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Titolo:
Predation of Amaranthus quitensis HBK seeds in soybean crops: Influence ofthe tillage system
Autore:
Nisensohn, L; Faccini, D; Montero, G; Lietti, M;
Indirizzi:
UnivaNacl Rosario, Fac Ciencias Agr, Catedra Malezas, RA-2123 Zavalla, Sant Univ Nacl Rosario Zavalla Santa Fe Argentina RA-2123 A-2123 Zavalla, Sant
Titolo Testata:
PESQUISA AGROPECUARIA BRASILEIRA
fascicolo: 3, volume: 34, anno: 1999,
pagine: 377 - 384
SICI:
0100-204X(199903)34:3<377:POAQHS>2.0.ZU;2-C
Fonte:
ISI
Lingua:
POR
Soggetto:
GROUND BEETLES; POPULATION-DYNAMICS; SORGHUM-HALEPENSE; CORN; COLEOPTERA; CARABIDAE; FIELDS; SOIL; AGROECOSYSTEMS; PREFERENCES;
Keywords:
Notiobia cupripennis; seed bank; tillage; weed;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: Nisensohn, L Univa,acl Rosario, Fac Ciencias Agr, Catedra Malezas, CC 14, RA-2123 Zavall Univ Nacl Rosario CC 14 Zavalla Santa Fe Argentina RA-2123 ll
Citazione:
L. Nisensohn et al., "Predation of Amaranthus quitensis HBK seeds in soybean crops: Influence ofthe tillage system", PESQ AGROP, 34(3), 1999, pp. 377-384

Abstract

The objective was to evaluate the losses of the superficial bank of Amaranthus quitensis seeds, due to insect predation, in a soybean crop and in thesubsequent fallow, in two tillage systems. Experiments were conducted during 1994/95 and 1995/96. To estimate predation rates, trays covered with wire meshes to prevent rodent predation, and with fine sheer net (tulle) in the control treatment were used; 100 weed seeds were sown in each tray, and the number of remaining seeds was registered every 15 days. Pitfall traps were used to identify insects species occurring in the field and to estimate their abundance. The carabid Notiobia cupripennis was captured in pitfall traps, the higher population found during March (4.5 and 5.8 insect/trap in conventional tillage and 2.7 and 3.3 insect/trap in no-tillage). The highest predation rates was also registered in March (5.6% and 8% in conventionaltillage and 2.7% and 3.8% in no-tillage) and both systems were significantly different as to abundance and predation. No significant differences werefound from April to June, and the number of insects and predation rates decreased. There was a positive correlation between the predation rates and the values of insect abundance in both years.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/09/20 alle ore 19:47:42