The performance of the soybean line IAC 78-2318 in relation to oviposition and colonization by the whitefly Bemisia tabaci (Genn.) and to defoliation by caterpillars and chrysomelidae was studied in comparison to other varieties. At Campinas, State of São Paulo - Brazil, in greenhouse, the cultivars Santa Rosa, Paraná, BR-1, Bossier, IAC 8 and IAC 12, and the lines IAC 73-228, IAC 78-2318, D72-9601-1, PI 171451, PI 229358 e PI 274454 were submitted to artificial infestation of whitefly adults from tomato plants highly infested. Despite the high number of eggs in the IAC 78-2318 folioles, this line had a low colonization, comparable to the more resistants lines (PI 171451 and PI 229358). At Santo Antonio de Posse, SP - Brazil, in the field, when compared with 'IAC 11', 'IAC 8', 'Santa Rosa' and IAC 80-596-2, the IAC 78-2318 showed the lowest defoliation due to the attack of chrysomelidae, mainly Cerotoma arcuata (Oliv.) and Diphaulaca viridipennis Clark, and caterpillars, mainly Anticarsia gemmatalis (Hubn.). The IAC 78-2318 has been cited as a line with low damage by Epinotia aporema (Wals.) and by stink bugs; so, with the present results, it was characterized the presence of multiple insect resistance in this line.
soybean; Glycine max (L) Merrill; whitefly; Bemisia tabaci (Genn.); Chrysomelidae; defoliators; multiple insect resistance; plant resistance