Using panel community surveys to track the impact of crop pests over time and space – the case of maize lethal necrosis (MLN) disease in Kenya from 2013 to 2018
Maize lethal necrosis (MLN) disease appeared in Kenya in 2011, causing major damage. In a first survey of 121 communities in 2013, participants estimated the proportion of households affected and the yield loss in affected areas; from this survey, the overall loss was estimated at 22% (0.5 million tonnes per year), concentrated in western Kenya (94%). Efforts to combat the disease included planting resistant varieties, creating awareness of MLN management, and producing pathogen-free seed. In 2018, the same communities were revisited and asked the same questions, establishing a panel community survey. The results showed that incidents of MLN had greatly decreased, and the number of communities that had observed it had reduced from 76% in 2013 to 26% by the long rains of 2018; while still common in western Kenya (60%), MLN had greatly reduced elsewhere (to 10%). In 2013, 40% of farmers were affected, yield loss among affected farmers was estimated at 44%, and total yield loss was estimated at 22% (a production loss of 0.5 million tonnes/year), valued at US$ 187 million. By the long rains of 2018, 23% of farmers were affected, with a loss among affected farmers of 36%; overall annual loss was estimated at 7.5% or 0.37 million tonnes, valued at US$ 109 million, concentrated in western Kenya (82%). Of the recommended control measures, only the removal of diseased plants was commonly used (by 62% of affected communities), but not the use of agronomic practices (11%) or resistant varieties (9.5%). The reasons for the reduction in MLN are not well understood; external factors such as spraying insecticide against fall armyworm and unfavorable weather likely played a role, as did using disease-free seed, but not the use of resistant varieties or appropriate management practices. Still, as the pathogen is still in the fields, it is important to keep disseminating these control methods, in particular resistant varieties.
Main Authors: | , , , , , |
---|---|
Format: | Article biblioteca |
Language: | English |
Published: |
American Phytopathological Society
2021
|
Subjects: | AGRICULTURAL SCIENCES AND BIOTECHNOLOGY, Maize Lethal Necrosis, Farmer Estimates, Community Survey, Focus Group Discussions, MAIZE, PLANT DISEASES, SURVEYS, CROP LOSSES, |
Online Access: | https://hdl.handle.net/10883/21677 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
dig-cimmyt-10883-21677 |
---|---|
record_format |
koha |
spelling |
dig-cimmyt-10883-216772022-09-20T14:01:30Z Using panel community surveys to track the impact of crop pests over time and space – the case of maize lethal necrosis (MLN) disease in Kenya from 2013 to 2018 De Groote, H. Munyua, B. Palmas, S. Mahabaleswara, S.L. Bruce, A.Y. Kimenju, S.C. AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Maize Lethal Necrosis Farmer Estimates Community Survey Focus Group Discussions MAIZE PLANT DISEASES SURVEYS CROP LOSSES Maize lethal necrosis (MLN) disease appeared in Kenya in 2011, causing major damage. In a first survey of 121 communities in 2013, participants estimated the proportion of households affected and the yield loss in affected areas; from this survey, the overall loss was estimated at 22% (0.5 million tonnes per year), concentrated in western Kenya (94%). Efforts to combat the disease included planting resistant varieties, creating awareness of MLN management, and producing pathogen-free seed. In 2018, the same communities were revisited and asked the same questions, establishing a panel community survey. The results showed that incidents of MLN had greatly decreased, and the number of communities that had observed it had reduced from 76% in 2013 to 26% by the long rains of 2018; while still common in western Kenya (60%), MLN had greatly reduced elsewhere (to 10%). In 2013, 40% of farmers were affected, yield loss among affected farmers was estimated at 44%, and total yield loss was estimated at 22% (a production loss of 0.5 million tonnes/year), valued at US$ 187 million. By the long rains of 2018, 23% of farmers were affected, with a loss among affected farmers of 36%; overall annual loss was estimated at 7.5% or 0.37 million tonnes, valued at US$ 109 million, concentrated in western Kenya (82%). Of the recommended control measures, only the removal of diseased plants was commonly used (by 62% of affected communities), but not the use of agronomic practices (11%) or resistant varieties (9.5%). The reasons for the reduction in MLN are not well understood; external factors such as spraying insecticide against fall armyworm and unfavorable weather likely played a role, as did using disease-free seed, but not the use of resistant varieties or appropriate management practices. Still, as the pathogen is still in the fields, it is important to keep disseminating these control methods, in particular resistant varieties. 1259-1271 2021-10-04T14:13:07Z 2021-10-04T14:13:07Z 2021 Article Published Version https://hdl.handle.net/10883/21677 10.1094/PDIS-08-20-1730-SR English Open Access CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose. pdf Kenya St. Paul, MN (USA) American Phytopathological Society 5 105 0191-2917 Plant Disease |
institution |
CIMMYT |
collection |
DSpace |
country |
México |
countrycode |
MX |
component |
Bibliográfico |
access |
En linea |
databasecode |
dig-cimmyt |
tag |
biblioteca |
region |
