Biology and Development of the Wild and Golden Sport of Grapholita prunivora (Lepidoptera: Tortricidae)

The development of the lesser appleworm, Grapholita prunivora (Walsh), was studied using immature apples as the food source. Degree-hour developmental rates for all life stages were calculated. Developmental rates in degree-hours at 25°C for the eggs, four instars, pupae, and adults were 1,503 (4 d)...

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Bibliographic Details
Published in:Environmental entomology 2004-06, Vol.33 (3), p.506-512
Main Authors: Neven, L. G, Mantey, K. D
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Animals
apples
Biological and medical sciences
degree-hours
Demecology
developmental stages
Fundamental and applied biological sciences. Psychology
Grapholita
Grapholita prunivora
heat sums
insect biology
insect development
insect growth
insect pests
insect rearing
insect reproduction
Insecta
Invertebrates
lesser apple worm
Life cycle. Embryology. Development
Malus domestica
mating behavior
mortality
PHYSIOLOGICAL ECOLOGY
Physiology. Development
Protozoa. Invertebrata
strain differences
temperature
thermal threshold
Tortricidae
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Summary:The development of the lesser appleworm, Grapholita prunivora (Walsh), was studied using immature apples as the food source. Degree-hour developmental rates for all life stages were calculated. Developmental rates in degree-hours at 25°C for the eggs, four instars, pupae, and adults were 1,503 (4 d), first larval ecdysis 1,109 (3 d posthatch), second larval ecdysis 1,941 (5 d posthatch), third larval ecdysis 3,186 (8 d posthatch), pupation 5,196 (13 d posthatch), and adult 8,925 (22 d posthatch), respectively. It was determined that 8.5°C was the lower thermal threshold for development of lesser appleworm eggs. Comparisons of growth, survival, and reproduction were made between two different laboratory populations, the wild type and a golden color sport (strain).
ISSN:0046-225X
1938-2936
DOI:10.1603/0046-225X-33.3.506