Pesquisa Agropecuária Brasileira (2000) 35, 879-886

A.L. Lourencao, J.C.V.N.A. Pereira, M.A.C. de Miranda and G.M.B. Ambrosano (2000)
Avaliação de danos causados por percevejos e por lagartas em genótipos de soja de ciclos precoce e semiprecoce
[Evaluation of damage to early maturity soybean cultivars and lines caused by stink bugs and caterpillars]
Pesquisa Agropecuária Brasileira 35 (5), 879-886
Abstract: The damage of stink bugs and caterpillars was evaluated in soybean cultivars and lines from two maturity groups, in experiments under field conditions, at the Instituto Agronômico, in the Experimental Station of Ribeirão Preto, SP, Brazil, in the 1995/96 and 1996/97 seasons. The stink bug infestation, predominantly Piezodorus guildinii (West.), was more intense in the first season. Anticarsia gemmatalis Hüb. infested the experiments only in the first year. Among the early maturing genotypes with approximately 110 days ('IAS 5', 'IAC 17', IAC 90-3395, IAC 93-345 and IAC 93-386), the cultivar IAC 17 showed the lowest defoliation (11.7%) caused by A. gemmatalis, while the line IAC 90-3395 presented the highest (28.3%). Regarding to the stink bug damage, as evaluated by three criteria (foliar retention, pod damage and yield), the lines IAC 93-345, IAC 93-386 and IAC 90-3395 and the cultivar IAC 17 presented the highest resistance levels, yielding more than cultivar IAS 5, in the first year. Among the genotypes of 120-days maturity group ('IAC 15', 'IAC 18', 'IAC 100', IAC 93-2277, IAC 93-2738, IAC 93-3335), the cultivar IAC 100 and the line IAC 93-3335 were the most resistant to A. gemmatalis. The cultivar IAC 15 was susceptible to that insect and to the stink bugs. The cultivar IAC 18 ranked as one of the highest yielding genotypes in spite of its high foliar retention, maintaining stable average yields over years. Among the lines, IAC 93-3335 showed the lowest defoliation by A. gemmatalis, and presented low pod damage and good yield, similar to cultivar IAC 18.
(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): André Luiz Lourencao

Research topic(s) for pests/diseases/weeds:
damage/losses/economics

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Anticarsia gemmatalis	Soybean (Glycine max)	Brazil (south)
	Piezodorus guildinii	Soybean (Glycine max)	Brazil (south)