RÉSUMÉ
Tests were carried out to evaluate resistance of common bean (Phaseolus vulgaris L.) to Diabrotica speciosa (Ger.) with the genotypes Goiano Precoce, Jalo Precoce, PR 95105146, PR 95105142 (Andean domestication center, AN), Emgopa 201 Ouro and IAPAR 57 (Middle American domestication center, MA). The experiments were conducted in 1998 and 1999, at the farm of UNESP-FCAV, Jaboticabal, SP, Brazil. The genotypes were planted in pots and 20 day-old leaflets were collected and foliar disks were cut of for the test. Two trials, a no-choice test and a free-choice test, were set up in BOD. In free-choice test, two disks of each genotype were kept in a 140-mm-diameter petri dish (total of 12 disks), where 12 adults were confined. In no-choice test, two disks of one genotype and two insects were placed in a 60-mm-diameter petri dish. A field experiment was conducted when 400 adults of D. speciosa were released. Fifteen leaflets per plot were collected 30 days after planting and the leaf area consumption was evaluated. A no-choice experiment was carried out with 20 day-old genotypes protected in individual cages and infested by 10 adults, for 72h. The MA genotypes were the most preferred on feeding tests conducted at BOD, field and individual cages, while the AN genotypes were less eaten.
Testes para avaliar a resistência de feijoeiro (Phaseolus vulgaris L.) a Diabrotica speciosa (Ger.) foram conduzidos com os genótipos Goiano Precoce, Jalo Precoce, PR 95105146, PR 95105142 (centro de domesticação Andino, AN), Emgopa 201 Ouro e IAPAR 57 (centro de domesticação Mesoamericano, MA), em 1998 e 1999, na Fazenda da UNESP-FCAV, Jaboticabal, SP, Brasil. Discos foliares obtidos de plantas com 20 dias de idade, mantidas em vasos, foram usados nos testes com e sem chance de escolha em BOD. No teste com chance de escolha 12 adultos foram confinados numa placa de Petri (140 mm de diâmetro), contendo dois discos de cada genótipo. No teste sem chance de escolha, foram confinados dois insetos numa placa de Petri (60 mm de diâmetro) com dois discos do genótipo a ser avaliado. No experimento de campo foram liberados 400 insetos e no 30° dia após o plantio, quinze folíolos por parcela foram coletados para avaliação do consumo foliar. Um experimento sem chance de escolha foi conduzido mantendo-se um vaso com um genótipo (com 20 dias de idade) em telados individuais cobertos com tecido voil onde liberaram-se 10 adultos por 72h. Os genótipos Emgopa 201 Ouro e IAPAR 57 (ambos MA) foram os mais preferidos nos testes conduzidos em BOD, campo e telados enquanto que os genótipos AN foram menos consumidos.