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Diagnosis Case: Spruce
| Other insects that may be present on spruce include the Yellowheaded Spruce Sawfly and the Spruce Budworm. Besides noting physical characteritics (as seen in the pictures below), use the table below to determine what times and stages these insects are present. |
Yellowheaded Spruce Sawfly  |
Spruce Budworm  |
| Type of Insects | No. of Generations | Insect Stage | Time they are present | Spruce Spider Mites | 6+ in hot summers | Larvae | first emerge in May - June |
| Nymphs | shortly after larvae emerge | ||
| Adults | shortly (6-10 days) after nymph stage | ||
| Yellowheaded Spruce Sawfly | 1 | Larvae | mid June - early July |
| Adults | May - early June | Spruce Budworm | 1 | Larvae | 1) hatch in late summer & stay protected for winter in cacoon 2)emerge in early spring to feed |
| Adult | early July - early August | ||
Back to Spruce Diagnosis
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