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1 June 2004 Biology and Development of the Wild and Golden Sport of Grapholita prunivora (Lepidoptera: Tortricidae)
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Abstract

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).

L. G. Neven and K. D. Mantey "Biology and Development of the Wild and Golden Sport of Grapholita prunivora (Lepidoptera: Tortricidae)," Environmental Entomology 33(3), 506-512, (1 June 2004). https://doi.org/10.1603/0046-225X-33.3.506
Received: 31 October 2003; Accepted: 1 February 2004; Published: 1 June 2004
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