Work

Effects of tillage, cultivar and fungicide on Phomopsis longicolla and Cercospora kukuchii in soybean

Year: 2015

Type: article

Abstract: It has become a standard practice for farmers to use a no-till production system where crop residues are left on the soil surface rather than incorporated into the soil. This practice helps reduce soil erosion , conserve energy, increase soil moisture, and reduce erosion. However, many plant pathogens survive in the previous year's crop residue, increasing disease risk in reduced-tillage systems. The effect of tillage on seed borne diseases has not been objectively evaluated in side by side comparisons of till and no-till culture. We evaluated the impact of tillage and foliar fungicide on percent seed infection by Phomopsis Seed Decay (PSD) and Purple Seed Stain (PSS) over 4 years at the Milan Research and Education Center, Milan, TN. Analysis of variance indicated there was no significant difference ( P ≤ 0.05) in PSD and PSS infection due to tillage. However, there was a significant interaction between fungicide and tillage where fungicide significantly reduced PSD in tilled but not in no-till plots. On the contrary, PSS increased in both tilled and no-till plots with fungicide application. These results suggest that fungicide programs under both till and no-till systems may alter the level of severity of these two seed borne diseases and may require further research to minimize the risk.

Source: Crop Protection

DOI: 10.1016/j.cropro.2015.03.022

Authors: Alemu Mengistu, Heather M. Kelly, Prakash R. Arelli, Nacer Bellaloui

Institutions: Agricultural Research Service, United States Department of Agriculture, University of Tennessee at Knoxville

Language: English

Topic: Fungal Plant Pathogen Control

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDGs: Zero hunger, Life on land

Open Access status: hybrid

Estimated APC paid: $4,360