DISTRIBUTION OF FIRST INSTAR NYMPHS OF ADELGES PICEAE (HOMOPTERA: PHYLLOXERIDAE) ON BRANCHES OF BALSAM FIR, ABIES BALSAMEA, AFTER COLONIZATION

1974 ◽  
Vol 106 (10) ◽  
pp. 1075-1080 ◽  
Author(s):  
D. G. Bryant
Keyword(s):  
Natural Population ◽  
Abies Balsamea ◽  
Balsam Fir ◽  
Population Unit ◽  
First Instar ◽  
Woolly Aphid ◽  
Adelges Piceae

AbstractBalsam woolly aphid nymphs, Adelges piceae (Ratz.), settle primarily in the apical 3-year growth of a branch. This portion of a branch is a natural population unit that can be designated a sample universe for detailed studies of aphid survival and mortality.

DISTRIBUTION, ABUNDANCE, AND SURVIVAL OF THE BALSAM WOOLLY APHID, ADELGES PICEAE (HOMOPTERA: PHYLLOXERIDAE), ON BRANCHES OF BALSAM FIR, ABIES BALSAMEA

1976 ◽  
Vol 108 (10) ◽  
pp. 1097-1111 ◽  
Author(s):  
D. G. Bryant
Keyword(s):  
Staminate Flower ◽  
Abies Balsamea ◽  
Balsam Fir ◽  
Ecological Studies ◽  
Mortality Factors ◽  
Flower Buds ◽  
Sample Unit ◽  
Woolly Aphid ◽  
Adelges Piceae

AbstractOver 95% of feeding balsam woolly aphids occur in crevices on balsam fir branches and the highest density occurs within the 3-year tip of branches. The crevices occur under the bud scales at nodes, the base of each season’s growth, and among staminate flower buds or among and within flower bracts. The abundance and survival of aphids as well as mortality factors vary with the location of the nodes in a branch, the type of branch, and aphid generation. The significant differences show that there are 9 to 13 strata within the 3-year tip of a branch. For ecological studies and measuring population levels, the cluster of aphids within a defined crevice, for example under the bud scale at the base of a cluster of shoots, can be selected as a sample unit.

SAMPLING POPULATIONS OF ADELGES PICEAE (HOMOPTERA: PHYLLOXERIDAE) ON BALSAM FIR, ABIES BALSAMEA

1976 ◽  
Vol 108 (10) ◽  
pp. 1113-1124 ◽  
Author(s):  
D. G. Bryant
Keyword(s):  
Abies Balsamea ◽  
Balsam Fir ◽  
Woolly Aphid ◽  
Adelges Piceae ◽  
Complex Distribution

AbstractThe balsam woolly aphid, Adelges piceae, has a complex distribution in the crown of trees; The sample universe and sample units are defined, and methods of detecting, monitoring, and measuring population levels at stated levels of confidence, accuracy, and assurance are described. Suggestions are given for sampling aphids on the stems of trees.

Releases in North America and Reviews of Bionomics in Europe of Insect Predators of the Balsam Woolly Aphid, Adelges piceae (Ratz.) (Homoptera: Adelgidae)

1957 ◽  
Vol 89 (9) ◽  
pp. 410-420 ◽  
Author(s):  
B. C. Smith ◽  
H. C. Coppel
Keyword(s):  
United States ◽  
North America ◽  
Abies Balsamea ◽  
Abies Alba ◽  
Balsam Fir ◽  
Northeastern United States ◽  
Eastern Canada ◽  
Woolly Aphid ◽  
Insect Predators ◽  
Adelges Piceae

The balsam woolly aphid, Adelges piceae (Ratz.), causes serious damage to balsam fir, Abies balsamea (L.) Mill., in Eastern Canada. It was introduced from Europe before 1900 (Balch, 1952) and has also become established in the northeastern United States. In continental Europe A. piceae is common on Abies alba Mill. but is not so serious a pest as in Canada. It has an extensive complex of insect predators in both Canada (Balch, 1934) and Europe (Delucchi, 1954). Balch (1934, 1952) found those in Canada inadequate as control agents. Some of the predators of Pineus pini Koch and Pineus strobi (Htg.) studied by Wilson (1938) in England, and recommended for introduction to new areas, were imported to Canada and released against A. piceae. Predators were first introdnced from Ensland in 1933 and later from continental Europe beginning in 1951.

