Version 1
: Received: 13 September 2023 / Approved: 14 September 2023 / Online: 15 September 2023 (10:57:51 CEST)
How to cite:
Halerimana, C.; Kyamanywa, S.; Otim, M.H. Population Dynamics of Selected Field Pests and Their Effect on Grain Yield and Yield Components of Common Bean in Uganda. Preprints2023, 2023091026. https://doi.org/10.20944/preprints202309.1026.v1
Halerimana, C.; Kyamanywa, S.; Otim, M.H. Population Dynamics of Selected Field Pests and Their Effect on Grain Yield and Yield Components of Common Bean in Uganda. Preprints 2023, 2023091026. https://doi.org/10.20944/preprints202309.1026.v1
Halerimana, C.; Kyamanywa, S.; Otim, M.H. Population Dynamics of Selected Field Pests and Their Effect on Grain Yield and Yield Components of Common Bean in Uganda. Preprints2023, 2023091026. https://doi.org/10.20944/preprints202309.1026.v1
APA Style
Halerimana, C., Kyamanywa, S., & Otim, M.H. (2023). Population Dynamics of Selected Field Pests and Their Effect on Grain Yield and Yield Components of Common Bean in Uganda. Preprints. https://doi.org/10.20944/preprints202309.1026.v1
Chicago/Turabian Style
Halerimana, C., Samuel Kyamanywa and Michael H. Otim. 2023 "Population Dynamics of Selected Field Pests and Their Effect on Grain Yield and Yield Components of Common Bean in Uganda" Preprints. https://doi.org/10.20944/preprints202309.1026.v1
Abstract
In Uganda, the common bean (Phaseolus vulgaris) is often infested by a complex of insect pests, but the bean stem maggots, aphids, bean leaf beetles, and flower thrips are the most important. Whereas yield losses due to these pests have been established, there is limited information on their population dynamics at different stages of crop growth and their effect on yield and yield components. In order to describe the population dynamics of selected common bean pests at various phases of bean crop growth, and their impact on yield and yield components, a study was carried out in Uganda during 2016 second rains and 2017 first rains in three agro-ecological zones. Bean fly, bean aphids, bean leaf beetles, whitefly, striped bean weevil, leaf hoppers, and caterpillars of Lepidopteran species were the main insects observed. Pesticide spray schedules were imposed to generate different populations of insect pests whose effects on yield and its components were determined. The findings indicate that spray regimes significantly influenced the abundance of bean fly, aphids, whitefly, striped bean weevil, and leaf hoppers but not bean leaf beetles and caterpillars. Additionally, except caterpillars, insect pests were significantly influenced by crop growth stages, but only aphids, whiteflies, bean flies and leaf hoppers exhibited a significant negative relationship with grain yield. Furthermore, yield and yield components varied significantly between spray regimes, agro-ecological zones, and seasons. Our study is important in informing growers on the stage of crop growth at which management tactics such as use of insecticides can be applied for different insect pests.
Keywords
common bean; pests complex; abundance; insecticides; spray regimes
Subject
Biology and Life Sciences, Insect Science
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
