MITES ASSOCIATED WITH APPLE IN NOVA SCOTIA

1970 ◽  
Vol 102 (2) ◽  
pp. 172-174 ◽  
Author(s):  
Aly H. Rasmy ◽  
A. W. MacPhee
Keyword(s):  
Nova Scotia ◽  
Apple Trees ◽  
Annapolis Valley

AbstractFifty-seven species of 27 families of mites associated with apple trees in Annapolis Valley, Nova Scotia, were recorded. Five species were phytophagous, 34 species were presumably predacious, and 18 species were presumably scavengers and fungus feeders.

POPULATION STUDIES ON THE WINTER MOTH OPEROPHTERA BRUMATA (L.) (LEPIDOPTERA: GEOMETRIDAE) IN APPLE ORCHARDS IN NOVA SCOTIA

1988 ◽  
Vol 120 (1) ◽  
pp. 73-83 ◽  
Author(s):  
A. MacPhee ◽  
A. Newton ◽  
K.B. McRae
Keyword(s):  
Nova Scotia ◽  
Deciduous Trees ◽  
Operophtera Brumata ◽  
Apple Trees ◽  
Moth Population ◽  
Winter Moth ◽  
Introduced Pest ◽  
Apple Production ◽  
Annapolis Valley ◽  
Natural Dispersal

AbstractThe winter moth Operophtera brumata (L.) is a serious introduced pest of apple trees in Nova Scotia. It spread westward through orchards of the Annapolis Valley in the 1950’s and to other deciduous trees throughout Nova Scotia later. The parasites Cyzenis albicans (Fall.) and Agrypon flaveolatum (Grav.) were liberated during 1961 in Nova Scotia and gradually spread throughout the winter moth population. Population dynamics studies were conducted in insecticide-free orchards and corroborated with observations in neglected unsprayed apple trees over a wide area. The winter moth population reached a balanced level in unsprayed orchards at varying densities below the limits of its food supply, but well above an acceptable level for commercial apple production. In young orchards, where trees cover a small percentage of the ground, natural dispersal of larvae appeared to be a suppressing factor. In mature orchards mortality was density dependent during the prepupal to adult stage; mortality was partly due to parasitism and predation but also to other factors.

MORTALITY IN APPLE MEALYBUG, PHENACOCCUS ACERIS (HOMOPTERA: COCCIDAE), POPULATIONS IN NOVA SCOTIA

1967 ◽  
Vol 99 (7) ◽  
pp. 728-730 ◽  
Author(s):  
Hari S. Chachoria
Keyword(s):  
Nova Scotia ◽  
Personal Communication ◽  
Apple Trees ◽  
Annapolis Valley

The apple mealybug, Phenacoccus aceris Sig., has been a pest of apple trees periodicallv since an outbreak was reported by Gilliatt in 1935. The writer investigated mortality in its population during the summer of 1966 in connection with the current sporadic outbreak in the Annapolis Valley. Decline of outbreaks was attributed bv Marshall and Pickett (1944) to attacks by the parasite Allotropa utilis (Mues.) (Hymenoptera: Platygasteridae), and the abundance of this parasite in the current upsurge in mealybugs suggests it is an important factor. Mr. K. H. Sanford (personal communication) estimated approximately 58% of the mealybugs in the winter of 1965–1966 and about 80% in the winter of 1966–1967 were parasitized by this species.

Annotated List of Spiders (Araneae) from Apple Trees in Nova Scotia

1956 ◽  
Vol 88 (12) ◽  
pp. 697-700 ◽  
Author(s):  
C. D. Dondale
Keyword(s):  
Nova Scotia ◽  
General Nature ◽  
Control Methods ◽  
Apple Trees ◽  
Annotated List ◽  
Main Factors ◽  
Annapolis Valley ◽  
Orchard Pests ◽  
Pest Control Methods

Orchard spiders are important because of their predatory activities and their frequent abundance. They were recngnizcd as a group needing study at the time Pickett et al. (1946) began their long-term investigation of orchard fauna. The identities of the species involved, and their influence on populations of orchard pests, are the main factors to be considered.This paper presents a list of the species collected in the Annapolis Valley of Nova Scotia to date, together with brief comments of a general nature. Spiders have been collected in about 40 orchards since 1954. These orchards were subjected to a variety of cultural and pest control methods by the owners, but most were in sod cultivation, and under modified spray programs as described by Pickett and Patterson (1953). Collecting was done mainly by capping lower branches of trees over an inverted, open umbrella, hut specimens were also taken individually from crevices along tree trunks, and from trays under fumigated trees.

The Brown Mite, Bryobia arborea Morgan and Anderson (Acarina: Tetranychidae), on Apple in Nova Scotia.: I. Influence of Intratree Distribution on the Selection of Sampling Units. II. Differences in Habits and Seasonal Trends in Orchards With Bivoltine and Trivoltine Populations. III. Distribution of Diapause Eggs. IV. Hatching of Diapause Eggs

1965 ◽  
Vol 97 (12) ◽  
pp. 1303-1318 ◽  
Author(s):  
H. J. Herbert
Keyword(s):  
Nova Scotia ◽  
First Generation ◽  
Second Generation ◽  
Central Area ◽  
Third Generation ◽  
Apple Trees ◽  
Seasonal Trends ◽  
Sample Unit ◽  
The Third ◽  
Selection Of

