Table 1 Summary of the PHL reduction interventions evidence-base for SSA and South Asia

From: A scoping review of interventions for crop postharvest loss reduction in sub-Saharan Africa and South Asia

 

Technically effective interventions

Critical gaps in the evidence-base

Technologies, tools and equipment

Handling practices

Cereals

Maize storage: in hermetic containers or admixed with some synthetic chemicals or DEs

Wheat, rice or sorghum storage: in hermetic containers or underground pits, or admixed with some synthetic chemicals, botanicals or DEs

Timely harvesting, protecting crops from direct ground contact while drying

• Interventions for loss reduction in the non-storage activity stages

• Any evaluation of training, policy, infrastructure, finance interventions on loss reduction

• Effects of sanitation, grain cleaning and timing of activities on subsequent losses

• Verified measured socio-economic or environmental outcomes of the uptake of different PHL reduction interventions at any scale

• Factors facilitating and constraining the adoption of PHL reduction interventions

• Stakeholder participation in the study of interventions to facilitate co-innovation and co-learning, and the need for more real-world scale on-farm participatory studies

• Standardized loss measurement metrics

• Consistency of intervention results confirmed through multiseason and multilocation studies

Legumes

Storage in hermetic containers or admixed with synthetic chemicals, botanicals, DEs or edible oil

Protecting crops from direct ground contact while drying, sorting to remove mouldy grains

Roots and tubers

Use of digging tools that reduce harvesting damage, use of improved storage containers, ventilated storage, evaporative cool storage, cold storage, sprout suppressants

Piecemeal harvesting, curing, sorting to remove damaged roots or tubers, avoidance of rough handling, use of maturity indices

Fruits

Harvesting poles/pickers, use of improved packaging, waxing (alone or with fungicides or botanicals), hot-water treatments, evaporative cool storage, cold storage, ripening treatments

Use of maturity indices, gentle harvesting and handling, sorting to remove damaged fruits

Vegetables

Use of improved packaging, evaporative cool storage, ventilated storage (onions), cold storage

Gentle handling, curing (onions)

  1. The interventions for which sufficient evidence existed of their efficacy in reducing PHLs are listed for each crop group. These interventions were either of the technologies/tools/equipment type or of the handling practices type, and they predominantly focused on reducing losses during the crop storage stage. Critical gaps identified in the evidence base for all crop groups are listed in the final column.