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🏛️ USDA PRIORITY — ANIMAL AGRICULTURE & LIVESTOCK HEALTH

🐄 Animal Agriculture Scientific Calculators

Fly pressure management, heat stress modeling, feed conversion analysis, zebra stripe IPM effectiveness, and livestock productivity science — powered by USDA ARS animal agriculture research.

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🍇 NASS Livestock Prices
🦘 ARS Fly & THI Benchmarks
⚖ Fly Control Gap
🍇 USDA NASS — Livestock & Dairy Prices

Current USDA NASS livestock and dairy prices. Auto-populates cattle price and milk price used in THI production loss and fly pressure impact calculations (SF13-S.001, S.002).

Select livestock commodity to load USDA NASS current price benchmarks.

Source: USDA NASS Animals & Products. Monthly price estimates. Reference values.

🦘 USDA ARS — Fly Pressure & THI Research Benchmarks

USDA ARS Knipling-Bushland Livestock Insects Laboratory economic thresholds and production impact benchmarks. Auto-populates fly count thresholds (SF13-S.002), THI stress levels (SF13-S.001), and zebra stripe effectiveness (SF13-S.003).

Select fly type and species to load USDA ARS economic threshold and production impact benchmarks.

Source: USDA ARS Knipling-Bushland U.S. Livestock Insects Research Laboratory, Kerrville, TX.

⚖ Fly Control Gap Analysis

Compares the cost of inaction (full production loss) against the cost of intervention by strategy, highlighting the economic gap. Load NASS prices first for accurate dollar values.

Select a scenario and click Build Gap Analysis.

Tip: Use these gap values to pre-populate the Fly Control Strategy Comparison in SF13-E.001.

🌡️ Temperature Humidity Index (THI)

Model SF13-S.001

Calculate the Temperature Humidity Index to assess heat stress risk in livestock. Uses USDA ARS and NRC thresholds for cattle, swine, and poultry. Predicts production loss onset and severity.

🌡️ THI Heat Stress Assessment

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Research Source: USDA ARS Livestock Behavior Research Unit · NRC (2001) Nutrient Requirements of Dairy Cattle · Mader et al. (2006) Comprehensive THI model for feedlot cattle.

🪰 Fly Pressure Index

Model SF13-S.002

Quantify biting fly (horn fly, face fly, stable fly, horse fly) pressure on livestock using USDA ARS economic threshold models. Determines intervention trigger levels based on species, fly type, and production system.

Count flies on one side of animal × 2 for total. Horn fly threshold: 200/animal.

🪰 Fly Pressure Assessment

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Research Source: USDA ARS Knipling-Bushland U.S. Livestock Insects Research Laboratory · Bruce (1964) Economic threshold for horn fly · Campbell et al. (2001) Stable fly impact on beef cattle.

🦓 Zebra Stripe IPM Effectiveness

Model SF13-S.003

Model the fly reduction effectiveness and production benefit of zebra stripe painting on cattle. Based on Kojima et al. (2019) peer-reviewed research showing ~50% reduction in biting fly landings via visual motion disruption.

Paint typically needs reapplication every 3–6 weeks depending on rain and coat growth.

🦓 Zebra Stripe IPM Analysis

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Research Source: Kojima et al. (2019) "Cows painted with zebra-like striping can avoid biting flies" — PLOS ONE · USDA ARS Knipling-Bushland Livestock Insects Research Laboratory.

🌾 Feed Conversion Ratio (FCR)

Model SF13-S.004

Calculate feed conversion ratio and feed efficiency relative to USDA ARS benchmarks. Identifies production efficiency gaps and quantifies the impact of heat stress or fly pressure on FCR deterioration.

For dairy cattle, enter milk production (lbs/day) instead of weight gain.

🌾 FCR Analysis

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Research Source: USDA ARS Meat Animal Research Center (MARC), Clay Center, NE · NRC (2016) Nutrient Requirements of Beef Cattle · Scharf et al. fly-FCR interaction model.

🐃 Reproductive Efficiency Index

Model SF13-S.005

Calculate herd reproductive efficiency using conception rate, pregnancy rate, and calving interval metrics. Models the impact of heat stress on reproductive performance using USDA ARS and University extension research.

Target: 365 days (12-month calving interval). Industry avg: 380–400 days.

🐃 Reproductive Efficiency Assessment

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Research Source: USDA ARS Roman L. Hruska Meat Animal Research Center · Hansen (2009) heat stress effects on reproduction · BIF (2018) Guidelines for Uniform Beef Improvement Programs.
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