Viewing post #1636604 by RoseBlush1

fwmosher said:RoseBluch1: You are quite correct to caution the use of soapy water combinations to kill aphids on hot days, and I have had problems in this regard unless I sprayed on knowingly, overcast days. Your point is well taken. But in my paranoid skitzy mind, I think the little bug--s are going to crawl back up my plants? LOL.

Frank, the rule of thumb is not to use any product that has fats or oils in it as part of your spray solution when temps are expected to reach 85F on the day you spray or within at least a week after spraying. Many rosarians say that temps should be below 85F for at least 10 days.