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Home → Publications → National Nursery Proceedings → 1992 → Effective Control of a New Woolly White Fir Nursery Aphid (Homoptera: Aphididae)

Effective Control of a New Woolly White Fir Nursery Aphid (Homoptera: Aphididae)

Damage by a woolly fir aphid (Mindarus sp. nr. victoria Essig [Homoptera: Aphididae]) was first reported in white fir (Abies concolor [Gord. & Glend.] Lindl.) nursery beds at Placerville, California, in 1987. The 47% cull rate attributed to this aphid resulted in a to- tal loss of $204,000 (nursery plus site preparation cost). To reduce aphid damage to nursery seedlings, 11 different in- secticide formulations were tested for aphid control during 1988 and 1989. One application of acephate, chlorpyrifos, diazinon, dimethoate, esfenvalerate, cyfluthrin and fluval- inate in the Spring significantly reduced aphid infestations until midsummer. Two applications of acephate, chlor- pyrifos, diazinon, dimethoate, and fluvalinate were effect- tive in reducing aphid populations throughout the growing season. Carbaryl, azadirachtin, and soap were apparently not effective against this aphid in the nursery environment.


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Author(s): John D. Stein, Canine R. Trummer

Publication: National Nursery Proceedings - 1992

Event: Western Forest Nursery Association
1993 - Fallen Leaf Lake, CA