1998 – Current Pest Report – Apple Blotch leafminer

Tree stage:
3/28/98 – green tip
4/1/98 – half inch green
4/14/98 – tight cluster
4/21/98 – loose cluster
4/29/98 – early bloom

Apple blotch leafminer trap captures

The average number of adult leafminers caught per trap in each monitored block. The averages are cummulative.
* Threshold = 8/trap by tight cluster or 21/trap by pink*

orchard 4/6/98 4/13/98 4/20/98 4/27/98 5/4/98
Steere 1.2/trap 2.4/trap 7.4/trap
Piti 60/trap 110/trap 140/trap
Jaswell .2/trap 4.2/trap
Smith 29/trap 150/trap 250/trap
Phantom 88/trap 130/trap 160/trap
Hill .4/trap 13/trap 44/trap 52/trap
Barden 3/trap 5/trap
Phillips 1.4/trap 4.2/trap 7/trap
Dermksian 0/trap 0/trap .25/trap
Lamore 0/trap 1/trap
East Farm .25/trap 1.3/trap 3.3/trap

Egg counts:

 

Steere: 0 eggs on 33 clusters (checked every leaf on cluster – about 200 leaves)
Smith: 49 eggs on 5 clusters
Hill: 5 eggs on 19 clusters
Barden: 0 eggs on 9 clusters

Threshold????? I guess it to be about 1 – 2 eggs per cluster