AbstractIn Nova Scotia one leaf cluster with an adjoining 1 inch of twig taken from the inside of each of 10 apple trees replicated four times is an adequate sample unit to measure the density of the brown mite.The brown mite has one generation with a partial second in some orchards and one with a partial second and partial third in others. The first generation adults in the bivoltine and trivoltine populations lay summer eggs on the leaves and twigs, and diapause eggs on tin twigs. The second generation adults in the bivoltine populations lay only diapause eggs; in the trivoltine populations they lay both summer and diapause eggs. The adults of the third generation lay only diapause eggs.The brown mite is found on both the leaves and woody parts of the tree. In orchards with bivoltine populations the proportion of mites on leaves reached a peak of 80% by mid-July, but thereafter gradually decreased to 10% by the end of August. However, in orchards with trivoltine populations the proportion of mites on leaves reached a peak of 80 to 90% by mid-July, remained constant until mid-August, and thereafter decreased to approximately 40% by the end of August.The number of diapause eggs laid by adults of each generation in both the bivoltine and trivoltine populations varies widely. The eggs are deposited on the trunk as well as on the branches, with the heaviest deposition in the central area of the tree. The diapause eggs laid by adults of the first generation are the last to hatch and those laid by the third generation are the first to hatch the following spring.The factors responsible for the differences in the number of generations and in the number of diapause eggs laid are unknown.

scholarly journals A New Look at Cultivar Preference in Hoplocampa testudinea (Hymenoptera: Tenthredinidae) on Apple in the Annapolis Valley of Nova Scotia, Canada

Insects ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 769
Author(s):  
Suzanne Blatt ◽  
Kim Hiltz
Keyword(s):  
Nova Scotia ◽  
Physicochemical Properties ◽  
Larval Survival ◽  
Larval Performance ◽  
Differential Survival ◽  
Eastern Canada ◽  
Weak Evidence ◽  
Important Pest ◽  
Annapolis Valley ◽  
Hoplocampa Testudinea

(1) Background: The European apple sawfly, Hoplocampa testudinea Klug (Hymenoptera: Tenthredinidae), can be an economically important pest in eastern Canada and shows preference for apple cultivars in Nova Scotia, Canada. We hypothesized that this preference could be due to oviposition by female H. testudinea (preference-performance hypothesis) during the bloom period or differential larval survival during development due to fruitlet physicochemical properties. (2) Methods: Fifteen commercial and experimental apple (Malusdomestica Borkh.; Rosaceae) cultivars located at the Kentville Research and Development Centre (Kentville, Nova Scotia) were chosen and examined for H. testudinea oviposition, larval performance during fruitlet development, fruitlet physicochemical properties and damage assessment at harvest from 2016–2019, inclusive. (3) Results: H. testudinea showed significant cultivar preference during oviposition, during development and at harvest, but the ranking of these cultivars was not the same throughout the season. Total impact by H. testudinea was consistent for most cultivars over multiple years of the study. (4) Conclusion: Correlation of oviposition with damage provided weak evidence for the preference-performance hypothesis. We propose that this relationship is weak due to differential survival of larvae during development.

A Fungous Enemy of the Pea Aphid, Macrosiphum pisi (Kaltenbach)

1955 ◽  
Vol 87 (11) ◽  
pp. 503-505 ◽  
Author(s):  
D. M. MacLeod
Keyword(s):  
Nova Scotia ◽  
Fungal Growth ◽  
Fungal Disease ◽  
Pea Aphid ◽  
Large Numbers ◽  
Annapolis Valley ◽  
Orchard Pests

During an investigation into the importance of fungal disease as a factor in the control of orchard pests throughout the Annapolis Valley, Nova Scotia, the haemocoele of large numbers of Macrosiphum pisi (Kaltenbach) was found to be infected with a fungal growth that resulted in death. This fungus was identified from mounted specimens as Empusa (= Entomophthora) aphidis Hoffman.

scholarly journals Evidence for the Collection of a Reddish Egret (Egretta rufescens) in Nova Scotia During the 19th Century and its Association with the McCulloch Collection of Birds

2013 ◽  
Vol 126 (4) ◽  
pp. 328
Author(s):  
Eric L. Mills
Keyword(s):  
Nova Scotia ◽  
19Th Century ◽  
Historical Evidence ◽  
Historical Society ◽  
Egretta Rufescens ◽  
Annapolis Valley ◽  
The 19Th Century ◽  
Nova Scotian ◽  
Lines Of Evidence ◽  
Thomas Mcculloch

Based on several lines of evidence, a specimen of an adult white-morph Reddish Egret (Egretta rufescens) now on display in the Macdonald Museum of the Annapolis Valley Historical Society in Middleton, Nova Scotia, probably originated from the 19th-century Nova Scotian bird collections of Thomas McCulloch senior (1776–1843) and his son Thomas (1809–1865), likely between 1838 and 1865. The only other records of this species in Canada are sightings in Nova Scotia in 1965 and 1966. This may therefore be the first specimen evidence of the species in Nova Scotia and Canada. Historical evidence links the specimen with the McCulloch collection of birds, part of which has survived at Dalhousie University.

NATURAL CONTROL OF THE GREY BANDED LEAF ROLLER EULIA MARIANA FERN, IN NOVA SCOTIA ORCHARDS

1937 ◽  
Vol 69 (7) ◽  
pp. 145-146
Author(s):  
F. C. Gilliatt
Keyword(s):  
Nova Scotia ◽  
Natural Control ◽  
Leaf Roller ◽  
Control Factors ◽  
Annapolis Valley ◽  
Orchard Pests

Eulia mariana Fern. was identified in Annapolis Valley orchards about twelve years ago and since has become one of the major orchard pests. Although outbreaks continue to occur, fruit growers should fully appreciate the value of natural control, which in one form or another is always assisting in keeping this insect in check. The various natural control factors may be recorded as follows:(1) Mortality of pupae. (2) Parasites of larvae and pupae. (3) Parasites of eggs. (4) Predators.

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