Hi Viv, how old the plants are? And did you apply any nutrients? I think it could be a nutrient deficiency. Sevin is an insecticide should be used only when you notice insect pests. Please provide more information along with a few more images.
http://www.omafra.gov.on.ca/IPM/engli...
http://www.agroservicesinternational....
Manganese deficient beans
Iron deficiency in beans
Posted
by: Dr. Ravishankar Narayana
(15 points)
Posted: July 15, 2017
0 Comments