DIAGNOSIS, ETIOLOGY AND MANAGEMENT OF REPLANT DISORDERS IN NEW YORK CHERRY AND APPLE ORCHARDS

An overview and summary of many different experiments on replant problems of cherry and apple in New York are provided in this review, specifically: 1) Diagnosis of orchard replant disorders (ORD) by comparing growth and yield of trees with and without preplant soil treatment with nematicides and broad-spectrum biocides; 2) Diagnosis of ORD using growth-chamber or greenhouse fruit-tree bioassays; 3) Determining root disease symptoms and etiology associated with Pratylenchus penetrans and other microorganisms, alone or in combination; 4) Evaluating effects of nematicides and broad-spectrum biocide soil treatments upon fruit-tree cold tolerance; 5) Assessing the long-term (8 to 15 years) impacts of various preplant soil treatments upon orchard establishment, yield and profitability; 6) Comparing the impacts and interactions of preplant soil nutrient amendments and nematicides; 7) Evaluating the population dynamics of P. penetrans in fruit-tree roots and rhizosphere soil; and 8) Determining the host-pathogen specificity of ORD in New York.
In recent years we have concentrated increasingly on developing alternatives to chemical nematicides or broad-spectrum biocides, such as nematode-resistant cover crops, to provide effective and environmentally benign management strategies for P. penetrans and other soilborne orchard pathogens.

III International Symposium on Replant Problems

W.F. Mai, I.A. Merwin, G.S. Abawi

https://doi.org/10.17660/ActaHortic.1994.363.5