Resinous, evergreen trees <25m tall. Bark rough & often fissured. Bunches of green, needle-like leaves. Cones produced with many seeds.
Open places, coastal areas, slopes, shrubland. Common near plantations & shelterbelts. Maritime pine (P. pinaster) is aggressive species that tolerates harsh conditions & is the main problem in Auckland, along with more common P. radiata.
Seeds dispersed by wind & water. Regenerates well after fire.
Dominate & exclude other vegetation. Change soil acidity, precluding some native species. Older trees become canopy trees in forest.
Avoid fire. Plant tall, shady trees to inhibit germination. Create wide shelterbelt where seedlings occur adjacent to plantations. Discourage germination (& encourage native spp.) by maintaining deep humus layer. Exclude livestock.
1. Pull or dig out small plants.
2. Cut down close to ground below lowest branch. Large trees: Ring bark below lowest branches (min width 100mm). If this is not possible any branches below ring must be cut off close to trunk. Make sure cambium layer is completely cut through.
3. Cut or drill every 150mm of stem diameter & fill each cut or hole (1g metsulfuron (dissolved in approx 50ml water) or 10ml Tordon BK). All year round.
4. Spray in summer (100ml glyphosate + 20ml penetrant/10L or 5g metsulfuron + 10ml penetrant/10L or 60ml Tordon BK + 10ml penetrant/10L).
Caution: when using any herbicide or pesticide PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed.