Emergence of the invasive beetle Anomala denuda Arrow 1819 (Coleoptera: Scarabaeidae) adult as a major pest of maize in Côte d’Ivoire

Author:

GBON Gueu Adolphe1ORCID,BOGA Jean-Pierre1,JOHNSON Félicia1,KISSI Thérèse Appoh Perrine1,TOFEL Haman Katamssadan2

Affiliation:

1. Université Félix Houphouët-Boigny: Universite Felix Houphouet-Boigny

2. Université de Bertoua cameroon

Abstract

Abstract In previous studies, the adult A. denula beetle was not classified as a major crop insect pest. The objective of this study was to elucidate the beetle's potential to inflict substantial damage to the crop as its larvae. The study was carried out on an experimental plot covering 2592m2, in the South region of Côte d'Ivoire. Peaks of A. denuda beetle abundance on the plot occur during the flowering stage of maize, between the 48th and 58th days after sowing. The study of the daily influx period revealed that the feeding and mating activities of the beetle were high between 10 pm and 12 am. Attack by this beetle has a significant impact on maize production when it happens between 1 and 6 days after flowering. Over the course of the three cropping years, yield losses of 26.62%, 32.31% and 21.35% were recorded in 2019, 20202 and 2021 respectively, resulting in an average loss of 26.76% attributable to the adult A. denuda. These results underscore the severity of A. denuda adult attacks on maize cultivation in the Guinean zone, questioning the previous notion that only larval stage was considered to cause serious damages. The present study reveals that the adult of this beetle is, therefore, capable of causing significant damage to maize crops, thus emphasising the necessity to implement effective and environmentally friendly control methods against A. denuda.

Publisher

Research Square Platform LLC

Reference30 articles.

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