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
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 - PowerPoint PPT Presentation
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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
MaizeMost 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)
Introduction
LGB was accidentally introduced into Africa 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%
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
Introduction
Objective: To assess the potential of PICS bag for controlling LGB at farm level using an integrated approach
Components of the integrated approach
Disinfestation of maize grains with solar energy
Storing the maize in the PICS bags after the solar disinfestation
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
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