In the beginning of 2017, the demonstration project "Exclusion netting for managing Spotted Wing Drosophila in fruit crops", which is funded by BMEL, was launched under the leadership of JKI Dossenheim with participation of several federal states. The project includes main objectives of the National Action Plan on Sustainable Use of Plant Protection Products (NAP) which was decided on 10. April 2013 by federal goverment in accordance to § 4 of Plant Protection Act. National Action Plan on Sustainable Use of Plant Protection Products
The aim of demonstration project is to spread the netting of fruit cultures as a non chemical control measures in practice. Involved fruit growers gets assistance in the technical implementation of netting.
The process will be reviewed and evaluated by accompanying studies, also from the economic point of view. Within the project should be determined the optimal efficacy of netting in different cultures and under different given local conditions.
Until to the fifth project year, the demonstration project includes 22 fruit growers in Baden-Wuerttemberg, Lower Saxony and North Rhine-Westphalia, which cultivates the highly vulnerable cultures cherries, raspberries, blackberries and blueberries and which are representative for their region.
Over a period of minimum three growing seasons, data will be collected at fruit grower farms and optimisation work will be done. The demonstration fruit growers will be involved in the active mediation of lessons learnt.
As a pioneer and a direct contact, they play an important role within the dissemination of the procedure in their region. Other fruit growers, which works under the same conditions like the demonstration fruit grower (for example with regard to landscape structure, climate, infestation pressure), should be enabled to carry out netting against the Spotted Wing Drosophila independently and to weigh benefit and risk against each other.
Additionally, an economic valuation of the exclusion netting will be made within the subproject “Economics of exclusion netting for fruit crops to prevent infestation by the Spotted Wing Drosophila (Drosophila suzukii)”. The subproject analysis the economic feasibility of already installed nets against the Spotted Wing Drosophila, especially in cherry, raspberry, blackberry and blueberry. Therefore, parameters on investment and maintenance costs, labour input, crop yield and crop quality are to be assessed by interviews and investigations and then economically evaluated.
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