LIFE HISTORY AND HABITS OF THE WHITE PINE CONE BORER, EUCOSMA TOCULLIONANA (LEPIDOPTERA: TORTRICIDAE)

1998 ◽  
Vol 130 (1) ◽  
pp. 79-90 ◽  
Author(s):  
Peter de Groot
Keyword(s):  
Life History ◽  
Seed Orchard ◽  
Head Capsule ◽  
Egg Laying ◽  
Middle Level ◽  
White Pine ◽  
The North ◽  
Pine Cone ◽  
History Of ◽  
Pollen Release

AbstractThe life history of the white pine cone borer, Eucosma tocullionana Heinrich, was studied from 1992 to 1994 in an eastern white pine seed orchard in Ontario. Adults flew from late May to early July, and egg laying commenced in mid-June. Oviposition coincided with the onset of white pine pollen release. Eggs were laid singly or in clusters on cones, with most of the eggs laid on the basal third of the cone. Head capsule measurements indicated five instars. Larvae fed in cones from mid-June to the end of August. Mature larvae exited the cones and dropped to the ground to pupate. The insect is univoltine. Parasitism by the Hymenoptera, Trichogramma and Apanteles, accounted for 5% of the eggs and 1% of the larvae, respectively. About 40% of the larvae died from being entrapped in resin. There were no significant differences in attack rates by E. tocullionana within the tree except in the middle level, where the south quadrant had significantly higher rates than the north quadrant.

scholarly journals Life History of the Tamarind Weevil, Sitophilus linearis (Herbst) (Coleoptera: Curculionidae), on Tamarind Seed

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
James Adebayo Ojo ◽  
Adebayo Amos Omoloye
Keyword(s):  
Life History ◽  
Management Strategy ◽  
Head Capsule ◽  
Developmental Period ◽  
Growth Ratio ◽  
Egg Incubation ◽  
Tamarind Seed ◽  
Standard Procedures ◽  
Important Pest ◽  
History Of

The tamarind weevil, Sitophilus linearis Herbst (Coleoptera: Curculionidae), is an important pest of tamarind and other Caesalpinioideae. Investigating its life history is important in the implementation of management strategy. Its life history was monitored daily to understand its developmental biology on tamarind seed following standard procedures under laboratory conditions of 24–30°C temperature, 60–70% relative humidity, and 12L : 12D photoperiod. The egg incubation period lasted 3.17 ± 0.07 days. A mated female of S. linearis laid an average of 165 ± 5.78 eggs during an oviposition period of 86.8 ± 2.47 days. There were four larval instars, with a total larval developmental period of 16 days. The pupal period lasted 8 days, and adult lived 108.5 ± 3.61 days. The overall growth ratio for the four instars was 1.33. There was a regular relationship and significant correlation (r=0.94) between the stages of larval development and head capsule width.

The Life History of Babesia bigemina in the North American Fever Tick

Science ◽  
1931 ◽  
Vol 73 (1901) ◽  
pp. 620-621
Author(s):  
Emery Westervelt Dennis
Keyword(s):  
Life History ◽  
North American ◽  
Babesia Bigemina ◽  
The North ◽  
History Of

scholarly journals NOTES ON THE LIFE-HISTORY OF AGALLIA SANGUINOLENTA, Prov.

1892 ◽  
Vol 24 (2) ◽  
pp. 35-36
Author(s):  
Herbert Osborn ◽  
H. A. Gossard
Keyword(s):  
Life History ◽  
Egg Laying ◽  
Food Plant ◽  
Stages Of Growth ◽  
Leaf Hopper ◽  
History Of

This leaf-hopper is considered a clover pest, but is also known to feed on beets, rutabagas, cabbages and blue grass. It is active even in midwinter on sunshiny days. The eggs are thrust beneath the epidermis of the food-plant, and the first brood of larvæ appears from the middle of May until July 1st. The earliest individuals of the brood are nearly mature by the first of July and are supposed to begin egg-laying a little later. Larvæ can be found in all stages of growth from this time until the advent of winter, but most of the individuals are believed to be included in two broods.

BIOLOGY AND BEHAVIOR OF ZIMMERMAN PINE MOTH, DIORYCTRIA ZIMMERMANI, IN MICHIGAN

1967 ◽  
Vol 99 (5) ◽  
pp. 529-536 ◽  
Author(s):  
R. B. Carlson ◽  
J. W. Butcher
Keyword(s):  
Life History ◽  
Vertical Distribution ◽  
Uniform Distribution ◽  
Late Summer ◽  
Head Capsule ◽  
Early Summer ◽  
Main Stem ◽  
History Of ◽  
And Behavior ◽  
The Vertical Distribution

AbstractThis paper reports on studies of biology and life history of the Zimmerman pine moth, Dioryctria zimmermani (Grote), in southern Michigan.Adults emerged during the last 3 weeks of August and eggs hatched through mid-September. Eggs were laid almost entirely on the main stem and, upon hatching, the larvae entered recesses in the bark and spun hibernacula, ostensibly without feeding.Studies on the vertical distribution of larvae and pupae showed a fairly uniform distribution over the main stem in spring and early summer. In late summer, a larger percentage was found in middle whorls.Based on head capsule measurements, it is tentatively proposed that there are six larval stadia. Occurrence of parasitism in the last larval stadia is discussed, and a new egg parasite is reported.The presence of D. abietivorella Grote in the study areas is noted, and discussed briefly.

On the blood-sucking midge Culicoides vexans Stager, including the description of its eggs and the first-stage larva

Parasitology ◽  
1953 ◽  
Vol 43 (1-2) ◽  
pp. 148-159 ◽  
Author(s):  
B. Jobling
Keyword(s):  
Life History ◽  
Royal Society ◽  
Short Communication ◽  
Tropical Medicine ◽  
Stage Larva ◽  
The North ◽  
Blood Sucking ◽  
History Of ◽  
North Western

At one of the meetings of the Royal Society of Tropical Medicine and Hygiene, I made a very short communication on the three blood-sucking midges (Jobling, 1929). My particular reference was to Culicoides vexans, which is the most troublesome and commonestspecies in spring, in the northern and the north-western suburbs of London. At that time I had been studying the life history of this midge, including the morphology of its eggs, larvae and the pupa, but this work was not completed.

An Invasion of British Guiana by Locusts in 1917, with a complete Illustrated Account of the Life-history of the Species

1919 ◽  
Vol 9 (4) ◽  
pp. 341-357 ◽  
Author(s):  
G. E. Bodkin ◽  
L. D. Cleare
Keyword(s):  
Life History ◽  
British Guiana ◽  
North West ◽  
The North ◽  
History Of

British Guiana has not been invaded by migratory locusts since the year 1886, when, as far as it is possible to ascertain from the records of those bygone days, the same species of locust was implicated. Also, on the occasion of this previous attack, it seems very probable that a swarm first infested the North West and Pomeroon areas and, multiplying there, migrated further down the coast to Berbice.

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