Translator Disclaimer
1 June 2001 Apple Damage, Pest Phenology, and Factors Influencing the Efficacy of Tebufenozide for Control of Obliquebanded Leafroller (Lepidoptera: Tortricidae)
Author Affiliations +
Abstract

Fruit damage by obliquebanded leafroller, Choristoneura rosaceana (Harris), was examined on four different apple cultivars during 1997–1999 in heavily infested orchards in New York State. Initial fruit damage occurred 354 ± 26 degree-days base 6°C (DD6) after the first moth catch from the overwintering generation and continued to increase until after the typical spray season (≈1,300 DD6). In addition to apple damage by late instars, fruit damage occurred by early instars of the summer and overwintering generations. The insect growth regulator tebufenozide was used as a model insecticide to determine how a slow-acting insecticide and its relative toxicity to early (neonate) and late (fourth and fifth) instars may influence the efficacy of sprays for the control of the obliquebanded leafroller. Because tebufenozide is a slow-acting compound, bioassays were conducted to determine what percentage of the total mortality to neonates occurs at each 24 h interval until 10 d. Based on a polynomial regression, half of the total mortality to larvae at the LC25, LC50, LC90, and LC99 occurred at 7.2, 5.0, 4.1, and 3.0 d, respectively. Late instars were three times more tolerant to tebufenozide than neonates.

Daniel E. Waldstein and W. H. Reissig "Apple Damage, Pest Phenology, and Factors Influencing the Efficacy of Tebufenozide for Control of Obliquebanded Leafroller (Lepidoptera: Tortricidae)," Journal of Economic Entomology 94(3), 673-679, (1 June 2001). https://doi.org/10.1603/0022-0493-94.3.673
Received: 20 March 2000; Accepted: 1 February 2001; Published: 1 June 2001
JOURNAL ARTICLE
7 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top