Development of a rapid biodiversity assessment methodology

Date Issued:2012-03-10

Abstract

Natural pest control is an important ecosystem service to the Australian cotton industry. The modern industry has reduced it's reliance on pesticide sprays using a combination of approaches and is much more environmentally aware than it is has been in the past. Techniques employed to reduce reliance on pesticides include the introduction of BT cotton, development of soft, pest-specific chemicals and encouraging or releasing beneficial (predatory) invertebrates into crops.To date, the focus of natural pest control in the Australian cotton industry has been on managing beneficial invertebrate numbers in crops. However, work by Nancy Schellhorn's group (CSIRO), Allan House's group (CSIRO) and Geoff Gurr's group (Charles Sturt University) is showing that the wider landscape can have an important influence on the abundance of pest and beneficial invertebrate species in crop. Some attention has been paid to the value of microbats in providing natural pest control services (i.e. Leah MacKinnon's Masters research and various projects by Martin Dillon et al.), but little attention has been payed to birds and the role they may play. In addition, there is little information on where in the cotton landscape birds and microbats reside, or the effect that the proportion of different land cover types at a landscape scale can have on populations of these natural pest controlling organisms. Momentum is now growing around on-farm biodiversity conservation as research continues to show the importance of biodiversity and ecosystem services to cotton growers. This new interest has been helped by pioneering growers such as Andrew Watson who have significantly decreased their use of pesticide sprays by managing their native vegetation, without a significant impact on their bottom line. However, many growers are currently unaware of the potential value of their on-farm native vegetation for natural pest control, and those that are aware, may lack the knowledge or skills to determine the condition of and manage it appropriately. Tools are required to allow growers to benchmark their current situation and inform management to maximise natural pest control services.

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