Work

Bio-efficiency of Methanolic Extracts of Leaves of Plectranthus glandulosus on Mortality and Offspring of Sitophilus zeamais F1 in Maize Protection

Year: 2020

Type: article

Abstract: To find an alternative to environmentally harmful chemical pesticides, the methanolic extracts of Plectranthus glandulosus leaves were evaluated for mortality and F1 offspring production of Sitophilus zeamais. Delvap Super® was applied as a reference insecticide at the recommended dose (0.1 g / kg), while the extracts were used at four doses (5, 10, 20 and 40 g / kg). Adult mortality was recorded daily for 14 days post-treatment. One day after exposure, Delvap Super® killed 100 % of the weevils, and the extracts caused 96.66 % mortality with the highest dose (40 g / kg). The LD50 value in four days was 3.72 g / kg. From the smallest (5 g / kg) to the largest dose (40 g / kg), the extracts significantly reduced the emergence of offspring respectively 43.87 to 100 %. Considering these results, these extracts could be recommended as alternatives to synthetic insecticides against S. zeamais in storage.

Source: Zenodo (CERN European Organization for Nuclear Research)

DOI: 10.5281/zenodo.3975492

Authors: Haouvang Laba Christophe, Dessenbe Théophile, Nukenine Elias, N.

Institutions: International Institute of Tropical Agriculture, International Institute of Tropical Agriculture, University of Ngaoundéré

Language: English

Topic: Insect Pest Control Strategies

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: green

Funder: International Development Research Centre