AGRICOLA -- Guide to Subject Indexing

Do not use LIFTING for:• Back injury protection -- the inside story.• Non-loop method of lifting construction productsNo. 18, February 1989SUBJECT: Diuraphis noxia (Mordvilko), the Russian Wheat AphidDiuraphis noxia, the Russian wheat aphid (also known as Brachycolus noxius, theRussian grain aphid, or the barley aphid) is a newly introduced pest posing a seriousthreat to North American small grain crops. Since 1986, it has spread from Texas toSaskatchewan, and damage to wheat and barley has been extensive in some parts of theU.S. Crop losses have currently been estimated at $100 million dollars.DIURAPHIS NOXIA has been introduced as a descriptor in the second edition of theCAB Thesaurus, but it is not a descriptor in the first edition. Until the Indexing Branchbegins to index using the second edition, please add DIURAPHIS NOXIA to theidentifier field (653) and HEMIPTERA to the descriptor field (650) for all articlesdiscussing this pest.Annotate your copies of both editions of the Thesaurus so that they include crossreferences from other names for this pest to its scientific name, i.e.,• aphid, barley USE diuraphis noxia• aphid, russian grain USE diuraphis noxia• aphid, russian wheat USE diuraphis noxia• barley aphid USE diuraphis noxia• brachycolus noxius USE diuraphis noxia• grain aphid, russian USE diuraphis noxia• russian grain aphid USE diuraphis noxia• russian wheat aphid USE diuraphis noxia• wheat aphid, russian USE diuraphis noxiaNo. 19, April 1989SUBJECT: Use of Geographic Descriptors30