Pesquisa Agropecuária Brasileira (1999) 34, 1347-1351

Paulo Rogério Lustosa, José Cola Zanuncio, Germano Leão Demolin Leite and Marcelo Picanço (1999)
Qualidade da semente e senescência de genótipos de soja sob dois níveis de infestação de percevejos (Pentatomidae)
[Quality of seeds and senescence of soybean genotypes under two levels of bugs infestation (Pentatomidae)]
Pesquisa Agropecuária Brasileira 34 (8), 1347-1351
Abstract: The objective of this research was to evaluate the genotypes CR-1 and CR-3, from the genetic improvement program of soybean flavor of the Federal University of Viçosa, in Viçosa, MG, Brazil, under two levels of Heteroptera infestation. The genotypes tested were CR-1, CR-3, Cristalina, Davis (susceptible genotype) and IAC-100 (resistant genotype). The genotypes CR-1, CR-3, Davis and Cristalina under low level of infestation (2.8 Heteroptera/beating) produced similar percentage of normal seeds (57%) but inferior to the genotype IAC-100 (77%). Under high level of infestation (6.42 Heteroptera/beating), the genotypes CR-1, CR-3 and Cristalina produced similar percentage of normal seeds but inferior to the genotypes Davis (43%) and IAC-100 (59%). All genotypes showed low level of leaves retention (less than 6%) when cultivated under low level of infestation by Heteroptera but under high level of infestation of these bugs, the genotypes CR-1 and IAC-100 showed smallest level of leaf retention (less than 5%) followed by Davis and CR-3 (6-20%) and Cristalina (21-40%). The genotypes CR-1, IAC-100 and Davis showed no green stem under low infestation, contrary to what was registered for CR-3 (3.6% green stem) and Cristalina (11% green stem). IAC-100, CR-1, and Davis showed the smallest percentages of plants with green stem (6.4, 10.3 and 18.3%, respectively) compared to CR-3 (64.8%) and Cristalina (77.3%).
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
Full text of article
Database assignments for author(s): José Cola Zanuncio, Marcelo Coutinho Picanco

Research topic(s) for pests/diseases/weeds:
damage/losses/economics
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Nezara viridula	Soybean (Glycine max)	Brazil (south)
	Euschistus heros	Soybean (Glycine max)	Brazil (south)
	Piezodorus guildinii	Soybean (Glycine max)	Brazil (south)