Notes on Insect Parasites and Predators of the Swaine Jack-Pine Sawfly in Wisconsin

1964 ◽  
Vol 57 (3) ◽  
pp. 355-357
Author(s):  
George C. Becker ◽  
D. M. Benjamin
Keyword(s):  
Jack Pine ◽  
Pine Sawfly ◽  
Insect Parasites

STUDIES OF THE FEEDING ORIENTATION OF THE JACK PINE SAWFLY, NEODIPRION PRATTI BANKSIANAE ROH.

1958 ◽  
Vol 36 (2) ◽  
pp. 175-183 ◽  
Author(s):  
A. W. Ghent
Keyword(s):  
Jack Pine ◽  
Pine Sawfly ◽  
Underlying Mechanisms

The heads of feeding larvae of the jack pine sawfly are consistently oriented towards the needle tips. This orientation is not obtained from the apically-directed needle teeth, and is found to be independent of gravity and of the flexibility of the foliage. Though light can act to disrupt the orientation, larvae adopt the orientation in darkness so that light cannot be postulated as an essential directive stimulus. The behavior is identified as a "free-end" response, and possible underlying mechanisms are discussed.

Swaine Jack-Pine Sawfly in Wisconsin

1953 ◽  
Vol 46 (4) ◽  
pp. 703-703 ◽  
Author(s):  
Daniel M. Benjamin ◽  
Norbert B. Underwood
Keyword(s):  
Jack Pine ◽  
Pine Sawfly

THE SUPPRESSION OF GROWTH RINGS IN JACK PINE IN RELATION TO DEFOLIATION BY THE SWAINE JACK-PINE SAWFLY

1963 ◽  
Vol 41 (2) ◽  
pp. 227-235 ◽  
Author(s):  
L. C. O'Neil
Keyword(s):  
Pinus Banksiana ◽  
Radial Growth ◽  
Jack Pine ◽  
Growth Rings ◽  
Cross Sectional ◽  
Pine Sawfly ◽  
Young Stand ◽  
The Dead ◽  
Dense Stand

An investigation of the radial growth of jack pine (Pinus banksiana Lamb.) defoliated by the Swaine jack-pine sawfly (Neodiprion swainei Midd.) disclosed that growth rings were discontinuous and missing in cross-sectional disks from severely damaged trees. In young and open-grown trees with dead tops, the incidence of such deficiencies in radial growth was especially high in disks from upper regions of the stems, in the vicinity of the dead tops; radial growth was suspended for 1 year and subsequently resumed in disks from the lower regions of some stems. Cambial inactivity was more generalized in trees from an old and dense stand and it was detected in disks representing major portions of some of the stems sampled; the death of some trees followed 2 to 6 years of cambial inactivity in disks cut at various heights along their entire stems. Growth deficiencies in the young stand were clearly effects of severe sawfly defoliation. Data from the old, dense stand indicated that sawfly defoliation had perhaps merely hastened the gradual deterioration of the stand in which intertree competition was intense.

The Epidemiology of the Swaine Jack-pine Sawfly, Neodiprion Swainei Midd.

1970 ◽  
Vol 46 (2) ◽  
pp. 126-133 ◽  
Author(s):  
J. M. McLeod
Keyword(s):  
Tree Mortality ◽  
Jack Pine ◽  
Pine Forests ◽  
Population Increase ◽  
First Year ◽  
Pine Sawfly ◽  
Jack Pine Forests ◽  
Commercially Important

Neodiprion swainei, a defoliating sawfly specific to jack pine, has destroyed thousands of acres of commercially important jack-pine forests in recent years. This sawfly can kill trees within 4 years of the start of a population increase. Outbreaks are usually found in foci in poorer jack-pine sites on outwash plains. Tree mortality occurs after complete defoliation of the previous years' foliage, combined with severe defoliation of the current year's foliage. Tree mortality starts in the first year after particularly severe defoliation and may be cumulative to 5 years; thus, detection of the insect in a stand should warrant increased watchfulness.Outbreaks may follow at intervals of about 8 years. Hazard areas for Quebec and Ontario are defined.

scholarly journals Results of an Aerial Spraying Operation Against the Swaine Jack Pine Sawfly, Neodiprion swainei Middleton, in Quebec utilizing the Insecticide Phosphamidon

1968 ◽  
Vol 44 (5) ◽  
pp. 14-20 ◽  
Author(s):  
J. M. McLeod
Keyword(s):  
Jack Pine ◽  
Pine Forest ◽  
Pine Sawfly ◽  
Aerial Spraying ◽  
One Year

In August 1965, 135,000 acres of jack pine forest in the St. Maurice Valley, Quebec, were sprayed with Phosphamidon for control of an outbreak of the Swaine jack pine sawfly, Neodiprion swainei Middleton. Applied by spray planes at a rate of 0.2 gallon per acre containing ¼ pounds of active insecticide material, it resulted in 99% mortality of the sawfly, and the threat of defoliation subsided. Phosphamidon applied at [Formula: see text] lb. per acre in a subsidiary test was almost as effective. One year after treatment, the sawfly population remained suppressed in the spray area, with no immediate prospect of resurgence. The treatment did not adversely affect the balance between the sawfly and its parasites, nor cause long-term instability in populations of other insects, birds and mammals living in the forest.

