A MACHINE METHOD FOR MAPPING INSECT SURVEY RECORDS

1964 ◽  
Vol 40 (4) ◽  
pp. 445-449 ◽  
Author(s):  
C. E. Brown
Keyword(s):  
Large Volume ◽  
Forest Insect ◽  
Machine Method ◽  
Insect Distribution ◽  
Disease Survey ◽  
Recent Developments ◽  
Insect Survey

The Canadian Forest Insect and Disease Survey has accumulated a large volume of insect distribution records on punched cards. The time and labor needed to process this large volume of cards together with recent developments in the card processing and computer fields stimulated a search for new handling techniques. A program for the automatic plotting of insect distribution records from punched cards using a Univac computer and tabulator is described.

FORESTS, DISTURBANCES, AND INSECTS

1980 ◽  
Vol 112 (11) ◽  
pp. 1185-1192 ◽  
Author(s):  
J. M. McLeod
Keyword(s):  
Forest Disturbance ◽  
Theoretical Base ◽  
Collection System ◽  
Faunal Assemblage ◽  
Forest Insect ◽  
Faunal Assemblages ◽  
Biological Survey ◽  
Disease Survey ◽  
Recent Developments ◽  
Replacement Time

AbstractRecent developments in ecological theory pertaining to the coexistence of insect species in response to forest disturbance are reviewed, and the findings are applied to the requirements for the Biological Survey of the Insects of Canada. It is important that a data collection system have a sound theoretical base, otherwise it will probably be found inadequate for the purpose for which it was designed. Questions about changes in faunal assemblages should be related to the scale of disturbance relative to the replacement time of the forest. Recommendations for research on faunal assemblage disturbance relationships are made for the Forest Insect and Disease Survey of Canada, and for the northern boreal forest.

The Caragana Aphid, Acyrthosiphon caraganae (Cholod.) in Western Canada, and its Separation from the Pea Aphid

1962 ◽  
Vol 94 (10) ◽  
pp. 1075-1077 ◽  
Author(s):  
A. G. Robinson ◽  
G. A. Bradley
Keyword(s):  
British Columbia ◽  
North America ◽  
Chemical Control ◽  
Pea Aphid ◽  
Annual Reports ◽  
Western Canada ◽  
Forest Insect ◽  
Disease Survey ◽  
Caragana Arborescens

Except for occasional references in the Annual Reports of the Forest Insect and Disease Survey of infestations of an aphid on caragana (Caragana arborescens Lam.) in Western Canada and a note on chemical control (Bradley, 1952), there is no published record known to the authors of the occurrence of the caragana aphid, Acyrthosiphon caraganae (Cholod.), in North America. MacNay (1953) summarized reports that severe infesrations of aphids, “probably mainly the caragana aphid”, occurred on caragana in 1952 in the East Kootenays of British Columbia, and at several places in Alberta and Saskatchewan. At some localities 100 per cent defoliation was reported.

Estimation of Parasitism of Larch Sawfly Cocoons by Bessa harveyi Tnsd. in Survey Collections

1959 ◽  
Vol 91 (8) ◽  
pp. 496-500 ◽  
Author(s):  
W. G. H. Ives ◽  
R. M. Prentice
Keyword(s):  
Forest Insect ◽  
Small Areas ◽  
Pristiphora Erichsonii ◽  
Larch Sawfly ◽  
Insect Survey ◽  
Forest Biology ◽  
Biology Laboratory ◽  
Total Parasitism

The Forest Insect Survey at the Forest Biology Laboratory, Winnipeg, has been compiling records for a number of years on the percentage of cocoons of the larch sawfly, Pristiphora erichsonii (Htg.), parasitized by the tachinid Bessa harveyi Tnsd. Sawfly cocoons were collected each fall from the soil in infested stands, and those containing living larvae were dissected to determine the percentage of parasitism by B. harveyi. These estimates have been used to provide an index of parasitism (Lejeune and Hildahl, 1954), but are of limited value for a number of reasons: (1) estimates can be expressed only as percentage of sound cocoons parasitized; (2) total parasitism cannot be estimated because a portion of the parasites emerge from the cocoons before collection; and (3) estimates of parasitism may not be representative of the stand because there is a tendency to collect cocoons where they are easiest to find; hence all the cocoons in a collection may be from one or two small areas. If the proportion of cocoons containing B. harveyi varies within a stand such collections may give unreliable estimates of parasitism.

