scholarly journals Marking Adult Diamondback Moth, Plutella xylostella (L.), and Estimation of Adult Survival Rate and Population Density in a Cabbage Field

1988 ◽  
Vol 23 (3) ◽  
pp. 245-250 ◽  
Author(s):  
Annamalai SIVAPRAGASAM ◽  
Tetsuo SAITO ◽  
Yosiaki ITO
Keyword(s):  
Survival Rate ◽  
Population Density ◽  
Plutella Xylostella ◽  
Diamondback Moth ◽  
Adult Survival ◽  
Adult Survival Rate

Estimates of adult survival rate for three colonies of Sooty Shearwater (Puffinus griseus) in New Zealand

2008 ◽  
Vol 108 (3) ◽  
pp. 237-250 ◽  
Author(s):  
Rosemary J. Clucas ◽  
David J. Fletcher ◽  
Henrik Moller
Keyword(s):  
New Zealand ◽  
Survival Rate ◽  
Adult Survival ◽  
Adult Survival Rate

scholarly journals Food availability and larval density affect ovarian development in Plutella xylostella (L.) (Lepidoptera: Yponomeutidae)

1999 ◽  
Vol 28 (4) ◽  
pp. 611-616 ◽  
Author(s):  
Marina Castelo Branco ◽  
Alexander G. Gatehouse
Keyword(s):  
Population Density ◽  
Food Availability ◽  
Plutella Xylostella ◽  
Ovarian Development ◽  
Diamondback Moth ◽  
Larval Density ◽  
Leaf Disk ◽  
Plant Age ◽  
Insect Migration ◽  
Petri Dishes

The effect of Diamondback Moth (Plutella xylostella L.) population density and plant age on the rate of ovarian development was investigated. In tests carried out in Petri dishes, the density of larvae/leaf disk affected the rate of ovarian development. A high proportion of moths from larvae reared on leak disks from two or four-month-old spring cabbage at a density of seven or 14 larvae/leaf disk were mature at emergence. But moths reared at the same type of plant at a density of 28 larvae/leaf disk were largely immature at emergence. When the larvae were reared at a density of 30 larvae/plant on two or four-month-old spring cabbage plants, a high proportion of females were mature at emergence. Crowding has an important effect on the rate of ovarian development in Diamondback Moth with possible consequences for the migratory potential of moths, as insect migration generally occurs when the ovaries of the females are immature. The density of moths necessary to increase the proportion of immature females in the field is probably higher than 30 larvae/plant.

Adult Survival Rate of the Black-Throated Diver Gavia arctica

1977 ◽  
Vol 8 (2) ◽  
pp. 193 ◽  
Author(s):  
Sven G. Nilsson
Keyword(s):  
Survival Rate ◽  
Adult Survival ◽  
Adult Survival Rate
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