Forest fires, windy and dry conditions and hot temperatures inside and outside the greenhouses has growers concerned about their tomato crops and of course other vegetables as well. The question is asked: what to do?Here is a text message I received recently:“The temperature inside my greenhouse is 30°C plus. The relative humidity is below 50 per cent. The Vapor Pressure Deficit is consistently above 12 grams/m3 of air The tomato plant headshave thinned out. The cluster set on this head is very weak. I also noticed blotchy ripening of some fruit which is more exposed to sunlight and mostly on the southside of the greenhouse. No Blossom End Rot seen yet. Did notice fruit surface cracking ona recently set cluster. Fruits are ripening faster as well. Few fruits are pointed at the end and turning red. ”
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