By David V. Alford
Oilseed rape, a massive crop in lots of elements of the area, is attacked by way of a variety of insect pests, lots of that are of substantial fiscal value. With the expanding call for to minimize agrochemical inputs on arable vegetation, the fee of the eu groups supported a three-year programme within which clinical members reviewed the average enemies of oilseed rape insect pests. a number of the outputs from this significant paintings shape the root of this complete new booklet. Biocontrol of Oilseed Rape Pests commences with a evaluate of the oilseed rape crop, by means of chapters on pests, pest administration techniques and parasitoids of particular pests or teams of pests. specific info can be incorporated on sampling, trapping and rearing pests, their parasitoids and predators; the identity of hymenopterous parasitoids; pathogens of oilseed rape pests, predators, predator taxonomy and identity, and the influence of on-farm panorama buildings and platforms on predators. This booklet is a necessary buy for all these concerned with oilseed rape and for an individual with an curiosity in agricultural biocontrol thoughts. it's also crucial interpreting and a useful resource of reference for agricultural scientists, entomologists, crop defense experts, advisers and specialists. All agrochemical businesses must have a number of copies of this ebook on their cabinets, as should still all libraries in universities and study institutions the place organic and agricultural sciences are studied and taught. Dr David V. Alford, established in Cambridge, united kingdom, has decades of expertise operating as a central authority entomologist.
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2 Fore wings membranous or modiﬁed as hardened covers (elytra); if fore wings membranous, then hind wings absent . . . . . . . . . . . . . . 4 Body delicate, less than 3 mm long; hind end of abdomen with a pair of siphunculi and with a distinct cauda; wingless or fully winged . . . . . . . . 3 Body robust, 6–8 mm long; mainly yellow to reddish-yellow; fore wings and hind wings fully developed; females with a saw-like ovipositor . . . . . . . .
2 – True legs absent . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. Eight pairs of abdominal prolegs (unlike those of lepidopterous larvae: without crochets); head distinct and orientated more-or-less vertically; body greenish-grey and later velvet-black, up to 18 mm long; feeding externally on foliage. . . . . . . . . . . . turnip sawﬂy (Athalia rosae) – Abdomen without prolegs; head orientated more-or-less horizontally and partly sunken into the prothorax; body whitish to creamish-white; head, thoracic legs, pinacula and prothoracic and anal plates black or brownish; not feeding externally on foliage.
Cabbage leaf miner (Phytomyza ruﬁpes) Forming large, whitish blotch mines in leaves; body up to 5 mm long, translucent, with white tracheae clearly visible, and with several broad, posterior tubercles; posterior spiracles located at the tips of a pair of close-set, pointed, cone-like processes . . . . . . . . . . Scaptomyza spp. Note 1. See Dosse (1952) for further details. Note 2. Pinkish or reddish midge larvae may also occur inside developing pods, but these are fungal feeders and of no economic importance.