![]() Native to Europe, this beetle was released widely in New Zealand during the 1990s.Care must be taken while doing this as psyllids are fragile and spend most of the year immobile.The best way to do this is to collect nymphs from November-October by cutting infested shoots and carefully placing cut material onto uninfested broom bushes Manually spreading the psyllid is beneficial as they only disperse slowly.When eggs are laid they are embedded in the stem, protected by a waxy covering.They are 2-3 mm long, pale brown and winged. The following spring, nymphs emerge, developing though five stages and becoming adults by late spring The insect produces one generation per year with the adult female laying eggs from late spring to early summer.Now established at many sites throughout New Zealand, both adults and nymphs suck sap out of new growth in spring Native to Europe, this insect was released extensively in the 1990s.Broom psyllid ( Arytainilla spartiophila) Several insects have been introduced into New Zealand as biological control agents for broom. Chemical control can be used along with cutting for effective control of broom.ĪLWAYS READ PRODUCT LABELS BEFORE APPLYING Active ingredientĬonsult your farm consultant, industry rep or the New Zealand Agrichemical Manual for more information about chemical control.Cutting is not always possible as broom can grow on inaccessible hillsides and valleys.Cutting can be used in combination with herbicides.Broom can be ploughed, slashed and pulled with chains towed by bulldozers.Slashing broom in spring followed by burning in autumn gives more effective control.Burning reduces broom numbers although plants can re-establish from seedlings in bare areas.Spreading ryegrass and clover with fertiliser can help a pasture to outcompete broom seedlings which establish after burning a mature broom stand.Maintaining a dense, vigorous pasture will help to prevent broom re-infestation.Pasture species/cultivars and fertiliser application ![]() The combination of pasture competition, trampling and grazing can severely reduce seedling numbers.Intensive grazing of broom seedlings can significantly reduce the number of plants that establish Sheep and goats readily graze broom seedlings which can help reduce establishment of the weed.While not as common in New Zealand as broom, Montpellier broom is still invasive and competes with native plants.When seed pods explode they can disperse seeds up to 5 m away from the parent plant ![]()
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