Efficacy of ultra-low volume aerial application of an azadirachtin-based insecticide for control of the pine false webworm,Acantholyda erythrocephala(L.) (Hymenoptera: Pamphiliidae), in Ontario, Canada

2003 ◽  
Vol 49 (1) ◽  
pp. 1-8 ◽  
Author(s):  
D. B. Lyons ◽  
B. V. Helson ◽  
D. G. Thompson ◽  
G. C. Jones ◽  
J. W. Mcfarlane ◽  
...  
Keyword(s):  
Aerial Application ◽  
Low Volume ◽  
Pine False Webworm ◽  
Acantholyda Erythrocephala

BIOLOGY OF PINE FALSE WEBWORM (HYMENOPTERA: PAMPHILIIDAE) DURING AN OUTBREAK

1999 ◽  
Vol 131 (6) ◽  
pp. 729-742 ◽  
Author(s):  
Christopher Asaro ◽  
Douglas C. Allen
Keyword(s):  
New York ◽  
Emerging Adults ◽  
Adult Emergence ◽  
Larval Feeding ◽  
Egg Survival ◽  
History Of ◽  
Egg Parasitism ◽  
Pine False Webworm ◽  
Acantholyda Erythrocephala ◽  
Two Populations

AbstractThe life history of pine false webworm, Acantholyda erythrocephala (L.), in three pine (Pinaceae) plantations in northern New York is similar to that reported for this species on red pine, Pinus resinosa Aiton, in Ontario. Adult emergence extended from early May to early June. The sex ratio of emerging adults favored males by as much as 2.7:1. Oviposition occurred from mid-May to early June. Significantly more eggs per fascicle were deposited on the distal third of branches and in the lower third of the crown. Larval feeding took place throughout June. The proportion of prepupae remaining in the soil for more than 1 year varied from 9% to 66% between two sites. There was no evidence of egg parasitism, and egg survival exceeded 95% in each of 2 years. A new species of nematode (Steinernema sp.) (Nematoda: Steinernematidae) was recovered from pronymphs. Homaspis interruptus (Provancher) (Hymenoptera: Ichneumonidae) parasitized larvae and emerged from 8.5% and 2.8% of the pronymphs in two populations.

scholarly journals Erratum to: Sex Pheromone of the Pine False Webworm Acantholyda erythrocephala

2010 ◽  
Vol 36 (2) ◽  
pp. 244-244
Author(s):  
Joseph K. Staples ◽  
Robert J. Bartelt ◽  
Allard A. Cossé ◽  
Douglas W. Whitman
Keyword(s):  
Sex Pheromone ◽  
Pine False Webworm ◽  
Acantholyda Erythrocephala

Control of grasshoppers (Phaulacridium vittatum) by ultra-low volume aerial application of technical maldison

1968 ◽  
Vol 8 (34) ◽  
pp. 631 ◽  
Author(s):  
M Casimir
Keyword(s):  
New South ◽  
New South Wales ◽  
Field Trials ◽  
Application Rate ◽  
Aerial Application ◽  
Normal Field ◽  
Treated Area ◽  
South Wales ◽  
Low Volume ◽  
Aerial Spraying

Field trials investigating ultra-low volume applications of undiluted technical maldison by aircraft against dense populations of Phaulacridium vittatum Sj�stedt (wingless grasshopper) are described. In February 1965 an application rate of 8.2 fl oz an acre gave 90-95 per cent reduction of grasshopper populations on a property on the northern tablelands of New South Wales. A further trial in November 1965, using rates of 4.6 and 5.6 fl oz per acre, gave similar results for each rate-70 per cent reduction of the population one day after spraying, rising to 80-85 per cent within eleven days. Some aspects of a large aerial spraying campaign conducted from October to December 1965 are also described. More than 150,000 acres were treated with maldison at the rate of 6.3 fl oz an acre. Detailed observations of the campaign spraying were made on a single property as well as general surveys of the whole treated area. A minimum application rate of 8.0 fl oz maldison an acre is suggested for normal field usage against P. vitiatum.

