Garden Bird: Products to Attract Wild Birds to Your Garden.
Bird Box Dusting Powder
Developed specifically for use on nest boxes, this dusting powder works by first killing off pests and parasites, then protecting against re-infestation. It is completely pesticide-free, fully biodegradable and suitable for use in organic environments. Full instructions included. 150g in 'puffer' container
Price GBP3.95
Always check at the store... Occasionally prices change slightly. You will also see the P&P charges if any for your purchase.
Delivery by 1st class post