How does grain protection happen if pyrethrum has no residue?
Pyrethrum is degraded by ultra violet light.
There’s precious little light deep inside a silo or a heap of grain, so pyrethrins breaks down slowly in the dark. Over months, not hours. The surface grains become vulnerable so it is advisable to cover the top with say black plastic sheeting or maybe sprinkle a permethrin dust over the surface.
The big bonus is that the repellency keeps the female insects away. They aren’t going to lay eggs anywhere near that pyrethrum stuff!
- 1 litre pack
- 5 litre pack
- Pyrethrins 100 g/L
- Piperonyl butoxide 600 g/L