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Lentil disease concerns

Lentil disease concerns. Dr. Mary Burrows Montana State University, Bozeman, MT mburrows@montana.edu 406-994-7766. The majority of this presentation is directly attributable to Michael Wunsch, NDSU-Carrington. LENTILS. There are five major foliar diseases of lentils in North Dakota.

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Lentil disease concerns

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  1. Lentil disease concerns Dr. Mary Burrows Montana State University, Bozeman, MT mburrows@montana.edu 406-994-7766

  2. The majority of this presentation is directly attributable to Michael Wunsch, NDSU-Carrington

  3. LENTILS There are five major foliar diseases of lentils in North Dakota. ASCOCHYTA – caused by Ascochytalentis ANTHRACNOSE– caused by Colletotrichumtruncatum BOTRYTIS GRAY MOLD – caused by Botrytis cinerea and B. fabae SCLEROTINIA STEM ROT (WHITE MOLD) – caused by Sclerotiniasclerotiorum STEMPHYLIUM BLIGHT – caused by Stemphyliumbotryosum

  4. Ascochyta blight • Three different species on Pea • Ascochytapisi, A. pinoides (Mycosphaerellapinoides), Phomamedicaginisvar.pinodella (formerly A. pinodella) • Different species on Lentils and Chickpeas • Lentil = Ascochytalentis • Chickpea = Ascochytarabiei • Spread by water splashing and wind • 60 – 75 F, humidity and rain

  5. Montana Ascochyta seed testing • *Planting year • Action threshold = 0% chickpea, 0.7% pea, 2% lentil • Where ‘action’ means seed treatment for ascochyta or not planting that seed • Action threshold is based on relative resistance of the crop to the disease

  6. Ascochyta blight symptoms: chickpea Leaf symptoms Pycnidia (fungal spore structures) Fungicide No fungicide Photo: Chengci Chen, Karnes Neill, MSU

  7. Ascochyta blight symptoms: Pea, Lentil Photo: S. Markell, NDSU Photo: S. Markell, NDSU

  8. Bacterial blight of pea Angular lesions Watersoaking and ooze Hail damage

  9. LENTILS Easily confused Anthracnose Ascochyta E

  10. LENTILS Lentil anthracnose Foliar lesions: A Stem lesions: B Much more damaging than Ascochyta. Not yet found in MT, but I’m sure it’s here.

  11. LENTILS Lentil anthracnose • Lesions girdle stems, killing plants • Causes dead spots within fields • Infected seeds are discolored

  12. LENTILS Stemphylium blight A problem when rains occur at mid- to late-bloom

  13. LENTILS Stemphylium blight

  14. LENTILS Stemphylium blight – importance/impact Impact on seed yield and quality in ND and MT is not known. Mottled seed discoloration was associated with Stemphylium:

  15. Lentil diseases

  16. Disease Resistance in Lentil Varieties

  17. Good crop rotation practices • 3-4 year rotation between legume crops is recommended for disease management • Should reduce root pathogen population: particularly the Fusarium species that attack legumes • Will also reduce inoculum for foliar pathogens

  18. Lentil with root rot Healthy lentil Photo: S. Mills, MSU

  19. Diagnostic lab: routine functions and agricultural biosecurity • Process approximately 2000 samples/yr (~80% homeowner/horticulture) • Free to you • 100% grant funded staff, supplies, travel • Space and utilities provided by MSU • Sample submission is important • Good sample = good answer

  20. Network Responsibilities • Data collection (detectors/diagnosticians) • Communications system • Information storage and management • Data analysis • New events and analysis of new appearance • Pattern recognition • Unusual patterns of endemic problems • GIS • Event propagation • Tracking • Reporting and alerts • Link to State Departments of Ag and US regulatory agencies

  21. Acknowledgements NDSU: M. Wunsch, S. Markell, R. Goswami MSU: D. Ito, M. Moffet, Z. Miller, L. Skoglund, L. Newman MSU County Extension Agents USPEST.ORG

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