Tuesday, June 16, 2015
Spraying for scab
After some searching in the canopy, I found a few leaflets spotted with scab (photo at right). Notice that the disease seems to be confined to the youngest leaf on the terminal and the youngest leaflets on the leaf. Since scab infects rapidly growing tissues, is seems likely that scab infected this leaf during pollination season during last month's rainy period.
The point of finding scab on leaves is to verify that the disease is present and ready to infect young nuts. As the nuts start to grow in the later half of this month, they will become more susceptible to the disease. Unfortunately, the weather man has promised us and entire week of rain--great for scab, terrible for making scab sprays.