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5. Sustainable Agriculture


                     Climate impact on crops





                 ↑  or ↓ rainfall                        ↑  temperatures                        High humidity               ↑  sea levels and
                                                                                                                            salinity in soil
    Lettuce      •    ↑ destruction of crop in open fields  •  Wilting and heat stress          •   Rapid growth rates
    (St Lucia)   •    soil erosion and landslides on     •    Early maturation and ↓ crop       •   Tip burn
                      elevated areas                          duration                          •   Calcium deficiencies
                                                         •    Unusable crops: due to bolting,
                                                              loss of colour and bitterness

    Cabbage      As above                                •    Decline in seed production        ↑ Pests: cabbage budworm,
    (St Lucia)                                           •    Lower dry matter content          cabbage looper, cabbage wh
                                                         •    Lower yields                      ite butterfly, diamond back
                                                                                                moth, fall armyworm and
                                                                                                leaf miners

    Bell         As above                                •    Vulnerable to pest infestations   Late Blight, Fusarium Wi    Crop does not
    Peppers                                                   due to high transpiration rates in   Bacterial Wilt           perform well in
    (St Lucia)                                                germination and transplanting                                 saline conditions

    Tomato       •    Impacted by drought conditions     •    Require high lands that are lower
    (St Lucia)   •    Risk of flooding                        in temperature

    Sweet        •    Less impacted by hurricanes        Positive change:
    Potato            (underground)                      •    Increased biomass (32-37%) with
    (St Lucia)   •    Can be grown on marginal ground         2.8% increase in temperature
                 •    Increases potato weevil will impact   •  Increased yields (2050 and 2070 St
                      yields particularly in droughts         Lucia CARIBSAVE climate model
    Dasheen      •    High moisture plant will not tolerate                                                                 Negative impact
    (St Lucia)        drought well (high stress)

    Sustainable Agriculture in the Caribbean (SAC) Project

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