CHEMICAL CONTROL OF THE RASPBERRY ROOT BORER, BEMBECIA MARGINATA (HARR.), ON LOGANBERRY IN BRITISH COLUMBIA

1960 ◽  
Vol 40 (1) ◽  
pp. 160-164
Author(s):  
J. Raine ◽  
H. Andison
Keyword(s):  
British Columbia ◽  
Chemical Control ◽  
Early Instar

A single spray of 25 per cent Diazinon emulsible concentrate applied as a drench to loganberry crowns in March, April or October against early instar larvae of the raspberry root borer, Bembecia marginata (Harr.) reduced a severe infestation (77 per cent or more) to 4 per cent or less of the crowns. This outstanding control was obtained at rates as low as 2 pints per 100 gallons and 1/2 pint of drench per plant (43 gallons per acre). Applications in May at 2 pints of drench per crown reduced the infestation to 10 per cent. The following emulsible concentrates reduced the infestation to between 0 and 10 per cent: at 1 pint of drench per crown applied in October, lindane at 5 pints, Thimet at 1 pint, or 12008 at 1 pint per 100 gallons; at 2 pints of drench per crown applied in April, Sevin at 8 pints, NC262 at 1/2 pint, or Phosdrin at 1 pint per 100 gallons. The drenches apparently killed the early instar larvae which overwinter in hibernacula at the base of the canes until early April, and feed just beneath the bark in May. Thus damage to canes that would bear fruit the following year was prevented.

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.

THE POPLAR-AND-WILLOW BORER, STERNOCHETUS (= CRYPTORHYNCHUS) LAPATHI (COLEOPTERA: CURCULIONIDAE), IN BRITISH COLUMBIA

1967 ◽  
Vol 99 (4) ◽  
pp. 411-418 ◽  
Author(s):  
John W. E. Harris ◽  
Harry C. Coppel
Keyword(s):  
British Columbia ◽  
Life Cycle ◽  
Larval Mortality ◽  
Vancouver Island ◽  
Water Emulsion ◽  
Early Instar ◽  
Preferred Hosts ◽  
North Latitude

AbstractA study was made of the poplar-and-willow borer, Sternochetus (= Cryptorhynchus) lapathi (L.) (Coleoptera: Curculionidae), in British Columbia between 1959 and 1964. The borer occurred principally south of 52 degrees north latitude. Willows were the preferred hosts. Ornamentals, hybrids in commercial plantings, and natural growing trees were attacked. The life cycle of the insect on southern Vancouver Island lasted up to 3 years; overwintering took place in early instar and adult stages. Eggs were laid in the bark; larvae mined first in the bark and then in the wood, where pupation took place. Few parasites and predators were found. DDT, dieldrin, and BHC killed adults; lindane (0.5% water emulsion), applied in the spring, caused larval mortality up to 96%.

Lophodermium oxycocci. [Descriptions of Fungi and Bacteria].

2005 ◽  
Author(s):  
D. W. Minter
Keyword(s):  
British Columbia ◽  
Czech Republic ◽  
New Jersey ◽  
Geographical Distribution ◽  
Chemical Control ◽  
Vaccinium Macrocarpon ◽  
Economic Damage ◽  
Twig Blight

Abstract A description is provided for Lophodermium oxycocci. Information is included on the disease, cranberry twig blight, caused by the organism, that can cause serious economic damage to commercial cranberry crops in Oregon and Washington. Some information on cultural and chemical control is given, along with details of its transmission, geographical distribution (Canada (British Columbia), USA (Alaska, Maine, Massachusetts, Michigan, New Jersey, Oregon and Washington), Russia, Czech Republic, Finland, France, Germany, UK, Poland, Sweden and Ukraine) and hosts (Vaccinium macrocarpon, Vaccinium sp. and V. oxycoccus).

scholarly journals Evaluation of Foliar Fungicide Sprays for the Control of Boxwood Blight, Caused by the Fungus Cylindrocladium buxicola

