Strawberry and Raspberry Pest Management in Wisconsin

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Table 2. Examples of pesticides with restricted entry and preharvest intervals (continued) Pesticide Preharvest interval (PHI) a and limitations Common name Trade name Restricted entry interval Strawberries Raspberries simazine Princep 4L 12 hours NR — spinetoram Radiant, Delegate 4 hours 1 day 1 day spinosad Entrust, SpinTor 4 hours 1 day 1 day sulfur various 24 hours 0 0 tebufenozide Confirm 4 hours NR 14 days thiophanate-methyl Topsin-M 12 hours 1 day NR triflumizole Procure 12 hours 1 day NR Abbreviations: NR = not registered for use on this crop; PH = post harvest use only. a Days between final spray and harvest b Exempt from tolerance—Fixed copper materials are exempt from the requirement of a tolerance when applied to growing crops in accordance with good agricultural practice. Under USDA labeling information, all fixed (basic) copper fungicides labeled for use on strawberries or raspberries may be used on a “no time limitation” basis. But we suggest these copper materials not be used after the berries start to ripen. c Restricted entry interval varies with manufacturer; check the label. d Orbit is registered on both raspberry and strawberry; Propimax is registered only on raspberry and other cane- and bushberries. 6 PESTICIDE TOXICITY There are four common ways in which pesticides enter the human body—through the skin (dermal), the mouth (oral), the lungs (inhalation), and the eyes. Absorption through the skin is the most common route of poisoning of agricultural workers. Perhaps the greatest hazard for the applicator is in loading and mixing the pesticide concentrate, which presents a significant risk of exposure to the chemical in its most toxic form. Although hazards associated with the actual application are frequently much less severe, they can still be substantial, especially if there is significant drift or if appropriate precautions are ignored. A pesticide may be toxic as a result of exposure to a single dose (acute toxicity) or as a result of repeated exposures over time (chronic toxicity). Acute toxicities are normally expressed as the amount of pesticide required to kill 50% of a population of test animals (usually rats or rabbits). For oral and dermal exposure, this is referred to as the LD 50 or “lethal dose to 50%” in milligrams of toxicant per kilogram of body weight (mg/kg). For inhalation exposure, it is expressed as the LC 50 or “lethal concentration to 50%” in parts per million (ppm) of toxicant in the total volume of air when the toxicant is a gas or vapor, and in milligrams per liter (mg/l) of air or water when the toxicant is a dust or mist. Pesticides with greater acute toxicities have lower LD 50 and/or LC 50 values; that is, it takes less of the chemical to kill 50% of the test population. Labels indicate the relative level of acute toxicity through the use of signal words and symbols that reflect general categories of toxicity (see table 3). The toxicity category is assigned on the basis of the highest measured toxicity, be it oral, dermal, or inhalation; effects on the eyes and external injury to the skin are also considered.
Table 3. Toxicity categories of pesticides Toxicity category I II III IV High Moderate Slight Low Measure of toxicity toxicity toxicity toxicity toxicity Oral LD50 (mg/kg) 0–50 50–500 500–5,000 >5,000 Dermal LD 50 (mg/kg) 0–200 200–2,000 2,000–20,000 >20,000 Inhalation LC 50 gas/vapor (ppm) dust/mist (mg/l) 0–200 0–0.2 200–2,000 0.2–2 Eye effects corrosive irritation for 7 days 2,000–20,000 2–20 irritation for 20,000 >20 none mild irritation Signal word DANGER a WARNING CAUTION CAUTION mg/kg = milligrams per kilogram < = less than ppm = parts per million > = greater than mg/l = milligrams per liter a Products assigned to Category I due to oral, inhalation, or dermal toxicity (as distinct from eye and skin local effects) also must have the word “poison” and the “skull and crossbones” symbol on the label. HUMAN POISONING Pesticide poisoning. The effects of organophosphate and carbamate poisoning are rapid. Poisoning must be recognized early for effective treatment. Early symptoms are usually a headache, feeling of weakness, blurred vision, excessive perspiration, and nausea. Abdominal cramps, vomiting, and excessive salivation may set in with, or without, diarrhea. The throat and chest will feel constricted and breathing will be difficult. In mild cases of poisoning, some of these symptoms may be absent. In case of human poisoning. Call a doctor at once if you suspect organophosphate or carbamate poisoning. If symptoms develop and the patient is conscious, give two atropine tablets (1/100 grains each) immediately. Move the individual from the area of exposure. Remove contaminated clothing and wash skin with plenty of soap and water to remove all traces of the chemical. If chemical is swallowed, induce vomiting by giving warm soapy water. Avoid all further exposure to phosphate or carbamate insecticides. Victims are very susceptible to even small exposures until blood and tissue cholinesterase regenerate. Atropine is not an antidote for all pesticides. If there is any doubt, read the pesticide label before acting. Each pesticide has treatment information on the label. Begin this treatment as soon as possible. Take the victim to professional medical help immediately. Take along a copy of the pesticide label, or at least the chemical and common names of the active ingredient(s) and the name and address of the manufacturer. A medical emergency phone number often is listed on the pesticide label. The product’s Material Safety Data Sheet (MSDS) is a more technical document than the label, and it often contains additional treatment instructions for the attending medical professional. Poison Control Center (1-800-222-1222). You may call the Poison Control Center at any hour for information regarding proper treatment of pesticide poisoning. While other hospitals and medical facilities may have some information, the Poison Control Center has the most complete and current files and their personnel are specifically trained to deal with poison cases. 7
Page 1 and 2: A1934 Strawberry & Raspberry Pest M
Page 3 and 4: INTEGRATED PEST MANAGEMENT FEDERAL
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Strawberry and Raspberry Pest Management in Wisconsin

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