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Last year this little blighter decimated my pear crop, I subsequently learned that by the time you see the damage it's too late to do anything 
So this year I'm determined to get on top of it and one (of several) weapons I'm going to use is spraying, but which is the best one:-
a) Bayer 'Sprayday greenfly killer' with active ingredient Deltamethrin
b) Westland 'Resolva' with active ingredient Lambda-Cyhalothrin
Or do I use BOTH
So, if by any chance any of you have used both I would like to know which is your favorite, and should there be someone with technical knowledge please do post. What I know about chemicals can be written on the back of a postage stamp
So this year I'm determined to get on top of it and one (of several) weapons I'm going to use is spraying, but which is the best one:-
a) Bayer 'Sprayday greenfly killer' with active ingredient Deltamethrin
b) Westland 'Resolva' with active ingredient Lambda-Cyhalothrin
Or do I use BOTH
So, if by any chance any of you have used both I would like to know which is your favorite, and should there be someone with technical knowledge please do post. What I know about chemicals can be written on the back of a postage stamp
