Submitted to: Entomology Society of America Pacific Branch Meeting
Publication Type: Abstract Only
Publication Acceptance Date: 2/18/2005
Publication Date: 2/19/2005
Citation: Yokoyama, V.Y. 2005. Big bale compression for control of hessian fly in exported hay. Entomology Society of America Pacific Branch Meeting, March 19, 2005, Pacific Grove, California.
Technical Abstract: Quarantine strategies were developed to control Hessian fly, Mayetiola destructor (Say), in hay exported to Japan and other countries in the Pacific Rim. Hessian fly was reared on wheat seedlings (n = 15,215) to the puparial stage, harvested, and placed into each of two pockets of fabric bags (120 cm wide by 120 cm long by 78 cm high) (n = 48). The infested wheat seedlings were transported to Ellensburg, Washington, April 2004 to determine the effect of compression on insect survival using a new baling technique. The infested wheat seedlings in fabric bags were placed in the baler compression chamber (32 kg/cm² of pressure) with chopped timothy hay, compressed into large bales (120 cm wide by 120 cm long by 78 cm high), and wrapped with polypropylene fabric. The compressed wheat seedlings were recovered from the bales and immediately returned to the laboratory in Parlier, CA, and placed on moist vermiculite for evaluation of survival for 83 d. The total number of Hessian fly puparia (n = 24,344) tested was determined from adult emergence from controls (1.6 puparia per plant) not exposed to compression, and 3.0% of the total number survived bale compression. Compression alone was found to be an efficacious treatment to control large numbers of Hessian fly puparia introduced into large-size, polypropylene fabric-wrapped bales.