1. An apple mildew assessment method for use in supervised control;Butt;Report of East Malling Research Station for 1978 (Grower's Bulletin),1979
2. The management of apple powdery mildew: a disease assessment method for growers;Butt,1979
3. Decision-based management of orchard pathogens and pests in the United Kingdom;Butt,1982
4. Supervised control of apple pests in the United Kingdom;Carden,1977
5. Acaricide field trial;Cranham;Report of East Malling Research Station for 1977,1978