Tree Removal Methods
Manual, Mechanized, and Chemical
Manual Felling
• Not always practical if large numbers of trees must be removed
• Can damage residual trees
Brushsaw for small stems, brushChainsaw
Tree Girdling
• Double girdle 1 in. deep spaced ~ 6 in. apart
• Later winter, early spring during sap rise
• Diffuse porous species are poor candidates unless herbicide is used
Mechanized Felling
• Mechanized removal– Tracked feller buncher
• Rotating cab with hinged arm
• Steep, uneven terrain
– Hydrostatic feller buncher• Easily maneuverable
• Plantations
– 3-wheeled feller buncher• Lightweight
• Flat terrain
Mechanized Removal
• Brush Hog
– Small trees and brush
Herbicides
• Why herbicide?
– Effective kill of whole plant with no resprout potential
• Uses– Precommerical thinning
– Release treatments
– Improvement cutting
– Site preparation
– Control of invasive species
– Right-of-way maintenance
Herbicide Application Methods
• Cut surface treatments– Frill girdle (Hack and squirt)
– Stem injection
– Cut stump
• Bark, foliage, and soil treatments– Foliar spray
– Basal bark application
– Basal soil spray
Herbicide Types
• Amine formulations (water-based)
– Water used as “carrier”
– Foliar spray, cut surface• Herbicide label will specify mixture for given application and target species
– Common chemicals: • Glyphosate: Roundup, Accord
• Triclopyr: Garlon 3A
• Picloram: Tordon K, Pathway
• Imazapyr: Aresenal
• 2,4-D
Herbicide Types
• Ester formulations (oil-based)
– Basal oil, diesel, or kerosene used as “carrier”
– Cut surface, basal bark• Herbicide label will specify mixture for given application and target species
– Common chemicals: • Triclopyr: Garlon 4
Cut surface treatments
Bark, foliage, and soil treatments
Silvicultural Objectives and Chemical Control Methods
Silvicultural Objectives and Chemical Control Methods
Silvicultural Objectives and Chemical Control Methods
Silvicultural Objectives and Chemical Control Methods
Silvicultural Objectives and Chemical Control Methods