The Life History and Dispersal of the Bruce Spanworm, Operophtera bruceata (Hulst), (Lepidoptera: Geometridae)

1962 ◽  
Vol 94 (10) ◽  
pp. 1103-1107 ◽  
Author(s):  
C. E. Brown
Keyword(s):  
United States ◽  
Life History ◽  
The United States ◽  
American Continent ◽  
Forest Insect ◽  
North American Continent ◽  
The Third ◽  
The North ◽  
Insect Survey ◽  
Bruce Spanworm

The Bruce spanworrn, Operophtera bruceata (Hulst), is most common in the mid latitudes of the North American Continent; in Canada it occurs from Newfoundland to the interior of British Columbia (Prentice, In Press) and has been reported from Vermont and Wisconsin in the United States (Craighead, 1950.) Three outbreaks of this insect have been recorded in Alberta. The first occurred in 1903 (de Gryse, 1925) and was apparently of short duration. The second reported by Wolley Dod (1913) occurred in 1913 and denuded hundreds of acres of aspen poplar. Heavy defoliation in the third outbreak became evident in 1957 (Brown, 1957) but an examination of Forest Insect Survey records revealed that population buildup began about 1951. The outbreak continued to expand until 1958 and began to decline in 1959; by 1961 populations were again low except for one or two isolated areas where moderate to low populations persisted. At the peak of the outbreak in 1958 approximately 50,000 square miies were moderately or heavily infested and many more lightly infested.

BESSA SELECTA (MEIGEN) (DIPTERA: TACHINIDAE) AS A PARASITE OF GILPINIA HERCYNIAE (HARTIG) (HYMENOPTERA: DIPRIONIDAE)

1947 ◽  
Vol 79 (5) ◽  
pp. 84-104 ◽  
Author(s):  
L. S. Hawboldt
Keyword(s):  
High Mortality ◽  
Great Difficulty ◽  
Control Factor ◽  
Forest Insect ◽  
Larch Sawfly ◽  
Insect Survey

This project arose out of studies of the European spruce sawfly, Gilpinia hercyniae (Htg.), in connection with the Canadian Forest Insect Survey at the Dominion Entomological Laboratories, Fredericton, N.B. Bessa selecta (Mg.) had been observed as a parasite of the larch sawfly, Pristiphora erichsoni (Htg.), but particular interest was aroused in it as a parasite occurring on the European spruce sawfly. The latter host was frequently found to bear the eggs and integumental funnels of B. selecta. The object was to study its biology and effectivness as a possible control factor of the spruce sawfly. However, great difficulty was experienced in rearing the host due to high mortality caused by disease. Hence the original aims were not attained to the entire satisfaction of the author.

Artificially Disseminated Virus as a Factor Controlling the European Spruce Sawfly, Diprion hercyniae (Htg.) in the Absence of Introduced Parasites

1961 ◽  
Vol 93 (3) ◽  
pp. 228-238 ◽  
Author(s):  
F. T. Bird ◽  
J. M. Burk
Keyword(s):  
Virus Disease ◽  
Population Trends ◽  
Long Term Effects ◽  
Eastern Canada ◽  
Forest Insect ◽  
Insect Survey ◽  
Forest Biology ◽  
Biology Laboratory ◽  
Disease Free

An outbreak of the European spruce sawfly, Diprion hercyniae (Htg.), occurring in Eastern Canada between 1930 and 1942, was controlled by a virus disease (Balch and Bird, 1944). The sawfly has been kept at a low level by the disease and by parasitic insects introduced from Europe (Bird and Elgee, 1957).An infestation of the sawfly was discovered in 1947 near Sault Ste. Marie, Ontario, by the Forest Insect Survey Section of the Forest Biology Laboratory at Sault Ste. Marie. This infestation was about 100 miles beyond the previously known western distribution of the insect. Intensive larval sampling in 1949 showed that it was free from virus and practically free from introduced parasites. Thus, an excellent opportunity was provided to introduce the virus into a disease-free population, to study its establishment and spread, and to compare the long term effects of virus alone on population trends with the effects that virus plus introduced parasites were shown to have on population trends in New Brunswick (Bird and Elgee, 1957). The virus was introduced into the infestation in 1950 and studies were carried out each year from 1950 to 1959.

