A good resource for the pesticides that can be used on a crop is the Pacific Northwest Pest Management Handbooks (https://pnwhandbooks.org/). There are separate sections for insects, plant diseases and weeds. You can look for specific pests, or find chapters for various crops. Each chapter lists the pesticides that can be used on that crop.

Which products actually get used can vary widely, depending on the crop problems that occur in a particular field.

Here are the main chapters for wheat and clover:
Clover

• Weeds https://pnwhandbooks.org/weed/agronomic/forage-seed/clover-seed
• Insects https://pnwhandbooks.org/insect/legume-grass-field-seed/clover-grown-seed
• Diseases https://pnwhandbooks.org/plantdisease/host-and-disease-descriptions?title=clover

Wheat

• Weeds https://pnwhandbooks.org/weed/agronomic/cereal-grain/winter-wheat-west-cascades
• Insects https://pnwhandbooks.org/insect/agronomic/small-grain
• Diseases https://pnwhandbooks.org/plantdisease/host-and-disease-descriptions?title=wheat

Thank you!