Economic Effects of Horn Fly (Diptera: Muscidae) Populations on Beef Cattle Exposed to Three Pesticide Treatment Regimes

Hogsette, Jerome A.; Prichard, D. L.; Ruff, Joseph P.

doi:10.1093/jee/84.4.1270

Cited by 34 publications

(22 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The signiÞcant reduction in horn ßy numbers at SEREC to a mean of Ϸ150 ßies per cow resulted in a signiÞcant increase in calf weaning weight. The tactics used at SWREC (excluding Brahman crossbreeding) reduced horn ßy numbers to levels (Ն200 ßies per cow) that were similar to levels that were achieved in previously published studies (Brethour et al 1987, Schreiber et al 1987, Hogsette et al 1991 where no economic weaning weight advantage was associated with horn ßy management.…”

Section: Table 2 Results Of F Tests Of the Main Effects And Interactsupporting

confidence: 68%

Evaluation of Alternative Tactics for Management of Insecticide-Resistant Horn Flies (Diptera: Muscidae)

Steelman

McNew

Simpson

et al. 2003

View full text Add to dashboard Cite

A 3-yr study was conducted to determine the efficacy of tactics that could be used to manage populations of insecticide-resistant horn flies, Hematobia irritans irritans (L.). Insecticide spray, spot-on or pour-on formulations and two IGRs in bolus formulation, 1.3- and 3.2-ha pasture rotations on different rotation schedules, 0-50% Brahman breeding, selected fly-resistant cows, and a mechanical trap were evaluated singly and in combination. Concentration-mortality tests indicated that horn flies collected from cows used in the current study were significantly less susceptible to diazinon, coumaphos, and methoxychlor than horn flies from cows at the same locations previously used to determine baseline susceptibility. During the 3-yr study at the Southeast Research and Extension Center (SEREC), the IGR-bolus significantly reduced (P < 0.05) horn fly numbers on both the continuous and rotational graze regimens, resulting in significantly (P < 0.05) greater calf weaning weights (average of 24 kg). Horn fly numbers were significantly greater on untreated cows during the 3-yr study at the Southwest Research and Extension Center (SWREC) compared with the mean fly numbers on cows that received fly-management treatments. All tactics and tactic-combinations used at SWREC on cattle having no Brahman breeding failed to significantly reduce insecticide-resistant horn fly numbers. However, the combination of Brahman breeding with the IGR-Bolus and mechanical trap significantly reduced horn fly numbers and resulted in significant increases in calf weaning weight. In addition, mean horn fly numbers decreased significantly as the percentage Brahman breeding increased with 50% Brahman breeding reducing horn fly numbers by 140 flies per cow. No significant difference was found between the mean fly numbers on the fly-resistant purebred group and the cows that had no Brahman breeding but received the IGR-Bolus or used the mechanical trap. The use of synergized zeta-cypermethrin pour-on treatment successfully complimented the use of IGR-bolus and mechanical traps in reducing insecticide-resistant horn fly numbers. Neither 1.3- nor 3.2-ha size paddocks and stocking rates used in the rotation graze regimens at SEREC and SWREC, respectively, significantly reduced horn fly numbers when compared with continuously grazed paddocks. Data indicated the importance of using tactics that reduce horn fly numbers to approximately 150 horn flies per cow. These data demonstrated the efficacy of using tactic combinations to manage insecticide-resistant horn fly populations.

show abstract

Section: Table 2 Results Of F Tests Of the Main Effects And Interactsupporting

confidence: 68%

Evaluation of Alternative Tactics for Management of Insecticide-Resistant Horn Flies (Diptera: Muscidae)

Steelman

McNew

Simpson

et al. 2003

View full text Add to dashboard Cite

show abstract

“…As diferenças de ganhos de peso médio foram de 7, 1, 2 e 3 kg para as vacas e de 3, 2, 1 e 2 kg para os bezerros à desmama, no primeiro, segundo, terceiro e quarto ano, respectivamente. Estes resultados indicam que o nível de infestação da mosca produziu pouco efeito no ganho de peso de vacas e bezerros Nelore antes da desmama e são similares aos obtidos por outros estudos (Schreiber et al 1987, Hogsette et al 1991, Morrison & Foil 1995. Os resultados diferem dos estudos realizados por Kunz et al (1984), Quisenberry & Strohbehn (1984), Haufe (1986), Steelman et al (1991) e Suarez et al 1995, que encontraram diferenças significativas no ganho de peso de vacas e bezerros tratados contra a mosca-dos-chifres.…”

Section: Resul Resul Resul Resul Results T T T Tados E Discus Ados E Dunclassified

Mosca-dos-chifres, Haematobia irritans: comportamento e danos em vacas e bezerros Nelore antes da desmama

Bianchin

Alves

2002

Pesq. Vet. Bras.