A NEW SPECIES OF BRACHYCYRTUS FROM BRITISH COLUMBIA (HYMEN.; ICHNEUMONIDAE)

1940 ◽  
Vol 72 (4) ◽  
pp. 85-86 ◽  
Author(s):  
G. Stuart Walley
Keyword(s):  
British Columbia ◽  
New Species ◽  
Forest Service ◽  
Adult Parasite ◽  
Forest Insect ◽  
South Eastern ◽  
Engelmann Spruce ◽  
Insect Survey ◽  
A New Species

It was with some surprise that the writer encountered a representative of this rare and, until recently, little known genus, from a locality in south-eastern British Columbia. The specimen in question is a female reared at Ottawa, by officers of the Forest Insect Survey of the Division of Entomology, Irom the cocoon of a Chrysopid beaten from Engelmann spruce, Aug. 26, 1938, by Mr. D. N. Ross of the British Columbia Forest Service, in the vicinity of Bayne's Lake, B. C. The adult parasite emerged in the laboratory, Feb. 20, 1939.

scholarly journals Conferința Internațională IUFRO ”Semnificația schimbărilor actuale de mediu asupra dăunătorilor și patogenilor din ecosistemele forestiere” Suceava, 16-20 septembrie 2019

2019 ◽  
Vol 19 (2) ◽  
pp. 209-218
Author(s):  
Mihai-Leonard Duduman ◽  
Daniela Lupaștean
Keyword(s):  
Central Europe ◽  
Forest Insect ◽  
Forest Insects ◽  
Disease Survey

În perioada 16 – 20 septembrie 2019, a avut loc la Suceava cea de-a 13-a conferință internațională a Grupului de lucru IUFRO* 7.03.10 „Methodology of forest insect and disease survey in Central Europe”, cu titlul „Recent Changes in Forest Insects and Pathogens Significance”. Conferința este organizată, la fiecare 2 ani, de către universități sau institute de cercetare din domeniul forestier din Europa iar, după 19 ani, conferința revine în România. Facultatea de Silvicultură din cadrul Universităţii ”Ștefan cel Mare” a avut onoarea de a fi organizatoarea acestei manifestări științifice importante, sub coordonarea comitetului grupului de lucru IUFRO 7.03.10. La buna desfășurare a conferinței au contribuit Asociația „Societatea pentru Silvicultură si Mediu Suceava”, precum și sponsorii Regia Națională a Pădurilor Romsilva și compania AlphaScent (USA). Temele abordate în cadrul conferinței se încadrează în sfera preocupărilor privind dăunătorii și bolile care afectează pădurile din Emisfera Nordică și identificarea de soluții tehnice pentru controlul bolilor și dăunătorilor, respectiv: actualizarea informațiilor privind distribuția bolilor si dăunătorilor forestieri; identificarea si monitorizarea speciilor invazive de boli și dăunători și identificarea de soluții pentru reducerea impactului bolilor și dăunătorilor forestieri. Conferința a reunit peste 80 de participanți și invitați, cercetători și practicieni din domeniul protecției pădurilor din 19 țări, care au împărtășit rezultatele activității lor în domeniul protecției pădurilor în cadrul celor 31 de prezentări orale și a celor 28 de postere afișate. Cu sprijinul colegilor de la Direcția Silvică Suceava, Ocolul Silvic Adâncata și Ocolul Silvic Pojorâta, programul conferinței a inclus o excursie in rezervațiile naturale Pădurea Zamostea Luncă și Codrul Secular Giumalău, o ocazie rară pentru participanți de a cunoaște și admira frumusețea naturii acestui colț de țară.

Small-Scale Imagery in Forest Pest Surveys in British Columbia

1974 ◽  
Vol 28 (2) ◽  
pp. 155-161 ◽  
Author(s):  
John W. E. Harris
Keyword(s):  
British Columbia ◽  
Aerial Photographs ◽  
Small Scale ◽  
Forest Pest ◽  
Forest Insect ◽  
Disease Survey ◽  
Forested Areas ◽  
Increasing Demand ◽  
Accurate Record ◽  
Improved Methods

Surveillance of the large forested areas of British Columbia by personnel of the Forest Insect and Disease Survey, Canadian Forestry Service, involves ground examinations, supplemented by limited observations from small aircraft. The increasing demand for better information, however, has resulted in a search for improved methods. One answer seems to be aerial photography, which offers a permanent accurate record. Conventional aerial photographs are useful but are expensive to obtain and interpret. This study has determined that the boundaries and intensity of a variety of forest pest infestations can also be delineated on color photographs at some of the smallest scales (about 1:137,000) available, and at least some infestations that contrast well with surrounding forests can also be seen on ERTS-1 imagery. The latter has the advantage of being routinely available and cost shared by various users, while normal photography requires a specific mission. Results with ERTS-1 are encouraging, and likely improvements in future resource satellites may be of increasing value in survey programs.

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