Links to other websites with information about lentil diseases some of which have been included here:
Weidong Chen, Hari C. Sharma, Fred J. Muehlbauer, 2011. Compendium of Chickpea and Lentil Diseases and Pests. The American Phytopathological Society.
K.L. Bailey, B.D. Gossen, R.K. Gugel, R.A.A. Morrall, 2003. Diseases of Field Crops in Canada. The Canadian Phytopathological Society.