Journal of Nematology (2006) 38, 265-266

D. Carpenter, K.S. Lawrence and T.V. Boozer (2006)
Efficacy of abermectin on Rotylenchulus reniformis nematode development on cotton in various soil types
Journal of Nematology 38 (2), 265-266
Abstracts of Society of Nematologists 45th Annual Meeting, Lihue, Hawaii, 18-21 June 2006
Abstract: Variations in the efficacy of the seed treatment abermectin have been observed in R. reniformis infested cotton fields across the southeast. This study examines the rate of development of the reniform nematode over time as effected by abermectin treated and non treated cotton seed planted in difference soil types. Two replicated greenhouse trials were conducted at the Plant Science Research Center at Auburn University. Root samples were processed at 3, 6, 9, 14, 19, 25, and 35 days after inoculation (DAI) to determine life stage development, number of nematodes per gram of root and numbers of egg masses. The life stages attained by R. reniformis were slowed by the abermectin seed treatment as compared to the untreated control in the Decatur silty loam soil. Forty-seven percent of the population of the reniform in the untreated control treatment advanced to stage B, the open C shape with an enlarged vulva region at 6 DAI as compared to only 19% in the abermectin. The typical reniform shaped females without egg masses were observed at 9 DAI in the untreated control but not until 14 DAI in the abermectin treatment. The mature reniform-shaped females with egg masses were observed at 25 DAI in both treatments. The highest percentage of mature egg-laying females and secondary infections were observed in both abermectin and control treatments at 35 DAL The initial life stage development of the reniform nematode appears to be delayed in the presence of abermectin.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Kathy S. Lawrence

Research topic(s) for pests/diseases/weeds:
control - general

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Rotylenchulus reniformis	Cotton (Gossypium)	U.S.A. (SE)