By David V. Alford
A whole figuring out of the biology and lifestyles histories of pest species is essential for all these excited about crop construction and crop safeguard. this significant new identify presents complete insurance of significant insect and mite pest species, essentially in Northern Europe. Textbook of Agricultural Entomology is widely divided into elements. the 1st half covers the exterior and inner positive factors of the most important insect and mite pest households, whereas the second one half presents distinctive descriptions of significant pest species together with info on existence historical past levels (vital details whilst contemplating regulate tools) and the vegetation which those species assault.
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Additional resources for A Textbook of Agricultural Entomology
123) A small group of insects, structurally similar to adelgids but alates with just three antennal segments and wings held flat when in repose; wax (if present) never flocculent. EXAMPLES: Viteus vitifoliae (grape phylloxera), Phylloxera glabra (oak leaf phylloxera). Superfamily COCCOIDEA (scale insects) Fig. 42 Venation of an alate adelgid - family Adelgidae. Cu1 and Cu2 veins on forewings and hindwings close-set and noticeably divergent: subfamily Pemphiginae - venation of forewing reduced (Fig.
1A and 2A of forewings Y-shaped, being united distally (Fig. 30b). EXAMPLE: Javesella pellucida (cereal leafhopper). 24 The Main Groups of Insects and Mites Fig. 34 Nymph of a psyllid, Psylla sp. - family Psyllidae (x25). Fig. 33 Outline and venation of forewing of a psyllid: (a) family Psyllidae; (b) family Triozidae. EXAMPLES: Psylla mail (apple sucker), Psyllopsis fraxini (ash leaf gall sucker). 14. Family TRIOZIDAE (p. 103) Series STERNORRHYNCHA (= PHYTOPHTHIRES) Antennae long and thread-like, without a distinct arista (but apical segment often with a narrow terminal process); rostrum appearing to arise from between the forelegs; tarsi 1- or 2segmented.
Often predatory but some species associated with stored farm products. EXAMPLE: Cryptolestes spp. (grain beetles). 14. Family SILVANIDAE (flat grain beetles) Essentially similar to members of the family Cucujidae but antennae clubbed and the third tarsal segment lobed beneath. EXAMPLES: Ahasverus advena (foreign grain beetle); Oryzaephilus surinamensis (sawtoothed grain beetle). 12. Family NITIDULIDAE (p. ) A large and varied family of mainly small beetles; elytra typically shorter than abdomen, with 5 The number of tarsal segments on the foreleg, midleg and hindleg, respectively.
A Textbook of Agricultural Entomology by David V. Alford