Purple guava is a large erect shrub or small tree <6m tall. Smooth, oval leaves <5cm long. White flowers (Jun-Mar). Round, dark purple, edible fruit (Jun-Aug).
Yellow guava is a small tree, growing to c. 3m, with smooth bark. Has larger leaves, densely hairy when young; fruit 3-4 cm diam, yellow, with sweet pink flesh.
Near old orchards, roadsides.
Seeds spread by larger birds.
Aggressive invaders in other Pacific islands incl Raoul. Can form thickets with dense mats of roots that make it difficult for other species to coexist.
Follow up for seedlings 2-3 times per year until eradicated. Control possums & pigs. Do not replant sites until clear. Where possible, attempt to eliminate seed source from gardens.
1. Pull or dig out small plants.
2. Cut & stump paint (1g metsulfuron/1L or 100ml Tordon BK/1L or triclopyr undiluted).
3. Cut & squirt: make 1 cut per 100mm stem diameter & fill each cut with 1g metsulfuron (dissolved in approx 50ml water) or 10ml Tordon BK. All year round.
4. Spray all year round (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.