Table 1

Visual injury (%, 0=no injury, 100%=plant death) to selected fern species from repeated preemergence herbicide applications over a growing season. Herbicides were applied 9/8/94, and 4/10/95, and ratings made about 1 month later.

Fern Species Pend4 SS-TG Gallery Factor   Pend SS-TG Gallery Factor   Pend SS-TG Gallery Factor
    % injury 10/17/94       % injury 2/10/95       % injury 5/3/95  
Cyrtomium facatum 4 11 10 7   0 0 0 0   20 35 18 13
Dryopteris Erythosora 8 6 6 8   9 6 6 13   10 11 5 10
Drypteris marginalis 8 10 1 5   0 0 0 0   38 86 56 96
Osminda regalis 'P' 5 10 5 8   - - - -   42 47 12 10
Poly. acrost.1 6 17 20 14   0 0 0 0   54 66 36 35
Poly. poly.1 14 2 15 10   19 56 9 7   47 66 11 7
Poly. tsus.3 5 5 4 6   10 12 6 7   36 90 20 12

1=Polystichum acrostichoides, 2=Polystichum polyblepharum, 3=Polystichum tsus-sinense 4 Pend.=Pendulum @ 4lb ai/A, SS-TG=Snapshot TG @ 5 lbs ai/A, Gallery @ 1.3 lbs ai/A, Factor @ 0.75 lbs ai/A.