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INTRODUCTION J 1 GLASSHOUSE CROPS RESEARCH AND EXPERIMENTAL STATION
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air temperature aphids applied autumn average benomyl calcium caused chloropicrin chloroxuron chrysanthemums compared concentration cucumbers cultivars damage determined disease dry matter Dutch effect experiment fertiliser flower fluorine freesia fresh weight fruit set fruit weight fungicides Fusarium germination gherkins glasshouse Glasshouse Climate Glasshouse Crops glasshouse soil growers growing grown growth harvest heating horticultural increased infection inoculation investigation irrigation water kg/plant Klapwijk Kora leaf lettuce litre manganese method mevinphos mixture molybdenum Naaldwijk nitrogen normal number of fruits nurseries nutrient nutrition obtained pasteurisation peat peppers period pipe plant density plant raising plant weight plots Poeldijk pot wall potash potting compost produced Roorda van Eysinga root salt samples seed seedlings showed Sonneveld South Holland sowing date sown sphagnum sphagnum peat spray steam sterilisation sub-irrigation symptoms tested thiophanate-methyl treatment trial triple superphosphate truss untreated Venlo virus volume extract yield young tomato plants