There are also the possible adverse effects on predators, parasites and soil microorganisms which compete with, or feed on disease spores, insects, mites and nematodes. There is more and more evidence accumulating that it is the diversity of the soil from fauna and flora which suppress insect pests. These pests include white grubs and diseases like damping-off caused by Pythium and Rhizoctonia, and Phytophthora. In short, applying an unnecessary, preventive, soil insecticide does not eliminate risk and may not help your bottom line. A combination of bird-scare devices, each used for a short duration, will generally be more effective than relying on one technique.
Some growers think it works well.
If your seed companies do not use Thiram, you might request that it be used on all your corn and vine crop seeds or treat them yourself. Growers who have tried this product report inconsistent results. The author found that the latter two were much more effective than the chemical, and that the canon was the most cost effective and functioned almost as well as the kites. Another possible control device that may fit into some growers' management systems is an electronic bird-distress system called BirdGard. In Connecticut, you must obtain a permit from the Department of Agriculture to operate any noise-making device to control wildlife.