Bugs and other nasty stuff

I'm having a heck of a time this year with pests and the season has barely started. Last year I had that silvery veined stuff on my zucchini but didn't really take note of it until late in the season (although it was probably there early on). I have it again this year. What is it and what can I do about it? It didn't really seem to cause any harm but someone last year mentioned the leaves inability to do whatever it is they do with light (photosynthesis?). Also, I was just out in the garden and shook a zucchini leaf and much to my surprise there were all sorts of little white bugs that flew up from the plant. I've never had these before.
Then there's the tomato problem. Not the blossom drop business - yet. Just a couple of days after I'd planted them there were scads of little black bugs all over them. Sorta look like gnats. I sprayed them with BugBGone or somesuch. They are either dead or playing possum.
Then there's the bush beans. Sigh. There are light brown spots on the leaves and some chewed parts and holes. My gentleman friend suspects aphids. I've zapped them with the BugBGone, too.
My potatoes and peas don't seem to have any bugs or anything. They're about ready for harvest so have probably dodged the bug bullet. Sue
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Slight amendment. I just moved some of the potato leaves and found myself in a cloud of those little white bugs. The potatoes are in a different section of the yard than the zucchini. Sue

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If you asked about this last year then it's likely that I replied to it last year, too. The silver pattern splashed across young leaves is normal coloration. IT IS NOT A DISEASE!!! Only when the leaves start to show a white mildew do you have problems, but the silver pattern on leaves when the plant is young is quite normal and it is not a mildew.
Zucchini leaves and carrot leaves are magnets for white fly, as also are tomatoes and potatoes. There are chemical-free methods to reduce their numbers, such as a bright yellow sheet of cardboard smeared all over with Vaseline: held in sunshine near the plants while the leaves are shaken the yellow attracts the flies and they get stuck in the sticky grease. Or if you have only a few plants you could try waving a vacuum cleaner around and sucking them up. Cover the end of the hose with a ball of chicken wire or something to prevent sucking in the leaves. But you'll probably end up deciding to spray the white fly, but I don't know what pesticide to suggest. -- John Savage (my news address is not valid for email)
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