A mechanical killer, which gnats and shore flies have no resistance to. These pests transmit Pythium and other pathogens into hydroponics systems and populations can be hard to eliminate.
Diatomaceous Earth is a chalky white powder obtained from the natural fossilized remains of diatoms, a type of small hard-shelled ocean organism. These diatom particles are very small and sharp but are only harmful to the small exoskeletons of insects. Insects cannot become immune to its razor-sharp effects making it an effective mechanical killer. Because it is a light dust, it clings to the bodies of all stages of the insects. Maggots may also ingest the powder. The tiny diatom particles then cut through the waxy coating or lining of the insect’s gut and they eventually dry out and die.
Seed beds, especially those that use capillary matting, composted bark, rockwool or vermiculite, can be liberally dusted with diatomaceous earth. Use a “pepper pot” technique to liberally coat the media as seedlings are about to emerge. If washed into media during irrigation it will eliminate maggots as they hatch from eggs and will maintain its activity when plants are transferred into hydroponics systems. Also spread about any areas near the houses where gnat adults, larvae (maggots) or pupae may be present.
Some lines of diatomaceous earth, used for insulation in walls etc, have been heat treated to reduce abrasive properties. Do not use products that have been heat treated since they do not abrade the insect’s exoskeleton.
Diatomaceous earth contains a variety of nutritional elements and is rich in silica. Hydroponic crops that receive optimal levels of silica exhibit better health, have a more robust structure, increased yield and an enhanced ability to overcome environmental pressures.
Pricing:
1kg Bags for $20.00 + GST
