TABLE 2.1–Incubation times for 6 taxa of Arceuthobium from infection to production of the first shoot
Percent of inoculations producing shoots
Arceuthobium 1 yr 2 yrs 3 yrs 4 yrs 5 yrs 6 yrs 7 yrs 8 yrs 9 yrs 10 yrs 11 yrs 12 yrs

A. abietinum f. sp. concoloris 0 0 19 31 12 9 11 9 3 3 0 3
A. abietinum f. sp. magnificae 0 0 39 25 11 9 4 6 3 3 0 0
A. americanum 0 2 32 34 19 8 4 1 0 0 0 0
A. campylopodum 0 0 23 62 11 4 0 0 0 0 0 0
A. tsugense subsp. tsugense 0 51 33 6 6 6 0 0 0 0 0 0
A. varginatum subsp. cryptopodum 0 1 30 32 30 4 2 1 0 0 0 0

Note: Data for A. abietinum f. sp. concoloris and f. sp. magnificae from CA (Scharpf and Parmeter 1982), A. americanum from CO (Hawksworth and Johnson 1989), A. campylopodum from CA (Wagener 1962), A. tsugense subsp. tsugense from BC (Smith 1971), and A. vaginatum subsp. crytopodum from AZ (Hawksworth 1961a).

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