Screening spruce for white pine weevil resistance

• Project description
• Distribution of P. strobi in North America
• Genetic variation in canadian weevil populations
• Range of Sitka spruce
• Sources tested for resistance in Western North America
• White pine weevil resistance screening trials
• Mass screening for resistance (Jordan River plantation)
• Ghost trial: studies using caged insects clarified the mating system of weevils
• Artificial wounding studies: Studying plant defenses
• Insect - plant relationships
• Are weevil resistant trees also resistant to other insects?
• Conclusions
• Selected references

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Sources tested for resistance in Western North America

Screening for resistance

 

John King, G. Kiss, Barry Jaquish, and Cheng Ying of the British Columbia Ministry of Forests collected seed from potentially resistant trees throughout the range of Sitka spruce, a coastal species and from several locations for interior spruce (Sitka x White hybrids).

Spruce screening trials

Seed collected was planted in 14 trials from British Columbia to Oregon, and screened by Canadian Forest Service personnel. Additional test sites were planted in Washington state, but these have not yet been evaluated.

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