Insecticide Evaluation for Control of the Imported Fire ANT in Floyd County, Georgia, 1990

Abstract Treatments were evaluated for RIFA control as a dry powder over the top of active mounds or as baits sprinkled around the base of acitve mounds. Each circular plot was. permanently marked with an orange surveyor stake and measured 0.2 acre. Three replicates were used for each treatment. Pretreatment counts were taken on 12 Jun in the 0.1 acre inner circle of each plot. Posttreatment counts of active mounds in the 0.1 acre inner circle were made on 11 Jul and 14 Aug, Treatments were made beginning at 4:00 pm on 12 Jun. The average soil temperature was 85°F.</jats:p

Insecticide Evaluation for Control of the Imported Fire Ant in Bibb County, Ga, 1993

Abstract Two broadcast baits, Amdro® and Logic®, were broadcast over respective 2.2 acre plots on 27 May. A Herd Seeder mounted on a Honda ATC was used to apply the baits at 1.5 lb/acre. A third plot (2 acres) was left untreated as a control plot. Applications were made at 5:00 pm. Each plot contained five 0.1 acre circular subplots. These plots were marked with orange surveyor stakes. Pretreatment counts were made on 27 May inside the fifteen subplots. Posttreatment counts were made inside the same fifteen subplots on 27 Jun, 30 Jul, 31 Aug, 29 Sep, 13 Oct, and 17 Nov.</jats:p

Insecticide Evaluation for Control of the Imported Fire Ant in Houston County, Ga, 1991

Abstract Two 1/10 acre subplots were permanently established in each of nine 1 acre plots. Eight products, four granular and four sprays, were broadcast over one acre plot each. The granular products were applied with a ground-driven Quaker Lawn Spreader pulled behind a John Deere 850 Lawn Tractor. Sprays were applied in 55 gallons of water per acre using a pull-behind sprayer with a 20 ft boom. These applications were made on 1 Aug. Approximately 0.2 inches of rain fell on the area within twelve h. Another 0.8 inches of rain fell within 24 h of the treatment. Posttreatment counts were made in the subplots on 7 Aug, 4 Sep, 23 Oct, 26 Nov, and 12 May.</jats:p

Insecticide Evaluation for Control of the Red Imported Fire ANT in Houston County, GA, 1990

Abstract Seven treatments, replicated 3 times, were evaluated for RIFA control. Each plot was 0.25 acre in size and circular. Each was marked with an orange surveyor stake at its center. Pretreatment mound counts were made in the central 0.15 acre (subplot) of the larger 0.25 acre circle on 6 Aug. Posttreatment counts were made on 9 Aug (3 d), 14 Aug (8 d), 9 Sep (1 month), and 2 Oct (2 month).</jats:p

Insecticide Evaluation for Control of the Red Imported Fire Ant in Tift County, GA, 1991:

Abstract Plots were 0.15 acre circles marked by an orange surveyor stake in the center. Pretreatment mound counts were made in the central 0.1 acre (subplot) of the larger 0.15 acre circle on 24 Jun. Posttreatment counts were made on 1 Jul (1 wk), 30 Jul (5 wk), 3 Sep (10 wk), and 22 Nov (21 wk). Three replicates were used for each treatment. Treatments were applied between 9:30 am and 3:30 pm when the soil temperature averaged 85°F.</jats:p

Thysanoptera of Southeastern U.S.A.: A checklist for Florida and Georgia

A list is presented of 275 species of the Order Thysanoptera known from Florida and 202 species from Georgia; only 122 of these species are from both states. The list was compiled from museum collections, literature reviews, and records of recent introductions. More than 60 exotic species are from the Caribbean basin, with a few recently introduced species from the Oriental region. The lack of available North American faunal information concerning thrips is emphasized (this being derived from haphazard collecting and in only a few areas), as well as the lack of reliable literature for identifying native North American Thysanoptera.</jats:p

Temporal Effects of a Begomovirus Infection and Host Plant Resistance on the Preference and Development of an Insect Vector, Bemisia tabaci, and Implications for Epidemics.

Persistent plant viruses, by altering phenotypic and physiological traits of their hosts, could modulate the host preference and fitness of hemipteran vectors. A majority of such modulations increase vector preference for virus-infected plants and improve vector fitness, ultimately favouring virus spread. Nevertheless, it remains unclear how these virus-induced modulations on vectors vary temporally, and whether host resistance to the pathogen influences such effects. This study addressed the two questions using a Begomovirus-whitefly-tomato model pathosystem. Tomato yellow leaf curl virus (TYLCV) -susceptible and TYLCV-resistant tomato genotypes were evaluated by whitefly-mediated transmission assays. Quantitative PCR revealed that virus accumulation decreased after an initial spike in all genotypes. TYLCV accumulation was less in resistant than in susceptible genotypes at 3, 6, and 12 weeks post inoculation (WPI). TYLCV acquisition by whiteflies over time from resistant and susceptible genotypes was also consistent with virus accumulation in the host plant. Furthermore, preference assays indicated that non-viruliferous whiteflies preferred virus-infected plants, whereas viruliferous whiteflies preferred non-infected plants. However, this effect was prominent only with the susceptible genotype at 6 WPI. The development of whiteflies on non-infected susceptible and resistant genotypes was not significantly different. However, developmental time was reduced when a susceptible genotype was infected with TYLCV. Together, these results suggest that vector preference and development could be affected by the timing of infection and by host resistance. These effects could play a crucial role in TYLCV epidemics