Notes on the Biology of the Pitted Ambrosia Beetle, Corthylus punctatissimus (Coleoptera: Scolytidae), in Ontario and Quebec

1967 ◽  
Vol 99 (1) ◽  
pp. 49-54 ◽  
Author(s):  
R. J. Finnegan

AbstractThe pitted ambrosia beetle, Corthylus punctatissimus (Zimm.), was studied during widespread infestations in sugar maple (Acer saccharum Marsh.) stands of southern Ontario and Quebec. A brief description of each stage of the insect is given, and its life history and habits, as well as the damage caused to the host plant are discussed.


2001 ◽  
Vol 31 (9) ◽  
pp. 1481-1490 ◽  
Author(s):  
J A McLaughlin

This study investigated the species, geographic distribution, host range, site relationships, and impacts of Armillaria in central and southern Ontario. Rhizomorphs and infected wood samples were collected at 110 of 111 sites. Six species were identified by polymerase chain reaction or diploid–haploid pairings. Armillaria gallica Marxmuller & Romagn. was most commonly isolated and had the broadest host range. It was seldom isolated from conifers but often from oaks. It was the species most often found on moist sites and showed strong preference for calcareous soils. Armillaria calvescens Bérubé & Dessureault was rarely isolated from conifers but often from maples, where it commonly caused butt rot. It was found most often on coarse loamy or fine, well-drained, fresh sites. Armillaria ostoyae (Romagn.) Herink. had the second broadest host range. It was seldom found on sugar maple (Acer saccharum Marsh.) but dominated on conifers, especially on dry–fresh, rapidly drained sandy to coarse loamy sites. It was not found on sites with finer soils. Armillaria sinapina Bérubé & Dessureault and Armillaria gemina Bérubé & Dessureault were found in more northerly parts of the study area on noncalcareous sites. Armillaria sinapina often caused butt rot and was often found on poorly drained sites. Armillaria gemina was found only on hardwoods. Armillaria mellea (Vahl:Fr.) Kummer s.st. was found on dead hardwoods at four locations.



1998 ◽  
Vol 101 (3) ◽  
pp. 381-390 ◽  
Author(s):  
S.A Watmough ◽  
T.C Hutchinson ◽  
E.P.S Sager


1998 ◽  
Vol 88 (1) ◽  
pp. 83-92 ◽  
Author(s):  
D. A. J. Teulon ◽  
T. C. Leskey ◽  
E. A. Cameron

AbstractThe pear thripsTaeniothrips inconsequens(Uzel) was sampled for four years in a small sugar mapleAcer saccharumplantation in Centre County, Pennsylvania, USA. The life cycle ofT. inconsequenswas univoltine with the main period of emergence and flight from late March to mid May. Adults, eggs, and first and second instar larvae were associated with sugar maple budburst and early leaf development from late April to late May. Larval drop occurred from mid to late May. Mature second instar larvae, propupae, pupae and adults spent from June to March in the ground; development from larva to adult occurred between September and November. From March to May most (usually >90%) thrips adults and larvae sampled wereT. inconsequens.NoT. inconsequensmales were found. In soil samples taken in spring, summer and autumnT. inconsequenswere found to a depth of 50 cm but over 87% were in the top 20 cm. Almost noT. inconsequenswere found in the litter layer. Large variations inT. inconsequensadult emergence and larval drop were recorded. The most important contributing factors in fluctuations ofT. inconsequenspopulations were the length of sugar maple budburst, the degree of synchrony between thrips emergence and sugar maple budburst, and the occurence of sugar maple flowering.



2020 ◽  
Vol 52 (3) ◽  
pp. 292-297
Author(s):  
Tara Lee Bal ◽  
Katherine Elizabeth Schneider ◽  
Dana L. Richter


2017 ◽  
Vol 129 (2) ◽  
pp. 209-221 ◽  
Author(s):  
Amritpal S. Singh ◽  
A. Maxwell P. Jones ◽  
Mukund R. Shukla ◽  
Praveen K. Saxena


Author(s):  
Marcin W. Zielonka ◽  
Tom W. Pope ◽  
Simon R. Leather

Abstract The carnation tortrix moth, Cacoecimorpha pronubana (Hübner, [1799]) (Lepidoptera: Tortricidae), is one of the most economically important insect species affecting the horticultural industry in the UK. The larvae consume foliage, flowers or fruits, and/or rolls leaves together with silken threads, negatively affecting the growth and/or aesthetics of the crop. In order to understand the polyphagous behaviour of this species within an ornamental crop habitat, we hypothesized that different host plant species affect its life history traits differently. This study investigated the effects of the host plant species on larval and pupal durations and sizes, and fecundity (the number of eggs and the number and size of egg clutches). At 20°C, 60% RH and a 16L:8D photoperiod larvae developed 10, 14, 20 and 36 days faster when reared on Christmas berry, Photinia (Rosaceae), than on cherry laurel, Prunus laurocerasus (Rosaceae), New Zealand broadleaf, Griselinia littoralis (Griseliniaceae), Mexican orange, Choisya ternata (Rutaceae), and firethorn, Pyracantha angustifolia (Rosaceae), respectively. Female pupae were 23.8 mg heavier than male pupae, and pupal weight was significantly correlated with the duration of larval development. The lowest and the highest mean numbers of eggs were produced by females reared on Pyracantha (41) and Photinia (202), respectively. Clutch size differed significantly among moths reared on different host plants, although the total number of eggs did not differ. This study showed that different ornamental host plants affect the development of C. pronubana differently. Improved understanding of the influence of host plant on the moth's life history parameters measured here will help in determining the economic impact that this species may have within the ornamental plant production environment, and may be used in developing more accurate crop protection methodologies within integrated pest management of this insect.





2015 ◽  
Vol 45 (6) ◽  
pp. 632-638 ◽  
Author(s):  
Kim Bannon ◽  
Sylvain Delagrange ◽  
Nicolas Bélanger ◽  
Christian Messier

Studies have reported divergent results on the effect of soil fertility and canopy opening on understory density and growth of sugar maple (AS; Acer saccharum Marsh.) and American beech (FG; Fagus grandifolia Ehrh.). The main objective of this study was to evaluate the effect of a gradient of canopy opening and soil fertility on the density and growth of AS and FG saplings in southwestern Quebec, Canada. We investigated 56 stands containing both AS and FG that were subjected to different disturbance history types (DHTs) (UF, unmanaged forest; PC, partial cut; and CC, clearcut) on various soil types. AS and FG absolute and relative sapling density varied greatly among the 56 stands; however, no significant effects of DHT, soil nutrient availability, or their interaction were found. Both species responded positively in terms of radial growth to canopy openings, with FG growth being slightly better than AS growth in PC stands compared with other canopy treatments. Contrary to our hypothesis, AS did not show significantly higher growth than FG following clear-cutting. These results do not support the idea that AS abundance and growth could be promoted by increasing the intensity of the canopy opening during harvest, at least on the generally acidic and base-poor soils that were investigated.





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