15- 



the spray materials, which included a variety of insecticides, 

 miticides, fungicides, herbicides, and growth regulators. There 

 were five replicates (18 mites per replicate) for each rate of each 

 material. Control slides were dipped into water. Mortality of A. 

 fallacis was determined at 48 hours after treatment. 



Results with materials tested at recommended field rates are 

 presented in Table 1. Materials with a toxicity of 70-100% are 

 considered highly toxic, 30-70% moderately toxic, and O-SOI of low 

 toxicity. Materials of high toxicity were: Zolone (both EC and 

 KP), Systox, Sevin, Diazinon, Carzol, Paraquat, and Roundup. 

 Materials of moderate toxicity were: Phosphamidon (4 oz. rate, 

 and 1 oz. rate), Kelthane, Plictran, and Alar. 



TABLE 1. TOXICITY OF ORCHARD SPRAY MATERIALS AT RECOMMENDED 

 FIELD RATES TO Amblyseius fallacis (BISHOP STRAIN). 



MATERIAL 



RATE/ 

 100 GALS 



MORTALITY 

 ("O 



TOXICITY 

 RATING 



INSECTICIDES 



Zolone (phosalone) 3EC 

 Zolone (phosalone) 25WP 

 Systox (demeton) 6EC 

 Sevin (carbaryl) 5 0WP 

 Diazinon 50WP 



Phosphamidon (dimecron) 8EC 

 Phosphamidon (dimecron) SEC 

 Thiodan (endosulfan) 50WP 

 Malathion 2 5WP 

 Imidan (Phosmet) 50 WP 

 Guthion (azinphosmethy 1) 



50WP 

 Methoxychlor 50WP 



MITICIDES 



Carzol (formetenate 



