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Titolo:
Resistance of Africanized bees (Apis mellifera L.) as a cause of mortalityof the mite Varroa jacobsoni Oud. in Brazil
Autore:
Moretto, G; Mello, LJ;
Indirizzi:
Univ Reg Blumenau, Dept Ciencias Nat, BR-89010971 Blumenau, SC, Brazil Univ Reg Blumenau Blumenau SC Brazil BR-89010971 BC1 Blumenau, SC, Brazil
Titolo Testata:
AMERICAN BEE JOURNAL
fascicolo: 11, volume: 140, anno: 2000,
pagine: 895 - 897
SICI:
0002-7626(200011)140:11<895:ROAB(M>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
HONEY-BEES; BEHAVIOR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Moretto, G Univ Reg Blumenau, Dept Ciencias Nat, BR-89010971 Blumenau, SC,Brazil Univ Reg Blumenau Blumenau SC Brazil BR-89010971 BC SC, Brazil
Citazione:
G. Moretto e L.J. Mello, "Resistance of Africanized bees (Apis mellifera L.) as a cause of mortalityof the mite Varroa jacobsoni Oud. in Brazil", AM BEE J, 140(11), 2000, pp. 895-897

Abstract

Apis mellifera honey bees of African origin and their hybrids usually present greater tolerance of the parasite Varroa jacobsoni compared to honey bees of European races. Several mechanisms have been proposed to explain the low infestation of these bees by the Varroa pest. The objective of the present study was to determine the mortality rate of the varroa parasite and its relationship with proportion of mites versus adult bees. The study was conducted on ten colonies (nuclei) of Africanized bees under the climatic conditions of Blumenau, State of Santa Catarina, Brazil. The mortality rate ofVarroa jacobsoni was estimated from the daily number of dead mites found at the bottom of the hive and from an estimate of the total mite population of each hive. Mean daily mortality of the mites was 1.85%, i.e., almost 2% of the varroa population died daily. A high correlation was detected between mortality rate and the proportion of mites versus number of adult bees existing in each bee colony (r = -0.83; P<0.001).

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 06:27:53