What can misapplication of seed treatment cause?

• A. It has no impact on germination
• B. It always improves seed vigor
• C. Phytotoxicity or poor coverage can delay germination, reduce emergence, or lower vigor
• D. It guarantees pest resistance

Answer: (C)

Misapplication of a seed treatment can injure the seed or its developing seedling and leave protection uneven. If the chemical is used at too high a rate, is incompatible with the seed or with other products, or the coating process stresses the seed (for example by overheating), the seed can suffer phytotoxicity. This injury can delay germination, slow or reduce emergence, and lower seedling vigor. In addition, poor coverage means some seeds receive too little protection while others receive too much, leading to inconsistent establishment and the same outcomes. So the negative effects you’d expect from misapplication are delayed germination, reduced emergence, and lower vigor.