Long-Term Cover Cropping Suppresses Foliar and Fruit Disease in Processing Tomatoes.

Autor:	Trueman CL; Department of Plant Agriculture, Ridgetown Campus, University of Guelph, Ridgetown, Canada., Awrey JC; School of Environmental Sciences, Ridgetown Campus, University of Guelph, Ridgetown, Canada., Delaporte A; Food, Agricultural, & Resource Economics, University of Guelph, Guelph, Canada., Kerr J; Food, Agricultural, & Resource Economics, University of Guelph, Guelph, Canada., Weersink A; Food, Agricultural, & Resource Economics, University of Guelph, Guelph, Canada., Van Eerd LL; School of Environmental Sciences, Ridgetown Campus, University of Guelph, Ridgetown, Canada.
Jazyk:	angličtina
Zdroj:	Plant disease [Plant Dis] 2023 Jul; Vol. 107 (7), pp. 2160-2168. Date of Electronic Publication: 2023 Jul 16.
DOI:	10.1094/PDIS-09-22-2095-RE
Abstrakt:	While links between soil and plant health are implied, there are few opportunities to empirically evaluate this due to inherent differences among sites. An exception is a long-term experiment established in 2007 (repeated in 2008) in Ridgetown, ON, where improved soil health scores and changes in soil microbial communities were observed in the medium-term with annual cover crops (CC). This led us to hypothesize that CC-induced changes in soil health might affect bacterial spot ( Xanthomonas hordorum pv. gardneri ) and anthracnose ( Colletotrichum coccodes ) development in processing tomato. Five CC treatments (no CC control, winter cereal rye, oat, radish, and mix of radish + rye) planted after winter wheat harvest were evaluated in 2019 and 2020 (CC grown nine times over 12 years). Fruit yields and net revenue were similar or greater with CC than without. In 2019, there was greater defoliation (area under the disease progress stairs = 4,370 ± 204), percent red fruit (71.0% ± 5.38), and rots (1.91% ± 0.5) in no CC than with radish (3,410, 39.1%, and 0.62%, respectively, P ≤ 0.0366), indicating earlier fruit maturity in no CC plots. Similarly, no CC had a greater incidence of red fruits with anthracnose (25.8% ± 2.89) compared with all CCs but rye (7.4 to 12.1% ± 2.89; P = 0.0029). Environmental conditions in 2020 were less favourable for disease development. Defoliation was not affected by CC treatment ( P = 0.1254), and anthracnose incidence was low (≥90.3 ± 1.22% healthy fruit), which may have limited the ability to detect treatment effects ( P = 0.2922). Long-term cover crops have the potential to produce greater or equivalent tomato yield with decreased defoliation and anthracnose fruit rot. Competing Interests: The author(s) declare no conflict of interest.
Databáze:	MEDLINE
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