PESTS OF INDIVIDUAL FLOWERS

Alyssum

FLEA BEETLES A tiny metallic-like beetle which attacks plants in their seedling stage. They also attack vegetables.

Control Dust regularly with derris dust – it is a good thing to begin doing this even before the plants come through.

Auricula

ROOT APHIS Foliage turns yellow and wilts right around the stems where they join the root.

Control Lift plants, wash roots in a nicotine wash (usual formula). Dip whole plant in this solution for two minutes.

Remove soil around plant and replace with sterilized soil.

Lupins

WEEVIL A grey insect that eats crescent-shaped pieces out of leaves.

Control Dust with derris at night time. Give young seedlings a feed of dried blood at 30 g/m3 (1 oz per sq yd).

Narcissus

NARCISSUS FLIES These lay their eggs on the neck of the bulbs in May. Maggots emerge and burrow down to the centre of the bulb. Leaves turn yellow at the tips. Control Sterilize bulbs in warm water.

Phlox

EELWORM

Control Take root cuttings from tap running washed roots only, as the eelworm lives in the stems and leaves.

Rose

RED BUD BORER Midge appears from mid July to mid August and lays eggs in wounds made during budding. Control Smear buds and raffia with Vaseline directly after budding.

CATERPILLARS AND MAGGOTS The larvae of many moths attacks the leaves and buds of roses. Control Spray with good liquid derris. SAWFLIES Various sawflies attack rose leaves, some boring into the stems, some skeletonizing the leaves and other rolling up the leaves.

Control Spray again with Pyrethrum such as Pysect. Hand-pick and burn all affected leaves and cut off branches tunnelled.

SCALE The stems of the bushes become covered with round, flat, whitish scales.

Control Spray well in September and again in February with a white oil emulsion to which a little nicotine has been added.

WEEVIL A clay-coloured insect particularly destructive to rambler roses.

Control Place a white cloth under the attacked bush after dark. Shake the bush and flash a bright light on to it. The weevils then fall off and may be collected and burnt.

Stocks

SAWFLY Little yellowish-green caterpillars collect on the undersides of the leaves and devour them.

Control Spray with liquid derris immediately the pest is seen.

Violets

RED SPIDER One of the worst diseases of violets. Control Keep soil in frames moist. Syringe the plants daily if enclosed. Dry conditions encourage red spiders. Spray with clean water using, if possible, a pressure of 70000 kg/m2 (100 lb per sq in). A derris spray has also proved effective, if a thorough soaking is given.

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