EVALUATION OF CHEMIGATION TREATMENTS ON PREMATURE VINE SENESCENCE OF PROCESSING TOMATOES IN THE SACRAMENTO VALLEY, CALIFORNIA

G. Miyao, R.M. Davis, J. Leveau
Experiments were conducted in two Yolo County commercial processing tomato fields using buried drip irrigation in 2012 as a continuation of tests from the previous year with similar treatments but different fields. In one location, K-pam was applied through the drip tape to two treatments 5-7 weeks before planting. In one of the treatments with K-pam, Serenade Soil was injected into the drip tape four times during the season. Three applications of a combination of Quadris and Ridomil, four applications of Serenade Soil, four applications of potassium sulfate, and four applications of Actinovate, all applied through the drip tape, were included. In the other location, identical treatments were applied with the exception of Actinovate. At both locations, treatments included pre-plant-incorporation of well-aged, composted chicken manure at 10 or 20 t/acre. The second location received an additional, separate treatment with a different source of chicken manure. Soil cores were periodically collected from each plot. Verticillium propagules and total culturable fungi and bacteria were enumerated. DNA was extracted for later determination of soil microbial community structure and pathogen inoculum levels. Disease incidence was assessed prior to harvest, and samples were processed in the lab to determine the disease-causing organisms. At one site, Verticillium wilt was widespread. At the second site, root knot nematode was prevalent; Verticillium and Fusarium wilts as well as Fusarium crown and root rot were common. Yields were generally increased in the plots with shallowly incorporated chicken manure but the incidence of disease was generally not affected by any treatment.
Miyao, G., Davis, R.M. and Leveau, J. (2015). EVALUATION OF CHEMIGATION TREATMENTS ON PREMATURE VINE SENESCENCE OF PROCESSING TOMATOES IN THE SACRAMENTO VALLEY, CALIFORNIA. Acta Hortic. 1069, 159-165
DOI: 10.17660/ActaHortic.2015.1069.22
https://doi.org/10.17660/ActaHortic.2015.1069.22
processing tomato, chemigation, composted manure, premature vine decline
English

Acta Horticulturae