Whitefly is a serious pest of greenhouse crops.  It can severely damage plants and is hard to control.  The adult flies are covered in a protective layer of white wax.  They fly up in clouds from plants when disturbed.  They suck plant sap, spreading plant viruses and depositing sticky honeydew which attracts black sooty moulds … Continue reading Whitefly and Greenhouses (Horticulturalist Peter Whyte gives advice)