Purpose: To determine whether Fusilade, Poast, and CGA 24275, can be safely used as over-the-top treatments in ornamentals to control weedy grasses
Procedure: Plants were grown in containers and sprayed with herbicides at approximately 1 month intervals with a hand held small plot sprayer at 30 psi in a volume of 36 gallons/acre. Plants were assessed visually 1 month after each application using a scale of 0-10 where 1 equals no injury and 10 equals death.
Experimental Design: Completely randomized with 3 replications
Applications: 11 May 1983 — sunny, 70 F, soil dry, wind less than 5 mph 18 June 1983 — foggy, 65 F, soil dry, wind 5 mph
Treatments:
Control (Con)
Fusilade .5 #ai/A + .25% X77 (Fus. 5)
Fusilade 2.0 #ai/A + .25% X77 (Fus. 2)
Poast 1.0 #ai/A + oil* (Po 1)
Poast 2.0 #ai/A + oil* (Po 2)
CGA 24275 1 #ai/A + oil* (CGA 1)
CGA 24275 2 #ai/A + oil* (CGA 2)
| June 13, 1983 | July 15, 1983 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Species | Con | Fus | Po | CGA | Con | Fus | Po | CGA | ||||||
| 0.5 | 2.0 | 1 | 2 | 1 | 2 | 0.5 | 2.0 | 1 | 2 | 1 | 2 | |||
| Ajuga reptans | 1.7 | 1.0 | 0.0 | 0.3 | 0.3 | 0.3 | 0.3 | 0.7 | 0.3 | 0.3 | 0.7 | 0.3 | 0.0 | 0.7 |
| Arbutus unedo | 1.0 | 0.7 | 0.3 | 0.0 | 0.3 | 1.0 | 0.7 | 1.3 | 0.7 | 0.3 | 0.7 | 1.0 | 1.0 | 0.7 |
| Arenaria verna | 2.3 | 5.0 | 2.0 | 2.3 | 0.0 | 2.0 | 0.0 | 1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Asparagus densiflorus ‘sprengeri’ | 0.0 | 0.3 | 0.7 | 0.7 | 0.7 | 0.7 | 1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Campanula carpatica | 0.0 | 1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 | 0.0 | 0.3 | — | 0.0 | 0.0 | 0.0 |
| Cerastium tomentosum | 5.3 | 3.7 | 5.0 | 6.0 | 6.3 | 5.7 | 5.0 | 6.3 | 5.7 | 5.7 | 7.0 | 6.7 | 6.7 | 6.3 |
| Eucalyptus citriodora | 0.7 | 0.0 | 0.0 | 0.3 | 0.7 | 0.7 | 0.3 | 0.0 | 0.0 | 0.7 | 1.0 | 1.0 | 2.0 | 0.0 |
| Eucalyptus nicholii | — | — | — | — | — | — | — | 0.3 | 2.3 | — | 1.0 | 2.7 | 1.0 | 0.0 |
| Euryops pectinatus | 0.3 | — | 0.0 | 0.0 | 0.7 | 0.7 | 0.0 | 0.0 | 0.0 | 0.3 | 0.0 | 2.7 | 0.0 | 0.0 |
| Gazania ringens ‘Ieucoleana’ | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 | 1.0 | 0.3 | 0.3 | 0.5 | 0.3 | 0.0 |
| Geijera parviflora | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 | 0.0 | 1.3 | 0.0 |
| Hedera helix | 0.3 | 0.0 | 0.0 | 0.3 | 0.7 | 0.7 | 0.3 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 | 0.3 |
| Herniaria glabra | 0.0 | 0.7 | 1.0 | 1.0 | 0.7 | 1.0 | 1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Juniperus chinensis ‘Hetzi’ | 0.0 | 1.0 | 1.7 | 0.3 | 0.3 | 0.7 | 0.5 | 0.0 | 0.0 | 1.0 | 0.0 | 0.0 | 0.0 | 1.7 |
| Juniperus horizontalis ‘Bar Harbor’ | 0.7 | 1.3 | 3.0 | 0.3 | 0.7 | 2.0 | 5.0 | 0.7 | 5.3 | 7.7 | 1.7 | 0.0 | 5.7 | 7.7 |
| Juniperus scopulorum ‘Witchita Blue’ | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.0 | 0.0 | 0.0 | 0.0 | 1.0 |
| Juniperus wiltonii | 0.0 | 0.0 | 1.0 | 0.3 | 0.0 | 0.0 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Leptospermum laevigatum | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.7 | 0.0 | 0.0 | 0.7 | 0.0 | 0.0 | 0.0 |
| Ligustrum japonicum | 1.3 | 0.7 | 1.3 | 2.3 | 0.7 | 1.0 | 1.0 | 7.5 | 1.3 | 5.3 | 8.0 | 3.7 | 4.7 | 5.0 |
| Liquidambar styraciflua | 0.3 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Lonicera japonica | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.7 | 1.0 | 0.7 | 0.0 | 0.3 | 0.7 | 0.3 |
| Lysimachia nummularia | 0.0 | 0.0 | 0.0 | 0.7 | 0.0 | 0.0 | 0.3 | 0.0 | 0.0 | 0.3 | 0.3 | 0.0 | 0.0 | 0.0 |
| Metrosideros excelsus | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Nandina domestica | 0.3 | 0.7 | 1.3 | 1.0 | 0.7 | 1.0 | 1.7 | 0.0 | 0.7 | 0.3 | 0.7 | 0.3 | 0.0 | 0.7 |
| Nerium oleander | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.7 | 0.0 | 1.0 |
| Ophiopogon japonicus | 0.0 | 0.0 | 1.0 | 0.0 | 0.3 | — | 1.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Pelargonium domesticum | 0.3 | 0.3 | 0.7 | 0.0 | 0.7 | 0.7 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Photinia fraseri | 0.3 | 0.0 | 0.3 | 0.0 | 0.3 | 0.3 | 0.3 | 0.7 | 0.0 | 0.3 | 0.0 | 0.0 | 0.7 | 0.0 |
| Polygonum capitatum | 3.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 2.0 | 1.5 | 1.5 | 2.0 | 2.0 | 1.5 |
| Potentilla verna | 0.7 | 3.0 | 2.0 | 2.7 | 1.7 | 3.0 | 1.0 | 0.7 | 1.0 | 1.0 | 1.3 | 0.7 | 1.0 | 1.0 |
| Salix matsudana ‘tortuosa’ | 1.0 | 1.3 | 1.0 | 1.3 | 1.5 | 0.3 | 0.7 | 0.0 | 0.0 | 0.7 | 0.0 | 0.0 | 0.0 | 0.3 |
| Sedum × rubrotinctum ‘Christmas cheer’ | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.7 | 0.5 |
| Spirea Vanhouteii | 0.0 | 0.0 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.5 | 1.0 | 0.0 | 0.7 | 0.5 | 2.0 | 0.0 |
| Syzgium paniculatum | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.7 | 0.0 | 0.0 | 0.7 | 0.0 |
| Vinca minor | 0.3 | 1.3 | 1.0 | 0.7 | 1.0 | 1.0 | 0.7 | 0.7 | 0.7 | 0.3 | 0.7 | 0.3 | 0.7 | 1.0 |
↵*0 = no injury, 10 = death
Injury Ratings*
Footnotes
↵* 1 quart/100 gallons
- © 1984, International Society of Arboriculture. All rights reserved.
