Resistência de soja a insetos: VI. Comportamento de genótipos em relação a percevejos
TLDR
The 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.Abstract:
The 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 Agronomico located in Campinas, State of Sao 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 Parana 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.read more
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Resistência de soja a insetos: VIII. IAC 78-2318, linhagem com resistência múltipla
TL;DR: The soybean line 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.
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Descrição, produtividade e estabilidade da cultivar de soja IAC-24, resistente a insetos
Manoel Albino Coelho de Miranda,Nelson Raimundo Braga,André Luiz Lourenção,Fernando Toledo Santos de Miranda,Sandra Helena Unêda,Margarida Fumiko Ito +5 more
TL;DR: The new cultivar IAC-24 soybean is resistant to insect damage, has good yield, and should be recommended for cultivation in State of Sao Paulo and similar environments.
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Avaliação de danos causados por percevejos e por lagartas em genótipos de soja de ciclos precoce e semiprecoce
André Luiz Lourenção,José Carlos Pereira,Manoel Albino Coelho de Miranda,Gláucia Maria Bovi Ambrosano +3 more
TL;DR: Avaliaram-se os danos causados por percevejos e lagartas em cultivares e linhagens de soja de ciclos precoce e semiprecoce em experimentos instalados em campo, na Estacao Experimental de Ribeirao Preto, nos anos agricolas 1995/96 e 1996/97.
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Genetic parameters and selection strategies for soybean genotypes resistant to the stink bug-complex
TL;DR: It is concluded that the best strategy for obtaining stink bug-resistant genotypes consists of selecting the PIPD trait in early generations (F 3 or F 4 ), followed by selection for the GFP, LR and PSS traits in generations with higher endogamy levels.
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Resistência de soja a insetos: X. Comportamento de cultivares e linhagens em relação a percevejos e desfolhadores
TL;DR: The performance of soybean cultivars and lines belonging to two maturity groups was evaluated in two experiments under field conditions in relation to the attack of stink bugs and defoliators; considering yield, most of the breeding lines showed good performance, yielding higher than the three cultivars.
References
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Journal ArticleDOI
Preferência de alimentação de adultos de Diabrotica speciosa (Germar) e Cerotoma arcuata (Oliv.) em variedades de soja
TL;DR: The preference for feeding in 5 soybean varieties of two species of leaf beetles, D. speciosa and C. arcuata (Oliv.) (Coleoptera, Chrysomelidae) was tested at Campinas, State of Sao Paulo, Brazil, under greenhouse conditions, in a free choice type of experiment.
Journal ArticleDOI
Resistência de soja a Nezara viridula e Piezodorus guildinii em condições de campo
M. A. C. de Miranda,Carlos Jorge Rossetto,D. Rossetto,Nelson Raimundo Braga,H. A. A. Mascarenhas,João Paulo Feijão Teixeira,E A. Massariol +6 more
TL;DR: There was a high positive correlation between percentage of seeds damaged and green stems at harvest and the seed size may be linked in some way to susceptibility to stink bugs.
Journal Article
Identificação de genótipos fontes de resistência a percevejos-pragas da soja
TL;DR: Os genotipos PI 227.687, PI 229.358, Chi-Kei no. 1 B e IAC 74-2832-77-10439 apresentaram as maiores percentagens de sementes sem danos de percevejos, y as testemunhas cultivares Davis, Santa Rosa e UFV-1 apresentam 28% de sementses sadias.
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Resistência de soja a insetos: III. Seleção de linhagens resistentes a percevejos
TL;DR: Through this breeding program it is possible to select against the principal undesirable characteristics of IAC 73/228 which are procumbent growth habit, low insertion of the first pods, low oil content and long cycle.
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Resistência de soja a insetos: II. Teste de livre escolha entre a linhagem IAC 73/228 e o cultivar Paraná, infestados por Nezara viridula (L.) em telado
TL;DR: Concluiu-se that os quatro criterios mais praticos para discriminar materiais resistentes de suscetiveis em condicoes de alto nivel de infestacao foram: producao em peso de graos, porcentagem de plantas com retencao foliar, indice of dano de vagens da regiao mediana da planta e por centagem oferec