SELECTO 75 WSP cannot be applied:

SELECTO 75 WSP is a specialized pesticide formulation, and its application methods are crucial for ensuring both effectiveness and safety. The correct answer relates to the restriction on applying it through chemigation, which involves integrating the pesticide application into irrigation systems.

Chemigation can pose risks such as contamination of water supplies and inconsistent distribution of the chemical, especially in cases like SELECTO 75 WSP, which may have specific formulations designed for more controlled application methods. This restriction helps to mitigate potential environmental impacts and maximizes the effectiveness of the product by ensuring it is used in appropriate situations.

In contrast, applying SELECTO 75 WSP with a boom sprayer for broadcast, by soil injection, or by drenching involves methods that allow for targeted delivery to the intended sites. Each of these methods is suited to applying pesticides effectively while minimizing potential risks associated with misuse or over-application.