. 2021. "Comparative Experimental Effects of Intercropping and Cypermethrin on Insect Pest Infestation and Yield of Maize, Cowpea and Okra in Two Cameroonian Agro-Ecological Zones" AgriEngineering 3, no. 2: 383-393. https://doi.org/10.3390/agriengineering3020025

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