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Susceptibility of Juniperus spp. cultivars and other Cupressaceae in California to the cypress tipminer, Argyresthia cupressella.

Least susceptible, about 1/2 to 2-1/2 tipminers
Juniperus chinensis 'Kaizuka,' J. chinensis var. sargentii 'Glauca,' J. scopulorum 'Erecta Glauca,' Thuja plicata

Moderately susceptible, 5 to 8 tipminers
J. chinensis 'Pfitzerana Aurea,' J. sabina 'Arcadia,' J. sabina 'Tamariscifolia,' J. virginiana 'Prostrata'

More susceptible, 13 to 19 tipminers
Chamaecyparis lawsoniana 'Allumii,' Juniperus chinensis 'Pfitzerana,' J. chinensis 'Robust Green,' J. virginiana 'Cupressifolia'

Most susceptible, about 40 tipminers
Thuja occidentalis

Numbers are cypress tipminer larvae per 3.5 oz (100 grams) of foliage.

Foliage browning from cypress tipminer feeding.
Foliage browning from cypress tipminer feeding.

Source: Koehler CS, Moore WW. 1983. Resistance of several members of the Cupressaceae to the cypress tipminer, Argyresthia cupressella. J. Environ. Hort. 1:87–88.

Statewide IPM Program, Agriculture and Natural Resources, University of California
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