Start clean: Tips for a greenhouse free of pests and diseases

摘要

Reoccurring problems with diseases such as Pythium root rot or insects such as fungus gnats and shore flies may indicate that your greenhouse and potting areas need a good cleaning. Clean and disinfect when greenhouses are empty to eliminate overwintering sites for pests and reduce their populations prior to the growing season. Greenhouse pests overwinter in weeds and protected areas in unheated greenhouses. Once cleaned and disinfected, if possible, allow the greenhouse a fallow period of four weeksto reduce pest populations.