2013 ◽  
Vol 14 (1) ◽  
pp. 2 ◽  
Author(s):  
B. Henricot ◽  
E. Wedgwood
Keyword(s):  
British Columbia ◽  
Chemical Control ◽  
Laboratory Tests ◽  
Winter Season ◽  
Curative Treatment ◽  
Cultural Methods ◽  
The Usa ◽  
Blight Disease ◽  
The Uk ◽  
Foliar Fungicide

Cylindrocladium buxicola causes a damaging blight disease on boxwood which has spread rapidly throughout Europe since introduction of the pathogen in England in the mid 1990s. The pathogen has also been recently identified in the USA and British Columbia. The disease is difficult to control using cultural methods and information about chemical control is lacking. To address this, preventative and curative foliar fungicide sprays previously shown in laboratory tests to have efficacy were evaluated over two autumn/winter seasons in the UK. Results from the first autumn/winter season showed that the premix product Opponent (epoxiconazole + kresoxim-methyl + pyraclostrobin) was the best treatment when applied preventatively 3 days before inoculation. In the second autumn/winter season, curative treatment of diseased plants was best achieved with a weekly program of fungicides starting 3 days before inoculation and alternating with two or three products including Bravo (chlorothalonil), Signum (boscalid + pyraclostrobin), and Octave (prochloraz). The only fungicide tested and available to amateur growers in the UK, Fungus Clear (penconazole), was found to give moderate control of boxwood blight. Accepted for publication 7 August 2012. Published 24 October 2013.

Epidemiology, cultivar susceptibility, and chemical control ofGymnosporangium fuscumin British Columbia

1984 ◽  
Vol 6 (1) ◽  
pp. 63-70 ◽  
Author(s):  
D.J. Ormrod ◽  
H.J. O'Reilly ◽  
B.J. van der Kamp ◽  
C. Borno
Keyword(s):  
British Columbia ◽  
Chemical Control ◽  
Cultivar Susceptibility

Studies of the Lecanium Scale, Eulecanium coryli (L.), and its Parasite, Blastothrix sericea (Dalm.), in British Columbia

1953 ◽  
Vol 85 (5) ◽  
pp. 153-181 ◽  
Author(s):  
K. Graham ◽  
M. L. Prebble
Keyword(s):  
British Columbia ◽  
Population Density ◽  
Chemical Control ◽  
Host Population ◽  
Severe Injury ◽  
Horse Chestnut ◽  
Main Area ◽  
Nursery Stock ◽  
Low Levels

The lecanium scale was introduced into Vancouver with nursery stock from England in 1903, and by 1910 had become firmly established. Severe injury to broad-leaved maple, vine maple and horse chestnut was reported in 1923, and chemical control operations were undertaken from 1924 to 1930, but with very transitory effects (9, 10). The encyrtid wasp, Blastothrix sericea (Dalm.), imported from England in 1928 and 1929, quickly became established at the liberation points in Sorth Vancouver, and by June, 1930 had dispersed over an area of about 20 square miles. In April, 1931, twigs with parasitized scales from North Vancouver were distributed at intervals throughout the main area of lecanium infestation south and east of Vancouver, and by June of that year the parasite was known to be established over an area of about 100 square miles. By 1932, the percentage of parasitism in the mature lecanium females reached 90 to 100 per cent, and host population density was at very low levels (12, 13).

