Do not apply within 10 days of harvest or pasturing. Do not apply directly to water runoff may be hazardous to aquatic organisms. Signal word on label: WARNING or DANGER, depending on formulation. This organophosphate insecticide is available from various suppliers and in various formulations. See label for directions.ĭimethoate* (Dimate and others, formerly Cygon) Extended residual activity due to helios technology. For control or suppression of many common insect pests. REI is 24 hr.Ĭhlorpyrifos plus zeta-cypermethrin (Stallion) Do not make a second application of Cobalt or another product containing chlorpyrifos within 10 days of first application. Do not cut or graze treated alfalfa within 7 days after application of 7 to 13 fl oz per acre of Cobalt, within 14 days after application of 13 to 26 fl oz per acre, or within 21 days after application of rates above 26 fl oz per acre. Do not flood irrigate for 24 hours following application. It is highly toxic to bees exposed to direct treatment on alfalfa. a.i./ acre, or within 21 days after application exceeding 0.5 lb a.i./acre.Ĭhlorpyrifos plus gamma-cyhalothrin* (Cobalt) a.i./acre, 14 days after applications of 0.5 lb. Do not cut or graze treated alfalfa within seven days after applications of 0.25 lb. Some phytotoxic symptoms may be observed on young, tender, rapidly growing alfalfa. Highly toxic to bees exposed to direct treatment. To avoid contamination of irrigation tail water, do not flood irrigate within 24 hours following an application of chlorpyrifos. For best coverage when using ground application, a minimum of 20 gallons of water per acre with hollow cone nozzles is recommended. For aerial applications use 2 to 5 gallons of water per acre. Do not apply more than once per cutting or four times per year. Do not apply within 7 days of harvest or grazing.Ĭhlorpyrifos* (numerous products including Chlorpyrifos, Eraser, Govern, Lorsban, Nufos, Pilot, Warhawk, Whirlwind and Yuma) Refer to specific product labels for information on chemigation. Most labels recommend the use of 25 to 40 gallons of water with ground equipment to ensure adequate coverage. Some phytotoxicity is possible and may cause bleaching of tender alfalfa foliage. Carbaryl is extremely hazardous to aquatic invertebrates, so do not apply directly over water. BEE CAUTION: Do not apply or allow to drift to blooming crops or weeds if bees are visiting the treatment area. Signal word on label: CAUTION or WARNING depending on formulation. Check the product label to make sure it is approved for the intended use. This carbamate insecticide is sold by several companies and in different formulations. a.i./acre) per cutting on mixed-stands of alfalfa and intentionally-grown grasses. a.i./acre) per cutting for alfalfa or 2.8 fl. Chemigation and ULV applications are allowed by label. Minimum application volume (water) 10 GPA ground and 2 GPA aerial application. Do not apply this product or allow it to drift to blooming crops or weeds on which bees are actively foraging. Extremely hazardous to fish and aquatic invertebrates. However, growers and applicators should read pertinent sections of the label before final selection or application. Special Instructions - These notes are intended to help producers make preliminary decisions on chemicals to be used on their crops. If there is an average of 3 adults and/or nymphs per sweep on 3-inch seed alfalfa or more than 5 adults and/or nymphs per sweep on seed alfalfa over 3 inches tall, a treatment may be advisable.These notes are intended to help producers make preliminary decisions on chemicals to be used on their crops. Fall seedings especially need protection from larval defoliation and possibly plant death.ĭepending on the value of the crop, defoliation levels as low as 10-15% may be economically justified.Īlfalfa grown for seed may need protection. Do NOT feed infested hay, even if treated, to horses.Ĭaterpillars: (alfalfa caterpllar, armyworms, cutworms, green cloverworm loopers, and webworms)ĭepending on the value of the crop, defoliation levels as low as 10-15% may be economic. Controls should be applied well before harvest, and hay conditioners should not be used. Livestock ingesting hay infested with dead blister beetles may become sick or die. Refer to Table 1 for management guidelines.Ģ) less than 10% of the aphids are parasitizedĤ) the average stem length is less than 14 inches.Ģ) less than 10% of teh aphids are parasitized, Read and follow ALL label rate, application, and use directions This publication is intended to aid pest managers in treating pest infestations in alfalfa during the growing. Field Crops ALFALFA INSECT CONTROL RECOMMENDATIONSĬhristian H.
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