scholarly journals Cone production of balsam fir damaged by balsam woolly aphid

1975 ◽  
Vol 51 (3) ◽  
pp. 105-107 ◽  
Author(s):  
Hugh O. Schooley
Keyword(s):  
Abies Balsamea ◽  
Moderate Level ◽  
Balsam Fir ◽  
Appreciable Effect ◽  
Cone Production ◽  
Woolly Aphid ◽  
Adelges Piceae

The effect of balsam woolly aphid, Adelges piceae (Ratz.), damage on cone production by balsam fir, Abies balsamea (L.) Mill., was studied on 49 trees classified into six aphid damage classes. Results showed that there was no appreciable effect until damage exceeded the moderate level. Cone production on trees damaged beyond this level was seriously reduced but, since advanced damage is not reached by all trees simultaneously, it was concluded that adequate seed should be available for stand replacement.

BALSAM WOOLLY APHID, ADELGES PICEAE (HOMOPTERA: PHYLLOXERIDAE), SEASONAL AND SPATIAL DEVELOPMENT IN CROWNS OF BALSAM FIR, ABIES BALSAMEA

1971 ◽  
Vol 103 (10) ◽  
pp. 1411-1420 ◽  
Author(s):  
D. G. Bryant
Keyword(s):  
North America ◽  
Abies Balsamea ◽  
Spatial Development ◽  
Shoot Tips ◽  
Balsam Fir ◽  
Tree Crown ◽  
Woolly Aphid ◽  
Two Generations ◽  
Adelges Piceae ◽  
Aphid Development

AbstractThe balsam woolly aphid, Adelges piceae (Ratz.), in Newfoundland is dimorphic and has three generations a year in the crowns of balsam fir trees. Two generations of the sistens, or diapausing form, predominate. Progredientes are more common than elsewhere in North America and occur on nearly all parts of a branch. They do not mature on current needles. The ratio of progredientes to sistentes is about 1:40 in balsam fir flowering years and 1:80 in non-flowering years. Aphid development in the spring is earliest at flowered internodes, 11 to 14 days later at 2-year-old nodes, a further 4 to 8 days later at older nodes, and latest at the shoot tips. Intra-crown and inter-tree differences in aphid development are small but measurable. Stratification of the tree crown is required for sampling during the first aphid generation.

Effect of Balsam Woolly Aphid on Cone and Seed Production by Balsam Fir

1976 ◽  
Vol 52 (5) ◽  
pp. 237-239 ◽  
Author(s):  
Hugh O. Schooley
Keyword(s):  
Seed Production ◽  
Abies Balsamea ◽  
Balsam Fir ◽  
Aphid Infestation ◽  
Woolly Aphid ◽  
Adelges Piceae

The size of cones and the quantity and quality of seed produced by balsam fir, Abies balsamea (L.) Mill, in five balsam woolly aphid Adelges piceae (Ratz.), damage classes were compared. No cone or seed abnormalities that could be attributed to aphid infestation or the amount of aphid damage to the trees were detected. Also, the severity of aphid damage had no influence on the incidence of damage to cones and seed caused by cone insects. No balsam woolly aphids were found on cones.

EFFICACY OF OIL-BASED FORMULATIONS OF BACILLUS THURINGIENSIS BERLINER VAR. KURSTAKI AGAINST THE HEMLOCK LOOPER, LAMBDINA FISCELLARIA FISCELLARIA (GUEN.) (LEPIDOPTERA: GEOMETRIDAE)

1989 ◽  
Vol 121 (1) ◽  
pp. 55-63 ◽  
Author(s):  
R.J. West ◽  
A.G. Raske ◽  
A. Sundaram
Keyword(s):  
Bacillus Thuringiensis ◽  
Abies Balsamea ◽  
Eastern Hemlock ◽  
Balsam Fir ◽  
Single Application ◽  
Early Application ◽  
Larval Population ◽  
First Instar ◽  
Hemlock Looper

AbstractOil-based formulations of Bacillus thuringiensis Berliner var. kurstaki, Dipel 132, Dipel 176, and Dipel 264, were aerially applied at rates of 1.18–2.36 L/ha over five 30-ha plots in a balsam fir, Abies balsamea (L.) Mill., forest in efficacy tests against the eastern hemlock looper, Lambdina fiscellaria fiscellaria (Guen.), in Newfoundland. Double applications of 30 Billion International Units (BIU) per hectare of each formulation and single applications of 40 BIU per hectare of Dipel 176 and Dipel 264 were tested. Larval population reductions of more than 95% and no defoliation of old or new foliage were observed in the plots receiving double applications and in the plot treated with a single application of Dipel 264. Larval numbers were reduced by 85% and defoliation was 4% in the plot treated once with Dipel 176.These treatments were applied against low to moderate larval populations, and their success was attributed to excellent spray coverage and early application when 50% or more of the larvae were still in their first instar.