THE DAMAGE POTENTIAL OF SOME GRASSHOPPERS (ORTHOPTERA: ACRIDIDAE) OF THE NATIVE GRASSLANDS OF BRITISH COLUMBIA

1962 ◽  
Vol 42 (4) ◽  
pp. 596-601 ◽  
Author(s):  
L. G. Putnam
Keyword(s):  
British Columbia ◽  
Chemical Control ◽  
Poa Pratensis ◽  
Control Treatment ◽  
Damage Potential ◽  
The Third ◽  
First Instar ◽  
Native Grasslands ◽  
Single Chemical ◽  
Stipa Comata

In caged plot experiments in the native grasslands of the Interior of the province of British Columbia, feeding during the whole nymphal life of the grasshopper Camnula pellucida reduced the yield of Poa pratensis by 5.1 pounds per acre for each grasshopper per square yard. For each unit of infestation of 1 young adult grasshopper per square yard, 1.0 pound per acre per day was destroyed. The corresponding figures for Amphitornus coloradus on Stipa comata were 3.5 and 0.57 pounds per acre. First-instar nymphs of the migratory grasshopper Melanoplus bilituratus failed to survive when confined to S. comata; nymphs in subsequent stages, that had previously fed on other foods, did not thrive on S. comata, and each unit of infestation of 1 per square yard finally reduced yields not more than 2.6 pounds per acre. The results suggest that, where a single chemical control treatment is desired, it should not be delayed past the third instar as the modal developmental stage.

Co-ordinated Experiments on Chemical Control of Root Maggots in Rutabagas in British Columbia and Washington, 19531

1955 ◽  
Vol 48 (4) ◽  
pp. 470-473
Author(s):  
K. M. King ◽  
A. R. Forbes ◽  
D. G. Finalyson ◽  
H. G. Fulton ◽  
A. J. Howitt
Keyword(s):  
British Columbia ◽  
Chemical Control

BLACK-HEADED BUDWORM SPRAYING EXPERIMENTS ON VANCOUVER ISLAND, BRITISH COLUMBIA

1958 ◽  
Vol 34 (3) ◽  
pp. 299-306 ◽  
Author(s):  
G. S. Brown ◽  
A. P. Randall ◽  
R. R. Lejeune ◽  
G. T. Silver
Keyword(s):  
British Columbia ◽  
Vancouver Island ◽  
Time Of Application ◽  
Larval Stages ◽  
Late Instar ◽  
Early Instar ◽  
Degree Of Control ◽  
Aerial Spraying ◽  
Droplet Density

Aerial spraying experiments were carried out against the black-headed budworm, Acleris variana (Fern.), to determine the effectiveness of DDT sprays against the different larval stages, dosage requirements, and time of application. Two series of plots were sprayed, the first against the early-instar larvae and the second against late-instar larvae. Each series received dosages of 1 pound of DDT per Imperial gallon per acre and ½ pound DDT per ½ gallon per acre.Excellent control of larvae in all stages was obtained by the two dosage rates. The degree of control was more closely related to droplet density than to dosage. The best time to begin spraying for maximum foliage protection is when the majority of larvae are in the second instar.

CHEMICAL CONTROL OF THE EUROPEAN WIREWORM AGRIOTES OBSCURUS (L.) IN THE LOWER FRASER VALLEY OF BRITISH COLUMBIA

1957 ◽  
Vol 37 (4) ◽  
pp. 413-417 ◽  
Author(s):  
A. T. S. Wilkinson
Keyword(s):  
British Columbia ◽  
Chemical Control ◽  
Ethylene Dibromide ◽  
Agriotes Obscurus ◽  
The Third ◽  
Adequate Control ◽  
Good Protection ◽  
Cent Mortality ◽  
Silty Loam ◽  
Fraser Valley

The wireworm Agriotes obscurus (L.) was controlled in silty loam at Agassiz, British Columbia, from 1953 to 1956, by insecticides incorporated into the soil. Single applications of aldrin or heptachlor at 5 lb. of toxicant per acre gave good protection to potatoes planted a month after application, and gave 100 per cent mortality of wireworms by the second or third season. Aldrin at 2.5 lb., DDT at 15 lb., and granulated heptachlor at 3 lb. did not give adequate control in the year of application but gave appreciable control in the third and fourth seasons. Ethylene dibromide at 1.6 gal. per acre did not give control.

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