Problem with spraying anything while going for seed production is that depending on the chemical compounds, it could hinder seed production, even completely stop it while the rest of the plant burns and whithers. Stick with bio-controls or homemade horticultural soaps, also frequently foliar sprays of straight up water is a better IPM than most ppl might think, minor pressure wash if you must, the physical force of the water can kill a lot of soft bodied insects.