scholarly journals A REVIEW OF THE BALSAM WOOLLY APHID IN NEWFOUNDLAND

1960 ◽  
Vol 36 (3) ◽  
pp. 278-290 ◽  
Author(s):  
W. J. Carroll ◽  
D. G. Bryant
Keyword(s):  
Biological Control ◽  
Insect Pest ◽  
Abies Balsamea ◽  
Control Program ◽  
Balsam Fir ◽  
Forest Insect ◽  
Control Factors ◽  
Climatic Control ◽  
Woolly Aphid ◽  
Two Generations

The balsam woolly aphid, Adelges piceae (Ratz.), first recorded in Newfoundland in 1949, is now the most serious forest insect pest in the Province, having spread over an area of more than 1,600 square miles. Its host is balsam fir, Abies balsamea (L.) Mill. There are three separate infestations, the largest and most important being in southwestern Newfoundland. The aphid has two generations a year. A biological control program was initiated in 1952 and seven species of predators have been released, three of which are established. Silvicultural and climatic control factors are discussed and the possibilities for the extension of outbreaks are considered.

SCANNING ELECTRON MICROSCOPIC STUDY OF WAX DISTRIBUTION ON THE BALSAM WOOLLY APHID, ADELGES PICEAE (HOMOPTERA: ADELGIDAE)

1979 ◽  
Vol 111 (1) ◽  
pp. 67-72 ◽  
Author(s):  
Arthur Retnakaran ◽  
Terry Ennis ◽  
Luc Jobin ◽  
Jeffrey Granett
Keyword(s):  
Related Species ◽  
Scanning Electron Micrographs ◽  
Electron Microscopic ◽  
First Instar ◽  
Scanning Electron Microscopic Study ◽  
Woolly Aphid ◽  
Scanning Electron Microscopic ◽  
Adelges Piceae ◽  
Hormone Analogs ◽  
Scanning Electron

AbstractScanning electron micrographs of balsam wooly aphid, Adelges piceae Ratz., show ribbon-like wax secretion in the dorso-median, marginal, and inter-tergal regions. Longitudinal grooves in the ribbons indicate that secretions from a row of cells fuse together to form bands of wax. Most of the ribbons appear as extensions of the tergal sclerites. Post-notal plates are conspicuous in the dormant first instar, and in the adults characteristic wax plates with crater-like pits are evident. The chemistry of wax in related species and a rationale for control using juvenile hormone analogs are discussed.

Morphometric variation between populations of the balsam woolly aphid, Adelges piceae (Ratzeburg) (Homoptera: Adelgidae), in North America

1980 ◽  
Vol 58 (8) ◽  
pp. 1494-1503 ◽  
Author(s):  
R. G. Foottit ◽  
M. Mackauer
Keyword(s):  
North America ◽  
Adult Stage ◽  
Morphological Characters ◽  
Multiple Discriminant Analysis ◽  
Morphometric Variation ◽  
Intermediate Group ◽  
First Instar ◽  
Woolly Aphid ◽  
Adelges Piceae ◽  
Reliable Classification

Morphological variation in characters of the first-instar and the adult stage of the balsam woolly aphid, Adelges piceae (Ratzeburg) (Homoptera: Adelgidae), were studied. Multiple discriminant analysis and UPGMA cluster analysis of the Mahalanobis generalized distances were used to classify 18 population samples collected on five Abies species throughout the known area of distribution. The populations were separated into three distinct groups: a "Maritime" group, a "British Columbia" group, and an "intermediate" group which consisted of samples from North Carolina, Oregon, and Washington. Variables taken from the adult morph gave a more consistent and, hence, a more reliable classification than the first-instar variables. Allocation of individual specimens into the three groups, as determined by identification functions, showed that the morphological characters measured in the adult stage correctly identified 85% of the specimens.It is suggested that the observed morphological divergence between eastern and western populations of A. piceae reflects the aphid's colonization history in North America. The importance of these findings for control is noted.

Sign in / Sign up

Export Citation Format

Share Document