What the weather is doing to the crop

• Kaduna · Kano

  August humidity and maize lesions

  Wet nights after a dry spell are when northern blight jumps rows. Scout the lower leaves at first light, not after the market run. If lesions are long and grey-brown, treat before Thursday rain — waiting for an extension visit usually means the stand is already gone.

• Enugu · Lagos

  When the Lagos maize premium is real

  A ₦4,000 bag gap looks like money until you price diesel and the two-day wait at the park. If the spread after transport is thinner than a full tank, hold. Cooperatives that sold on the first aggregator offer in July left more on the floor than they saved in haste.

• Oyo

  Phosphorus on tomato after a sandy rain

  Purple undersides and stalled fruit set after a hard rain usually mean the dressing washed. Split SSP, mulch the bed, and do not chase it with more nitrogen. Recheck the same plants in ten days — not the next village rumour.

Longer pieces live in the journal.