Resistência de soja a insetos: VI. Comportamento de genótipos em relação a percevejos

dc.contributor.authorRossetto, Carlos Jorge
dc.contributor.authorIgue, Toshio
dc.contributor.authorMiranda, Manoel Albino Coelho de
dc.contributor.authorLourenção, André Luiz
dc.date.accessioned2024-05-21T01:24:59Z
dc.date.available2024-05-21T01:24:59Z
dc.date.issued1986
dc.description.abstractThe performance of 35 soybean germplasms including 16 cultivars, 6 plant introductions and 13 lines derived from the soybean improvement program against stink bugs, was evaluated for two consecutive years, 1983/1984 and 1984/1985, in relation to the stink bugs (Hemiptera, Pentatomidae) species Piezodorus guildinii (Westwood), Euschistus heros (F.) and Nezara viridula (L.). The two experiments were conducted under field conditions at the Experimental Center of Instituto Agronômico located in Campinas, State of São Paulo, Brazil. A complete randomized block design with 35 treatments and 4 replications was used. The individual plot was a single row 2 meters long. Artificial infestations with adults were made to supplement the natural field infestation of stink bugs. The infestation level was moderate in the first year and severe in the second. Three criteria were used to judge the resistance to stink bugs: the percentual index of pod damage, the percentage of foliar retention after pod maturation and yield. The percentual index of pod damage is given by the formula 1/2 (% of pods with intermediate damage) + % of pods completely damaged. The percentage of foliar retention was visually estimated upon maturation of the pods. The cultivar Paraná was the most susceptible treatment being recommended for use as a susceptible check for stink bugs. The lines IAC80-4228 and IAC80-598-2-4, obtained through the soybean breeding program for resistance to stink bugs, had good performance. They still present however some undesirable agronomic features and cannot be recommended for distribution to the farmers. O comportamento de trinta e cinco genótipos de soja foi estudado em condições de campo, em Campinas, SP, em relação ao ataque dos percevejos pentatomídeos Euschistus heros (F.), Piezodorus guildinii (Westwood) e Nezara viridula (L.). A infestação natural do campo experimental foi suplementada com a liberação de percevejos adultos. Em 1983/1984, o dano médio sofrido pelos genótipos foi moderado e, em 1984/1985, severo. Três critérios foram utilizados para avaliar a resistência das variedades: a porcentagem de área foliar retida após a maturação das vagens, o índice porcentual de dano de vagem e a produção de grãos. A testemunha suscetível usada foi o cultivar Paraná, que produziu apenas 402kg/ha e 31kg/ha em 1983/ 1984 e 1984/ 1985 respectivamente. A linhagem IAC 80/4228 apresentou uma resistência estável, tendo produzido 1.675kg/ha e 1.639kg/ha em 1983/1984 e 1984/1985 respectivamente.
dc.identifier.issn0006-8705
dc.identifier.otherS0006-87051986000200011-scl
dc.identifier.urihttps://repositorio-aptaregional.agricultura.sp.gov.br/handle/123456789/2380
dc.relation.ispartofBragantia
dc.subjectsoja
dc.subjectGlycine max (L.) Merrill
dc.subjectpercevejos
dc.subjectPentatomidae
dc.subjectresistência de planta
dc.subjectPiezodorus guildinii (Westwood)
dc.subjectNezara viridula (L.)
dc.subjectEuschistus heros (F.)
dc.subjectsoybean
dc.subjectGlycine max (L.) Merrill
dc.subjectstink bugs
dc.subjectPentatomidae
dc.subjectplant resistance
dc.subjectPiezodorus guildinii. (Westwood)
dc.subjectNezara viridula (L.)
dc.subjectEuschistusheros (F.)
dc.titleResistência de soja a insetos: VI. Comportamento de genótipos em relação a percevejos
dc.typeArtigos
oaire.citation.endPage335
oaire.citation.issue2
oaire.citation.startPage323
oaire.citation.volume45

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