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Acacia nilotica is a spinescent woody legume that has become highly invasive in several parts of the world, including Australia where it has been decl...
Read moreCacao has been grown on a large scale round Popondetta in the Northern District of Papua New Guinea since 1958. Pest problems were present in the area...
Read moreThe following is virtually the author's summary. Studies were carried out in 1958-62 on some of the factors that affect the formation of bands of hopp...
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