Of all the seeds out there, pulses can be the most challenging to treat for a variety of reasons. For example, chickpea can be hard to deal with, because it’s surface is very rough and has a lot of crevasses.
How does the nature of a seed impact seed treating?
You often need more seed treatment. In peas, I commonly see around 330ml to 500 ml of product per 100kg used. With chickpea, I’ve often seen up to 800ml used per 100kg of seed. You need more product for optimal coverage on a rough surface.
You may need to increase drying time. When you increase the amount of seed treatment required to get optimal coverage, it can mean that the seed is quite wet and requires a few hours, at least, to dry.
Mind your handling. A liquid seed treatment will get inside cracks on the seed surface, which can prevent seedling disease like rhizoctonia in peas. After a dry season, seed coats are more prone to breakage if not handled correctly. I’ve seen big issues in peas where seed coats are damaged, so handle your treated seed gently to prevent cracks and keeping a solid barrier between the disease and the seedling.
Mind the temperature. If seed temperature is cold, that can cause issues like flash freezing of the seed treatment. The seed treatment essentially freezes to the surface of the seed and cracks. In this situation, the best thing you can do is turn on the aeration fans to help warm up the seed before you treat.
Quality seed needs protection. The biggest thing to remember is even with high quality seed, which typically has very little seed-borne disease, there’s still a high level of soil disease pressure in a lot of fields. Especially with no-till systems, it’s crucial to be aware of disease in your soil. Seed treatments are great tools that help mitigate that risk and give your seed the best possible chance.