James:

I do not use streptomyocin nor do I use dial N spray Ortho sprayers. I do have numerous apple and pear trees that I spray with a 16 gallon sprayer (22 trees total). I use Captan, Acetamiprid, myclobutanil (Rally) and one other insecticide on my trees.

I have sprayed Captan in the spring mixed with myclobutanil and had excellent results when sprayed in May before petal fall for apple scab prevention. Both are good products for apple scab prevention and when used together are exceptional. I only use them together in the tank mix during May if the weather is very prone to numerous rains as myclobutanil is much more lasting after a heavy rain than Captan. After May I will use either one of these fungicides when spraying but not both together although one could still use both in the tank mix anytime you are spraying during the season. Captan also does not work well to prevent cedar/apple rust but myclobutanil does. Another good reason to use at least 1-2 sprays containing myclobutanil sometime from leafing out to just after petal fall to prevent cedar/apple rust.

After petal fall I have sprayed with Captan+ Acetamiprid for insect/disease prevention as these two products are tank compatible. Using Myclobutanil + Acetamiprid should be tank compatible too.

Not sure about streptomyocin on tank compatability but I see no need why you would want to have 4 different sprayers. One sprayer should be sufficient. Even if strep is not tank compatible, the season for spraying with strep is so short one could apply it separately as long as you clean out your spray tank well afterwards.

This is perfect. Thanks!