Mardi Gras Ballroom Salons A, B, C & D (New Orleans Marriott)
Wednesday, January 10, 2007
4:30 PM - 10:00 PM
Mardi Gras Ballroom Salons A, B, C & D (New Orleans Marriott)
Thursday, January 11, 2007
10:00 AM - 10:00 PM
Mardi Gras Ballroom Salons A, B, C & D (New Orleans Marriott)
Friday, January 12, 2007
8:00 AM - 5:00 PM

Effect of Host Plants on Seasonal Abundance of Lygus Bugs in the Texas High Plains

Megha N. Parajulee, Apurba K. Barman, and Stanley C. Carroll. Texas Agricultural Experiment Station, 1102 East FM 1294, Lubbock, TX 79403

Abundance of Lygus bugs in five different reported hosts were evaluated in experimental fields at Lubbock, TX. Two consecutive year of field study (2005 and 2006) showed that Lygus bugs were most abundant in alfalfa and Russian thistle followed by pigweed. Cotton was never been a choice of hosts in presence of aforementioned three hosts. As many as 50 adults/50 sweeps were recovered in both Russian thistle and alfalfa during the sampling season of 2005. Similarly, 30-35 adults/50 sweeps were observed in these two hosts in 2006. Alfalfa and Russian thistle were also most favorable hosts for reproductive colonization, as evidenced by the presence of 60-70 nymphs/50 sweeps in both 2005 and 2006. Predominant Lygus species in the region was L. hesperus (97%), followed by a small percentage of L. elisus (2%) and L. lineolaris (1%). Weed hosts, such as Russian thistle can be used as an indicator species for Lygus intrusion and subsequent breeding near cotton fields. Growth stages of hosts and weather variation might have significant influence in seasonal abundance and reproduction of Lygus in respective hosts.