 If you want to try a two-shot approach to go for really high yields, spray pre-tassel and then again about three weeks later. In soybeans, the best timing for white mold starts at first flower, but for most other diseases, spray when you see the first pods. If you're going for high yields, spray again three weeks later. Diseases could be bad this year, but fungicides are effective when sprayed early. I'm Darren Hefty.