America del Norte |
libraryname |
CIMMYT Library |
language |
English |
topic |
AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Maize Lethal Necrosis Farmer Estimates Community Survey Focus Group Discussions MAIZE PLANT DISEASES SURVEYS CROP LOSSES AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Maize Lethal Necrosis Farmer Estimates Community Survey Focus Group Discussions MAIZE PLANT DISEASES SURVEYS CROP LOSSES |
spellingShingle |
AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Maize Lethal Necrosis Farmer Estimates Community Survey Focus Group Discussions MAIZE PLANT DISEASES SURVEYS CROP LOSSES AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Maize Lethal Necrosis Farmer Estimates Community Survey Focus Group Discussions MAIZE PLANT DISEASES SURVEYS CROP LOSSES De Groote, H. Munyua, B. Palmas, S. Mahabaleswara, S.L. Bruce, A.Y. Kimenju, S.C. Using panel community surveys to track the impact of crop pests over time and space – the case of maize lethal necrosis (MLN) disease in Kenya from 2013 to 2018 |
description |
Maize lethal necrosis (MLN) disease appeared in Kenya in 2011, causing major damage. In a first survey of 121 communities in 2013, participants estimated the proportion of households affected and the yield loss in affected areas; from this survey, the overall loss was estimated at 22% (0.5 million tonnes per year), concentrated in western Kenya (94%). Efforts to combat the disease included planting resistant varieties, creating awareness of MLN management, and producing pathogen-free seed. In 2018, the same communities were revisited and asked the same questions, establishing a panel community survey. The results showed that incidents of MLN had greatly decreased, and the number of communities that had observed it had reduced from 76% in 2013 to 26% by the long rains of 2018; while still common in western Kenya (60%), MLN had greatly reduced elsewhere (to 10%). In 2013, 40% of farmers were affected, yield loss among affected farmers was estimated at 44%, and total yield loss was estimated at 22% (a production loss of 0.5 million tonnes/year), valued at US$ 187 million. By the long rains of 2018, 23% of farmers were affected, with a loss among affected farmers of 36%; overall annual loss was estimated at 7.5% or 0.37 million tonnes, valued at US$ 109 million, concentrated in western Kenya (82%). Of the recommended control measures, only the removal of diseased plants was commonly used (by 62% of affected communities), but not the use of agronomic practices (11%) or resistant varieties (9.5%). The reasons for the reduction in MLN are not well understood; external factors such as spraying insecticide against fall armyworm and unfavorable weather likely played a role, as did using disease-free seed, but not the use of resistant varieties or appropriate management practices. Still, as the pathogen is still in the fields, it is important to keep disseminating these control methods, in particular resistant varieties. |
format |
Article |
topic_facet |
AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Maize Lethal Necrosis Farmer Estimates Community Survey Focus Group Discussions MAIZE PLANT DISEASES SURVEYS CROP LOSSES |
author |
De Groote, H. Munyua, B. Palmas, S. Mahabaleswara, S.L. Bruce, A.Y. Kimenju, S.C. |
author_facet |
De Groote, H. Munyua, B. Palmas, S. Mahabaleswara, S.L. Bruce, A.Y. Kimenju, S.C. |
author_sort |
De Groote, H. |
title |
Using panel community surveys to track the impact of crop pests over time and space – the case of maize lethal necrosis (MLN) disease in Kenya from 2013 to 2018 |
title_short |
Using panel community surveys to track the impact of crop pests over time and space – the case of maize lethal necrosis (MLN) disease in Kenya from 2013 to 2018 |
title_full |
Using panel community surveys to track the impact of crop pests over time and space – the case of maize lethal necrosis (MLN) disease in Kenya from 2013 to 2018 |
title_fullStr |
Using panel community surveys to track the impact of crop pests over time and space – the case of maize lethal necrosis (MLN) disease in Kenya from 2013 to 2018 |
title_full_unstemmed |
Using panel community surveys to track the impact of crop pests over time and space – the case of maize lethal necrosis (MLN) disease in Kenya from 2013 to 2018 |
title_sort |
using panel community surveys to track the impact of crop pests over time and space – the case of maize lethal necrosis (mln) disease in kenya from 2013 to 2018 |
publisher |
American Phytopathological Society |
publishDate |
2021 |
url |
https://hdl.handle.net/10883/21677 |
work_keys_str_mv |
AT degrooteh usingpanelcommunitysurveystotracktheimpactofcroppestsovertimeandspacethecaseofmaizelethalnecrosismlndiseaseinkenyafrom2013to2018 AT munyuab usingpanelcommunitysurveystotracktheimpactofcroppestsovertimeandspacethecaseofmaizelethalnecrosismlndiseaseinkenyafrom2013to2018 AT palmass usingpanelcommunitysurveystotracktheimpactofcroppestsovertimeandspacethecaseofmaizelethalnecrosismlndiseaseinkenyafrom2013to2018 AT mahabaleswarasl usingpanelcommunitysurveystotracktheimpactofcroppestsovertimeandspacethecaseofmaizelethalnecrosismlndiseaseinkenyafrom2013to2018 AT bruceay usingpanelcommunitysurveystotracktheimpactofcroppestsovertimeandspacethecaseofmaizelethalnecrosismlndiseaseinkenyafrom2013to2018 AT kimenjusc usingpanelcommunitysurveystotracktheimpactofcroppestsovertimeandspacethecaseofmaizelethalnecrosismlndiseaseinkenyafrom2013to2018 |
_version_ |
1756087016958722048 |