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on foliage.Yellow to white mottling of upper surface of leaves. Whole leaf may become puckered and turn brown at the edges.Cover a piece of stiff card with grease or contact adhesive and hold it above the infected plants while lightly brushing the foliage

. They then hide in the soil to pupate.Caterpillars eat holes in the leaves of verbascums, buddleia and figwort. In severe cases, the plant's leaves are completely decimated.The bright yellow and black caterpillars are easy to spot as they crawl across the leaves

, and is able to colonise new areas by producing seed.Spreading perennial plant that produces mats of foliage. Easily recognised by pretty, small, white-petalled flowers with a round yellow centre.Dig or grub out daisies from lawns using an old kitchen knife

surrounding gardens, fields and waste-ground.Clump of leaves growing from a single or multiple point. Leaves and flower stalks ooze a milky substance when snapped. Bright yellow-orange flowers are followed by a fluffy seedhead or dandelion 'clock

in from surrounding gardens, fields and waste ground.A bushy weed that bears small yellow flowers and fluffy seedheads. Its leaves often have orange-brown pustules of rust fungus in summer and autumn, which can spread to cultivated plants. Pull out young

on removing weedsSpeedwellSelf healHairy bitter cressYellow sorrel

-treat the plant using a total weedkiller such as glyphosate. Avoid spraying on a windy day and near other desirable plants. all over the gardenspring to autumnMore advice on removing weedsHairy bitter cressYellow sorrelChickweedGround elder

, removing any showing signs of deteriorationPick off yellowing leaves from the stems of Brussels sprouts and keep harvesting early varietiesCut down canes of autumn-fruiting raspberries to soil level

Hang up sticky yellow traps to catch whitefly and flying insectsPropagate houseplants, including monstera, dracaena and croton, by air layeringRepot any plants that are pot bound or getting top heavy. Tall plants are best placed in terracotta pots

I'm going to copy a lovely combination I saw at a friend's house, also grown at the allotment. My friend's vase contained yellow sunflowers and yellow dahlias (any yellow dahlia will do) and what looked like pale yellow daisies with a chocolate