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Affognon H., A. Njoroge and L. Murdock

Potential of PICS Bag for the Control of Larger Grain Borer ( Prostephanus truncatus ) - An Integrated Approach. Affognon H., A. Njoroge and L. Murdock. Presented at Purdue Improved Crop Storage Workshop: Lessons Learned in Developing and Implementing Hermetic Storage

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Affognon H., A. Njoroge and L. Murdock

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  1. Potential of PICS Bag for the Control of Larger Grain Borer (Prostephanus truncatus) - An Integrated Approach Affognon H., A. Njoroge and L. Murdock Presented at Purdue Improved Crop Storage Workshop: Lessons Learned in Developing and Implementing Hermetic Storage April 10-12, 2012 Accra, Ghana

  2. Introduction Maize Most important staple in SSA Post-harvest losses of maize in SSA are substantial Mainly due to insect pests among which the invasive Prostephanus truncatus (LGB) LGB was accidentally introduced intoAfrica some 30 years ago The pest is present in 18 SSA countries National losses of around 40% of the weight of stored grain, In individual households this can reach as high as 100%

  3. Introduction Control strategies - synthetic insecticides and fumigants Chemical control - not widely adopted - socio-economic reasons Eradication of the pest failed - beetle had already established itself in its natural forest habitat A classical biological control campaign was launched in 1991 and Teretrius nigrescens was released as a bio-control agent Objective: To assess the potential of PICS bag for controlling LGB at farm level using an integrated approach

  4. Methodology Components of the integrated approach Disinfestation of maize grains with solar energy Storing the maize in the PICS bags after the solar disinfestation

  5. Methodology Testing the integrated approach Assessing the thermal death point of adults Prostephanus truncatus with oven in laboratory Assessing the performance of PICS bag. A total of six (6) treatments were tested T1: PICS bag + solar disinfested maize (25 kg) T2: PICS bag + solar disinfested maize (25 kg) + 100 LGB (here the maize was infested and left for 4 days before solar disinfestation) T3: PICS bag + solar disinfested maize (25 kg) + 100 LGB

  6. Methodology C1: Ordinary woven polypropylene bag + solar disinfested maize (25 kg) C2: Ordinary woven polypropylene bags + solar disinfested maize (25 kg) + 100 insects in each bag C3: Ordinary woven polypropylene bag +Non solar disinfested maize (25 kg) Parameters measured: Moisture content - Oxygen and Carbon dioxide in PICS bags – Weight loss – Number of live adults and larvae of LGB – Number of live adults of Sitophilus – Germination – Aflatoxin contaminations

  7. Results Thermal death point of adults Prostephanus truncatus

  8. Results Performance of PICS bag

  9. Results Performance of PICS bag Gas (O2 and CO2) evolution in PICS bags

  10. Results Performance of PICS bag

  11. Results Performance of PICS bag Weight loss

  12. Way forward It is early to draw a conclusion, however, so far PICS bag seems to perform well The monitoring will continue Baseline data were collected on germination and aflatoxin contaminations Germination tests and aflatoxin contaminations analysis will be performed after 3, 6 and 9 months Economic analysis will be performed at the end of the experiment with price differential information that will be collected in different zones in the country

  13. Thank you for your attention

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