WEST VIRGINIA APPLE CROP PROFILE
 Dogwood borer, Synanthedon scitula (Harris): Dogwood borer has
become a recent problem in some orchards on dwarfing rootstocks by feeding in Aburr knots@ (adventitious root primordia)
that can result in tree girdling and death.Chemical control: Pheromone traps are used to time insecticide applications directed at the lower trunk region of trees to prevent larval infestation of Aburr knots@. |
|
|
Amount used |
|
Insecticide |
% of acres treated |
lb a.i./acre/application |
lb a.i./acre/year |
Chlorpyrifos |
2 |
1.0 |
1.0 - 2.0 |
Cultural control: Incidence of dogwood borer can be reduced by the removal of spiral-wrap and other types of tree trunk guards which promote
Aburr knot@ formation and prevent spray coverage. Mounding soil around the trunk to cover Aburr knots@ will also prevent infestation.