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Macadamia Nuts
I grow Macadamia Nuts in Bay of Plenty area. Can you tell me if Neem Oil is successful in dealing with green shield bugs? Is there a remedy that will kill them. Not sure if we can go organic because of this problem. How do others deal with it? They are our only real problem and do not want to use chemicals anymore.
Debbie Howell

Neem oil can be effective on green shield bugs. However, apparently efficacy depends considerably on the formulation. There are various products on the market. Some of them are not BIOGRO/DEMETER approved or only allowed for restricted use.

Pyrethrum should be affective against green shield bug, but again, if going for certification watch which product is being used, some are prohibited others are restricted.

The overall environment should be fostering natural enemies of the pests, e.g. diverse shelter, abundance of flowering plants throughout the seasons especially Apiaceae [Parsley/Carrot family] and Phacelia/Buckwheat strips. Contact the BIOGRO office at Wellington, info@bio-gro.co.nz or 04 801 9741, for contacts of other organic Macadamia growers and ask for advice.





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