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The Department of Conservation (Doc) will receive $3.6 million of that and Land Information New Zealand $1.7 million, money that Conservation Minister Steve Chadwick said would be "ongoing".
The money would be spent on combating wilding pines, gorse, broom, rabbits, goats and possums and would boost regional pest management strategies run by regional councils and communities.
Between them, Doc and Land Information New Zealand (Linz) have previously spent $3 million a year supporting regional pest management strategies.
Ms Chadwick said in addition to the $3.6 million of new money, Doc spent $49 million a year managing pests on high value conservation land.
Doc was one of the country's largest land managers, but its level of weed and pest control has concerned neigh-bours, with many feeling they do not do enough, particularly in the high country.
Figures released last year show Doc manages 6.5 million ha, or 42%, of the South Island land mass, and two million ha of the North Island, or 17%.
Overall, 31% of New Zealand is managed by Doc, an estate that was growing.
Linz figures released last week reveal Doc had gained an extra 178,000ha of the South Island high country to manage as a result of tenure review of Crown pastoral lease land, or 48% of land that has gone through the process.
Lessees have been able to freehold 194,000ha, or 52%, of the land as a result of the process.