DEVELOPMENT OF A CHEMICAL CONTROL STRATEGY FOR THE PINE FALSE WEBWORM, ACANTHOLYDA ERYTHROCEPHALA (L.) (HYMENOPTERA: PAMPHILIIDAE)

1993 ◽  
Vol 125 (3) ◽  
pp. 499-511 ◽  
Author(s):  
D. Barry Lyons ◽  
Blair V. Helson ◽  
Geraldine C. Jones ◽  
John W. McFarlane
Keyword(s):  
Field Trials ◽  
Spray Drift ◽  
Egg Hatch ◽  
Management Objectives ◽  
Application Rates ◽  
Population Reduction ◽  
Late Application ◽  
Pine False Webworm ◽  
Acantholyda Erythrocephala ◽  
Laboratory Bioassays

AbstractThe pine false webworm, Acantholyda erythrocephala (L.) (Hymenoptera: Pamphiliidae), is an introduced sawfly that is becoming increasingly important as a pest of pine plantations in Ontario. Laboratory bioassays of 10 insecticides, applied to excised pine branches containing eggs immediately prior to hatching, indicated that carbaryl and permethrin at low dosages were efficacious in controlling larvae. Neither carbaryl nor permethrin affected egg hatch, and field trials at various dosages indicated that 500 g AI per ha of carbaryl significantly reduced larval numbers and mitigated defoliation of 1-year-old and current-year foliage. Comparisons of single early (during egg hatch), single late (mean instar about 3.8), and combinations of early and late applications of lower concentrations of both chemicals suggested that the late application better reduced webworm populations. All tested application rates of permethrin and carbaryl provided significant foliar protection, particularly to current-year foliage. Dosages as low as 35 g AI per ha of permethrin and 125 g AI per ha of carbaryl in mistblower applications of third- and fourth-instar larvae may provide suitable protection, depending on management objectives. Ground applications using a mistblower resulted in no differences in efficacy on branches from different vertical strata, but reduced efficacy was observed on branches on the sides of the trees opposite where sprays were applied. Spray drift tests with carbaryl at 500 g AI per ha indicated that some population reduction occurred in trees up to two 2.1-m-spaced rows downwind from treated trees. Thus, each row would not need to be sprayed in operational programs.

PHENOLOGY OF THE NATIVE PARASITOID SINOPHORUS MEGALODONTIS (HYMENOPTERA: ICHNEUMONIDAE) RELATIVE TO ITS INTRODUCED HOST, THE PINE FALSE WEBWORM (HYMENOPTERA: PAMPHILIIDAE)

1999 ◽  
Vol 131 (6) ◽  
pp. 787-800 ◽  
Author(s):  
D. Barry Lyons
Keyword(s):  
Emerging Adults ◽  
Adult Emergence ◽  
Classical Biological Control ◽  
Effective Rate ◽  
Flight Period ◽  
Limited Effectiveness ◽  
Emergence Traps ◽  
Pine False Webworm ◽  
Acantholyda Erythrocephala ◽  
Malaise Traps

AbstractThe parasitoid Sinophorus megalodontis Sanborne is a univoltine endoparasitoid that attacks larvae of the pine false webworm, Acantholyda erythrocephala (L.). The morphologies of the egg, instar 1, and cocoon are described. Adult-emergence and Malaise traps were used to examine the patterns of adult activity in Ontario. Adults emerged from the soil over 17 d, in late May and early June, and the median emergence of males preceded that of females by 3.5 d. The sex ratio of emerging adults was approximately 1:1. Malaise traps collected more adults than did emergence traps and also provided information on adult flight period, but collections were biased towards captures of males. Dissections indicated that S. megalodontis oviposited in all instars of the host and that temporal and spatial variations occurred in coincidence with host instars. Encapsulation and superparasitism limited effectiveness of the parasitoids in reducing host populations. At the end of the larval period, the parasitism rate was 17.1%, but encapsulation reduced the effective rate to 9.0%. Superparasitism was observed in 4.8% of the host larvae. There was some indication that parasitism resulted in retardation of host development. Later-dropping host larvae had a significantly greater incidence of parasitism. The host is an introduced insect from Europe, whereas the parasitoid is likely endemic to North America. Few North American parasitoids attack this introduced species, and S. megalodontis appears limited in its ability to reduce the size of pine false webworm populations. Consequently, pine false webworm is a suitable candidate for classical biological control attempts with introduced parasitoids from Europe.

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