By Marion Gratwick M.Sc, D.I.C., C.Biol., M.I.Biol., F.R.E.S. (auth.), Marion Gratwick M.Sc, D.I.C., C.Biol., M.I.Biol., F.R.E.S. (eds.)
Following the dying of the MAFF's Perma a few leaflets to fill remarkable gaps. The nent Leaflet sequence in 1985, it was once advised content material of 3 leaflets has been altered extra that the ultimate variations of the crop pest advisory commonly. hence, Chafer grubs (Chapter 32) leaflets will be produced in a certain quantity now accommodates fabric from Leaflet 449, for the good thing about destiny agricultural entomolo jap beetle, which has been passed over from gists and others attracted to crop pests. This this assortment as this pest has now not develop into notion originated outdoor MAFF yet used to be enthusi confirmed in Europe. Nematodes on straw astically supported through entomologists in MAFF, berry (Chapter eighty one) has been enlarged by way of the the rural examine institutes and the uni addition of additional info on free-living versities. As editor of the leaflets from 1965 nematodes from the plant pathology leaflet on till 1985, I provided to adopt the duty of Soil-borne virus ailments of fruit crops. The compilation and modifying, and this supply was once joint plant pathology/entomology leaflet on authorised. Raspberry cane blight and midge blight has to avoid the publication from turning into fast been integrated, however the details has been outmoded, the sections on keep watch over measures in general limited to raspberry cane midge and feature been redrafted by means of the Advisory Entomol the identify replaced accordingly.
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Additional info for Crop Pests in the UK: Collected edition of MAFF leaflets
Ance, size and habit to the currant root aphid except that it attacks the roots of gooseberry and flowering currant (Ribes sanguineum) and is light reddish to yellowish-white. Other aphids In addition to the aphids already described, four other species are occasionally found on fruit bushes . The gooseberry-sowthistle aphid (Hyperomyzus pallidus Hille Ris Lambers) causes a characteristic yellow vein-banding on gooseberry leaves and migrates in summer to Sonchus arvensis (the field or perennial sowthistle) .
Brassica seedbeds These should be sited well away from seed crops to prevent them from becoming infested by aphids dispersing from the crops. Infested beds should be sprayed with an aphicide as necessary so that plants are clean when transferred to the field. Some insecticides applied for cabbage root fly control also give protection against early aphids. Turnip and swede Turnips are not attacked by cabbage aphid, but heavy infestations may build up on swedes. Infestations on swedes can cause considerable loss of yield and may be worth controlling, even on those grown for fodder.
The stems of Brussels sprouts etc. that have survived ploughing-in or heaping-up may also harbour the pest. From the end of May to July, the colonies on old Brussels sprouts, cabbage plants, oilseed rape, etc. produce winged aphids. These fly away and infest newly planted Brussels sprouts and other brassicas. They are at first inconspicuous on the new crop, but in favourable weather they multiply rapidly from August to October. Aphid numbers Aphid numbers vary widely from year to year. This variation may be partly due to attacks by various insect enemies, but the weather may have a greater influence: warm, dry weather in the second half of summer favours a rapid build-up, while cool, wet weather hinders it.
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