By: Brent Flaten, PAg. CCA, Integrated Pest Management Specialist
In some areas where there has been a lot of moisture in the past couple of weeks, people may see chlorotic speckling of lentil leaves (see figure 1). This is not caused by a pathogenic organism but is a physiological reaction to prolonged wet weather causing rupturing of cell walls.
There are several theories on how this may impact the plant. A lack of oxygen in the root zone and the inability of the plant to absorb some nutrients are commonly cited under these conditions. Other symptoms can include yellowing of leaves due to water stress (see figure 2), resulting in leaf drop.
These symptoms may or may not appear at the same time as actual disease symptoms such as various root rots where roots are tan to brown and affecting plant health in general, or leaf diseases such as ascochyta or anthracnose. If plants are not showing any symptoms of actual diseases, warm sunny dry conditions will help most plants out-grow the chlorotic speckling.