Economic Impact of Hessian Fly (Diptera: Cecidomyiidae) on Spring Wheat in Oregon and Additive Yield Losses with Fusarium Crown Rot and Lesion Nematode

• Published in: Journal of economic entomology 2004-04, Vol.97 (2), p.397-408
• Main Authors: Smiley, Richard W., Gourlie, Jennifer A., Whittaker, Ruth G., Easley, Sandra A., Kidwell, Kimberlee K.
• Format: Article
• Language: English
• Subjects: aldicarb; Animals; Biological and medical sciences; Control; crop damage; crop losses; crop quality; crown rot; cultivars; Diptera; economic analysis; FIELD AND FORAGE CROPS; Fundamental and applied biological sciences. Psychology; Fusarium; Fusarium pseudograminearum; Generalities; genetic resistance; grain yield; insect pests; Mayetiola destructor; Nematoda; pest resistance; Phytopathology. Animal pests. Plant and forest protection; Plant Diseases - economics; plant pathogenic fungi; Pratylenchus neglectus; Pratylenchus thornei; Protozoa. Invertebrates; root lesion nematodes; spring wheat; Triticum - economics; Triticum - microbiology; Triticum - parasitology; Triticum aestivum; yield loss assessment
• ISSN: 0022-0493; 1938-291X
• DOI: 10.1603/0022-0493-97.2.397

Damage caused by Hessian fly, Mayetiola destructor (Say), was quantified in spring wheat, Triticum aestivum L., trials near Pendleton and Moro, OR, during 2001 and 2002. Five field experiments were established to examine genetic resistance to Fusarium crown rot, Fusarium pseudograminearum (O’Donnell & Aoki), and economic damage by lesion nematode, Pratylenchus neglectus (Rensch, 1924) (Filipjev Schuurmanns & Stekhoven, 1941) and Pratylenchus thornei (Sher & Allen, 1941). Hessian fly became the dominant factor affecting grain yield in four experiments. Genotypes carrying the H3-resistance gene had grain yields 66 and 68% higher than susceptible genotypes in cultivar trials during 2001 and 2002, respectively. Yield reductions were detected when Hessian fly infestation rates exceeded 50% plants during 2001 and 15% plants (8% tillers) during 2002. In two trials during 2001, in-furrow application of aldicarb (Temik) at planting improved yields of four Hessian fly-susceptible cultivars by 72 and 144% (up to 1,959 kg/ha) and yields of one Hessian fly-resistant cultivar by 2 and 3%. Resistant cultivars and aldicarb improved grain quality as much as two market grades during 2001. The value of increased grain production with Hessian fly-resistant cultivars in four field experiments ranged from $112 to $252/ha, excluding price incentives for improved market quality. Yield reduction due to combined damage from Hessian fly and either Fusarium crown rot or lesion nematode was additive. This report seems to be the first quantitative yield loss estimate for Hessian fly in spring wheat in the semiarid environment of the inland Pacific Northwest.