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Adam Pasco and I are talking about pests and diseases, using some seriously grim plant samples - some came from my own garden and travelled up here with me in the car. Adam claims the rest came from "a friend's garden", although I think they must come

If I had to describe myself, I'd say I was a nature lover. I'm forever taking the side of birds, insects, amphibians and mammals, and can argue the case for just about any creature, even pests. But at this time of year there is one exception

by leek moth. More and more gardeners have been asking about this small but potentially devastating pest at recordings of Gardeners’ Question Time, and at talks I have given.The caterpillars of the moth cause horrible, discoloured patches on the leek

I had hoped that the ultra-harsh winter weather would decimate overwintering populations of pests. This would go at least some way towards making up for all the bay trees and mimosas that gardeners lost during the cold spell.The outcome

In early spring, there were a lot of discussions in the garden media over whether the harsh winter would have reduced numbers of garden pests.The slugs and snails were slow to appear after the cold, dry April. But most other critters, good and bad

pots and flower beds, keep an eye out for slug and snail eggs, plus leatherjackets (the larvae of crane flies, pictured, left), chafer grubs and vine weevil larvae. Removing these pests now will save you time (and your crops) later, and the birds

), the compost, the feed, the potting-on compost, the containers, in some cases the pest-sprays, the lighting and heating sometimes too. And that is not including the man-hours - probably the most unreliable, stressful and costly element in the equation!The other

the dreaded pests and diseases can look good. Cuckoo spit usually appears from about June onwards and inside the fascinating glob of 'spit' are immature (or nymph) frog hoppers, most commonly Philaenus spumarius. They sit in the wonderfully protected frothy

, but the larvae, with their larger than expected size and strange almost caterpillar-like scuttling habit, are more likely to be incorrectly identified. All too often people tell me they have squashed them, believing them to be garden pests, when in fact