Laboratory and field evaluation of several organochlorine and organophosphorus compounds for control of imported fire ants

Abstract

Eleven organochlorine and twelve organophosphorus pesticides and one antibiotic were selected from laboratory screening tests for field evaluation in baits for control of the red imported fire ant, Solenopsis invicta Buren.

Speed of Efficacy and Delayed Toxicity Characteristics of Fast-Acting Fire Ant (Hymenoptera: Formicidae) Baits

“…The LT 15 and LT 50 CLs did not overlap for hydramethylnon based on moribund/dead data obtained from the two separate delayed toxicity tests (Tables 4 and 5). Variation in delayed toxicity among separate tests has occurred with mirex and hydramethylnon baits (Banks et al 1977, Vander Meer et al 1982). The differences may be attributed to many unspeciÞed factors among different studies (e.g., temperature, ant size, and nutritional needs) that could contribute to experimental variation.…”

O,O-dialkyl O-[p-(N-alkylcarbamoyl)phenyl] phosphorothionates: a promising new series of toxicants for the control of imported fire ants

“…N-sec-Butyl-phydroxybenzamide (2d): mp 157-158 °C (chloroform); 70% yield; NMR (acetone-d6) 0.9 (t, 3 ), 1.2 (d, 3 ), 1.6 (m, 2 ), 4.1 (m, 1 H), 6.9 (d, 2 H), 7.8 (m, 3 H); mass spectrum m/e 193 (M+). N-n-Amyl-p-hydroxybenzamide (2e): mp 108-110 °C (ethanol); 84% yield; 1H NMR (acetone -d6) 0.93 (5 ), 1.4 (m, 4 ), 3.51 (m, 2 H), 6.8 (d, 2 H), 7.8 (m, 3 H s imported fire ant toxicant classification system (Banks et al , 1977).…”

“…Of the approximately 800 organophosphorous compounds that have been evaluated as possible imported fire ant toxicants, only 10 have exhibited delayed toxicity. All 10 are halogenated phosphorothionates (Banks et al, 1977). A comparison of the ester phosphorothionate derivatives (4) to the amide derivative (3) (Table III) indicates that the toxicities of the 0.1% solutions of the amides were only slightly more toxic than those of corresponding ester derivatives to the imported fire ant, but substitution of the amide group for a ester group greatly enhanced the delayed killing property of the phosphorothionates.…”

“…A comparison of the ester phosphorothionate derivatives (4) to the amide derivative (3) (Table III) indicates that the toxicities of the 0.1% solutions of the amides were only slightly more toxic than those of corresponding ester derivatives to the imported fire ant, but substitution of the amide group for a ester group greatly enhanced the delayed killing property of the phosphorothionates. Phosphorothionates 3b and 3e exhibited delayed toxicity over almost a 10-fold concentration range while 3h (R' = Et; R = -Bu) turned out to be one of the few known class iv (Banks et al, 1977) imported fire ant toxicants.…”

Degradation of the toxicant AC 217300 in Amdro imported fire ant bait under field conditions

“…uated as possible imported fire ant toxicants, only 10 have exhibited delayed toxicity. All 10 are halogenated phosphorothionates (Banks et al, 1977). A comparison of the ester phosphorothionate derivatives (4) to the amide derivative (3) (Table III) indicates that the toxicities of the 0.1% solutions of the amides were only slightly more toxic than those of corresponding ester derivatives to the imported fire ant, but substitution of the amide group for a ester group greatly enhanced the delayed killing property of the phosphorothionates.…”