The Relationship of Spathimeigenia spinigera Townsend (Diptera: Tachinidae) to its Host, Neodiprion swainei Midd. (Hymenoptera: Diprionidae)

1962 ◽  
Vol 94 (8) ◽  
pp. 809-818 ◽  
Author(s):  
H. A. Tripp
Keyword(s):  
Population Dynamics ◽  
Pinus Banksiana ◽  
Jack Pine ◽  
Immature Stages ◽  
Pine Sawfly ◽  
Factors Influencing ◽  
Form Part ◽  
Extensive Program ◽  
Relationship Of ◽  
The Relationship

Studies on the parasites of the Swaine jack pine sawfly, Neodiprion swainei Midd., form part of an extensive program designed to assess the factors influencing population dynamics of this important defoliator of jack pine, Pinus banksiana Lamb. Investigations were carried out in the Province of Quebec between 1955 and 1959 near the headwaters of the Gatineau River, Abitibi County, and continued during 1960 and 1961 near the source of the Vermillion River, County Laviolette. In both areas, one of the principal parasites associated with N. swainei was the tachinid, Spathimeigenia spinigera Townsend. Descriptions of the immature stages of this parasite, and details of its behaviour were published previously (Tripp, 1960).

POTENTIAL OF ANTIFEEDANTS TO CONTROL LARVAL FEEDING OF SELECTED NEODIPRION SAWFLIES (HYMENOPTERA: DIPRIONIDAE)

1976 ◽  
Vol 108 (11) ◽  
pp. 1137-1144 ◽  
Author(s):  
J. N. All ◽  
D. M. Benjamin
Keyword(s):  
Pinus Banksiana ◽  
Feeding Habits ◽  
Field Tests ◽  
Field Studies ◽  
Jack Pine ◽  
Larval Feeding ◽  
Pine Sawfly ◽  
European Pine Sawfly ◽  
Feeding Development ◽  
Laboratory Bioassays

AbstractAntifeedants for controlling larval feeding of several Neodiprion sawflies were evaluated in laboratory and field studies. Nine commercially available insect antifeedants and a hexane extract of the juvenile foliage of jack pine, Pinus banksiana Lambert, were tested on larvae of six species. In laboratory bioassays larvae exhibited varying sensitivity to antifeedants; generally species with monophagous or restricted oligophagous feeding habits were most sensitive. In the laboratory the Swaine jack pine sawfly, Neodiprion swainei Middleton, had severely restricted feeding, development, survival, and fecundity. Triphenyltin hydroxide was toxic to N. swainei and to European pine sawfly, N. sertifer (Geoffroy). In field tests certain antifeedants disrupted N. swainei feeding and development. The colonial behavior of larvae often was disrupted and solitary larvae fell from trees or wandered on twigs. Colony disruption by most antifeedants was temporary and many larvae resumed feeding.

Influence of Temperature and Relative Humidity on the Life-span of Adults of the Swaine Jack-pine Sawfly, Neodiprion swainei Middleton (Hymenoptera: Diprionidae)

1966 ◽  
Vol 98 (8) ◽  
pp. 789-794 ◽  
Author(s):  
J. G. Pilon
Keyword(s):  
Relative Humidity ◽  
Linear Regression ◽  
Life Span ◽  
Linear Equation ◽  
Jack Pine ◽  
Influence Of Temperature ◽  
Pine Sawfly ◽  
Non Linear Equation ◽  
Non Linear

AbstractThe life -span of Swaine jack-pine sawfly adults was studied under various constant and alternating temperatures and at four different values of relative humidity. Temperature significantly influenced the life-span of both sexes according to a non-linear equation, and relative humidity according to a linear regression. The influence of temperature varied with relative humidity in the case of males but not in the case of females. The life-span of both sexes was shorter at alternating temperatures than at constant temperatures.

The Spatial Distribution of Cocoons of Neodiprion swainei Middleton in a Jack Pine Stand: I. A Cartographic Analysis of Cocoon Distribution, With Special Reference to Predation by Small Mammals

1966 ◽  
Vol 98 (4) ◽  
pp. 430-447 ◽  
Author(s):  
J. M. McLeod
Keyword(s):  
Spatial Distribution ◽  
Special Reference ◽  
Small Mammals ◽  
Forest Floor ◽  
Jack Pine ◽  
Tree Density ◽  
Pine Sawfly ◽  
Insight Into

AbstractInsight into the source of aggregation in the spatial distribution of cocoons of the Swaine jack-pine sawfly, Neodiprion swainei Middleton was gained by the use of special techniques enabling the sampling of units of forest floor in contiguous 2 × 2-inch square samples, as well as by randomized one-square-foot samples taken over a larger area. It was concluded that cocoon distribution is initially random but marked aggregation results from the subsequent transportation of cocoons into feeding stations by predacious small mammals, mostly of the genus Sorex. The feeding stations tended to be distributed near decaying stems and stumps on the forest floor, a factor which augmented the extent of aggregation. Of cocoons not preyed upon by small mammals, slightly higher counts were recorded directly under crown canopies as opposed to open areas, at a tree density of approximately 920 per acre.

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