Hello,
I need your opinon about pest which is causing damage on apple fruit. It is usually a hole with the cavity underneath. There are no excrements nor on fruit surface close the hole neither in the cavity.This particular orchard was treated by mating disruption and several times treated by CpGV. Me and my colleagues have theory that damage was caused by Cydia pomonella. Caterppillars were infected by CpGV but they were still able to caused some damage. On the other hand I´m not 100% sure about this theory. There were no signs of such damage in July. So it was caused in August. There is also a gradient of damage % with direction from nearby organic vineyard. Usually there are more such holes in one fruit.
Does somebody have idea which pest could possilby cause this damage?
Thank you.
There are two options:
1. CM -Cydia pomonella
Or the most probable Grapholita molesta....
As usually CM (Cydia Pomonella) basically is damaging seeds of apples and have just one hole, OFM (Grapholita molesta) damage only pulp of fruits and makes several holes..
Please check it... I think this is OFM...
I think these symptoms are not the result of a pest but it could be attributed to physiological disorder such as the emergence of bitter pit in apples due to lack of calcium or the relationship between potassium and calcium, leading to atrophy in parts of the fruit.
It needs analysis of Fruit tissue
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