View full text Add to dashboard Cite

The hornfly and losses caused by it in Nellore cows and pre-weaning calves where studied, using two groups of 60 animals each, one group with a natural infestation and the other without hornfly, during four consecutive years. It was seen that the number of flies on the cows did not exceed an average of 80 flies/animal in all years of observation. The majority of the cows (83%) had few flies, whereas 17% had larger numbers. The calves were infested with few flies. Rainfall in excess of 100 mm during short periods diminished fly infestation. Weight gain in the cows without flies (treated with insecticides) as well as their calves was greater than in the control cows, but not statistically significant (P>0.05). Mean percentage pregnancy during the four years was 15% more in treated cows than the non-treated animals, and this difference was probably due to the infestation of the bulls.

show abstract

“…However, certain insecticides are restricted from use on lactating dairy cattle. Furthermore, Hogsette et al (1991) found alternative insecticide treatments (organophosphate class) were not able to reduce ßy densities to Ͻ50 ßies per head, nor did the use of insecticides affect weight gains. They surmised that the elimination of the horn ßy was not possible in Florida and perhaps management around a 200 ßy threshold was an attainable objective with added beneÞts to resistance management and reduced pesticide use (Hogsette et al 1991).…”

mentioning

confidence: 97%

“…Horn ßy densities of several hundred ßies per animal are common among uncontrolled populations. Proposed economic thresholds for horn ßies on cattle vary from 50 (Butler and Okine 1999) to 230 per animal (Haufe 1979); however, 200 ßies per animal is the generally accepted standard (Schreiber et al 1987, Hogsette et al 1991.…”

mentioning

confidence: 99%

“…Pyrethroid ear tags were highly effective against the horn ßy and densities below 50 ßies per head were relatively easy to maintain until the development of resistance (Miller et al 1983, Quisenberry et al 1984, Sheppard 1984, Hogsette et al 1991, Sheppard and Joyce 1992. Resistance is now widespread throughout most of North America and control has become increasingly difÞcult.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Managing the Horn Fly (Diptera: Muscidae) Using an Electric Walk-Through Fly Trap

Watson

Stringham

Denning

et al. 2002

View full text Add to dashboard Cite

An electric walk-through fly trap was evaluated for the management of the horn fly, Hematobia irritans (L.), on dairy cattle in North Carolina over 2 yr. The trap relies on black lights and electrocution grids to attract and kill flies that are brushed from the cattle passing through. During the first season, horn fly densities were reduced from >1,400 to <200 flies per animal. Horn fly density averaged 269.2 +/- 25.8 on cattle using the walk-through fly trap twice daily, and 400.2 +/- 43.5 on the control group during the first year. The second year, seasonal mean horn fly density was 177.3 +/- 10.8 on cattle using the walk-through fly trap compared with 321.1 +/- 15.8 on the control group. No insecticides were used to control horn flies during this 2-yr study.

show abstract

Economic Effects of Horn Fly (Diptera: Muscidae) Populations on Beef Cattle Exposed to Three Pesticide Treatment Regimes

Cited by 34 publications

References 12 publications

Evaluation of Alternative Tactics for Management of Insecticide-Resistant Horn Flies (Diptera: Muscidae)

Evaluation of Alternative Tactics for Management of Insecticide-Resistant Horn Flies (Diptera: Muscidae)

Mosca-dos-chifres, Haematobia irritans: comportamento e danos em vacas e bezerros Nelore antes da desmama

Managing the Horn Fly (Diptera: Muscidae) Using an Electric Walk-Through Fly Trap

Contact Info

Product

Resources

About