| dc.rights.license | http://creativecommons.org/licenses/by-nc-sa/3.0/ve/ | |
| dc.contributor.author | Salinas, Pedro José | |
| dc.date.accessioned | 2011-05-24T19:15:40Z | |
| dc.date.available | 2011-05-24T19:15:40Z | |
| dc.date.issued | 2011-05-24T19:15:40Z | |
| dc.identifier.uri | http://www.saber.ula.ve/handle/123456789/33161 | |
| dc.description | Turrialba: Vol.36, Nº 1, Trimestre Enero-Marzo 1986 | es_VE |
| dc.description.abstract | El ciclo de vida de la polilla del repollo, Plutella
xylostella (L.) (Lepidoptera: Plutellidae), se estudió
bajo temperatura constante (20 +- 1º C) y con 16 ho-
ras de luz (08.00 a 2400) por día proveniente de seis
tubos fluorescentes de 125 vatios, de 2.40 m de longi-
tud. La humedad relativa no fue controlada, pero
permaneció entre 44 y 55% durante el día y hasta
14% más alto durante la nocha. A manera de compa-
ración se hizo observaciones en el laboratorio bajo
t5emperatura variable de la calefacción central domés-
tica (18 a 22º C, promedio 20ºC) y luz natural varia-
ble a través de ventanas de vidrio. Para reducir el efec-
to de luz lateral, las jaulas fueron rotadas 90º cada
día y la posición con respecto a la ventana se cambió.
No se controlo la humedad relativa. Se usó jaulas
plásticas circulares transparentes (aproximadamente
10 cm de diámetro y 4.5 cm de alto); las jaulas tenían
dentro una capa de cinco milímetros de arena hume-
decida. Se sacó discos de 2.5 cm de diámetro de hojas
tiernas de plantas jóvenes de repollo. Se permitió a
adultos de pLutella que ovipusieran por períodos de
.seis horas y los huevos recién puestos fueron coloca-
dos en los discos de hojas. | es_VE |
| dc.language.iso | es | es_VE |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.title | Ecología de la polilla del repollo, Plutella xylostella (L.) (Lepidoptera: Plutellidae). II. Ciclo de Vida. | es_VE |
| dc.type | info:eu-repo/semantics/article | |
| dc.description.abstract1 | The life history of the diamondback moth,
plutella xylostella (L.) (Lepidóptera:plutellidae), was studied
under constant temperature (20+- 1º C) and with 16 hours
light (08.00 to 2400) per day from six 125-watts fluorescent
tubes 2.40 m long. Relative humidity was not controlled but
remained between 44-52% during the day and up to
14% higher at night. As a means of comparison, observations
were made in the laboratory under variable temperature from
domestic-type central heating (average 20º C) and variable
daylight coming through a glass window; to reduce the side-
light effect, the cages were rotated 90º everyday, and posi-
tion with respect to the window was changed. Relative
humidity was not controlled. Circular transparent plastic
cages (aprox. 10cm diamater, and 4.5 cm height) were used;
inside the cages was a five mm layer of moistured sand. One
inch diameter leaf discs were taken from tender leaves of
young cabbage plants. The discs were placed in the same
position as they were in the leaf. Adult Plutella were allowed
to oviposit for short periods of about six hours. Recently
laid eggs were placed in the leaf disch. Observations were
made regularly. more than once in a day. At 20º C constant
temperature the total life duration was 41.3 days. First to
fourth instar: 12.7 days. pre-pupa: 1.3 days. Pupa: 712 days.
Mean development times were longer at constant temperature
except in fourth instar and pupa. | es_VE |
| dc.description.colacion | 130-134 | es_VE |
| dc.description.email | psalinas@ula.ve | es_VE |
| dc.publisher.pais | Venezuela | es_VE |
| dc.subject.thematiccategory | Medio Ambiente | es_VE |
| dc.subject.tipo | Artículos | es_VE |
| dc.type.media | Texto | es_VE |
