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Workshop “Fall armyworm control: challenges and opportunities for the use of biopesticide”

Geoffrey nyapom Author

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    Display nameGeoffrey Anyanda
    First nameGeoffrey
    Last nameAnyanda
    Emailanyandajeff2@gmail.com
    RoleResearcher
    CountryKenya
    OrganisationCIMMYT-Kenya
    Area of ResearchSocio-economics and Impact Assessment
    Describe your research

    Direct estimation of maize yield loss caused by fall armyworm using six CIMMYT genotypes in artificial and on natural infestation in major maize growing agro ecologies in Kenya. In addition, i conducted a trial on the life table of the fall armyworm in controlled conditions using the same genotypes as natural diet for the larvae as well as for the fecundity studies.

    ORCID iD
    Google Scholar Link
    Member sinceJuly 15, 2020
    Topics posted12
    Replies16
  • Topics Started

    • Workshop “Fall armyworm control: challenges and opportunities for the use of biopesticide”
      February 15, 2021

    • Could fall armyworm, invasion in Africa contribute to the displacement of cereal stemborers in maize and sorghum cropping systems
      January 29, 2021

    • Performance of elite maize genotypes under fall armyworm artificial infestation in Kenya.
      January 20, 2021

    • Managing fall armyworm (FAW) in corn production in Indonesia-Malaysia-Thailand Growth Triangle (IMT-GT)
      January 19, 2021

    • New mobile phone app ‘Nuru’, which uses machine learning and artificial intelligence, offers some hope in tackling FAW
      December 28, 2020

    • Breakthrough is here. CIMMYT-Kenya introduces derived fall armyworm tolerant elite maize hybrids
      December 23, 2020

    • Fall Armyworm (FAW) prevention under the Framework of FAO Global Action on FAW control
      December 13, 2020

    • Can socio-economic and agro-ecological data be used to estimate food insecurity levels across house-holds in SSA as a function of exposure to FAW invasion risk, and vulnerability and lack of coping strategies among the exposed populations ?
      December 10, 2020

    • Communication is key: CABI publishes framework for strategic communications during pest outbreaks
      December 10, 2020

    • Addressing the impact of COVID-19 on global action for Fall armyworm control
      December 9, 2020

    1 2 Next »
  • Replies

    • Thank you for posting this @xavier . @nuambote is working on something similar in Kenya.
      February 22, 2021

    • Thank you @anne-njoroge
      February 15, 2021

    • This is very interesting .Thank you @sandra-garces
      February 11, 2021

    • Thank you @marckenis
      February 1, 2021

    • This is very impressive work. Were the two studies done in the same locations in Ghana?
      January 31, 2021

    • In Kenya, 63% of women contribute to labor for weeding and 52% for harvesting as reported by Kassie in 2014. Recent paper by Hugo De Groote, women had more knowledge about fall armyworm, since they are more involved in farming management especially during vegetative stages where damage is more visible. See here : https://www.sciencedirect.com/science/article/abs/pii/S0305750X13002374# https://www.researchgate.net/publication/338500902_Spread_and_impact_of_fall_armyworm_Spodoptera_frugiperda_JE_Smith_in_maize_production_areas_of_Kenya
      January 21, 2021

    • Hello Steve This argument remains valid, especially with the sudden arrival of a dramatic invasive pest like FAW. The discussion can only be settled through a rigorous comparison of field trials with farmer estimates, preferably both with individual farmers and through community surveys. 
      January 8, 2021

    • The potential impact on the budding private seed sector in many countries in SSA further drag on attainment of the 2030 Agenda for Sustainable Development Goals, particularly of zero hunger, no poverty. Maize is attacked by FAW at virtually all the phenological stages of the maize thereby causing severe losses when the whorl is destroyed. At the later phenological stages larvae also feeds on the tassels, burrow into the cobs and destroy the kernels, as well as expose the cob to infection by microorganisms including the mycotoxin producing fungi. Such cobs are 100% lost as they become non-harvestable. Damage to maize seed production fields does not only affect the availability of seed to farmers in the following growing seasons but also becomes an additional barrier to the economic viability of the emerging private seed sector. A typical example would be on international trade , following establishment of FAW in Africa, the EU instigated emergency measures requiring strict phytosanitary controls in exporting countries to reduce the risk of the pest reaching Europe. I hope this answers your question.
      January 8, 2021

    • Hello @berice-imbayi thank you for your question.

      1. Yes its possible to estimate yield loss caused by FAW in regions where regional statistics are unavailable . See this paper https://www.researchgate.net/publication/338500902_Spread_and_impact_of_fall_armyworm_Spodoptera_frugiperda_JE_Smith_in_maize_production_areas_of_Kenya.
      2. In open field screening its not easy to have good control plots since pest occurrences are infrequent. Its would be advisable to collect all pests during harvesting and calculate the population density of each the pests. The population density would clearly show which pest had an impact on the yield. When choosing site location, FAW hotspots would be recommended.
      3. The action threshold level can be calculated by fitting regression equation Y = a + bx between the FAW population density and benefit cost ratio .Pest density corresponding to unit benefit cost ratio would be the economic injury level and the economic threshold levels set at 75% of EIL .Weekly economic injury levels can also be calculated from a formula : E = C/PDK, where C is the cost per hectare of an insecticide application, P is the market price of maize, D is the loss in yield per hectare at 100% infestation, and K is the reduction in pest attack achieved by control.

      December 17, 2020

    • Dear Steve Yes they had specific genotypes. pre-commercial tolerant genotypes, OPVs and commercial hybrids
      December 11, 2020

    1 2 Next »
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