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The pruinose scarab (Sericesthis pruinose Dalman) is native to the coastal districts of eastern Australia. It is found in pastures and turf generally, and is frequently the cause of severe damage to lawns and golf links. The biology and ecology of the species are discussed, and also the factors influencing the degree to which turf is damaged by the larvae. Field and insectary tests with DDT, BHC, aldrin, dieldrin, chlordane, and ethylene dibromide were carried out in 1955-1956. None of these insecticides effectively controlled infestations if applied during the winter months. Aldrin and dieldrin gave satisfactory results during warmer weather in autumn. Aldrin was particularly effective in controlling existing infestations. Dieldrin caused a less rapid kill, but owing to its superior persistence, it may serve to 'proof' turf against reinfestation for several seasons. |
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