Show ALFALFA ALFALlA WEEVIL CONTROL In Inn some Borne areas the adult alfalfa weevil weavil has become highly resistant resistant resist resist- ant to heptachlor and as used in ill the early spring spray n U g That's the report from Utah Utah State State University harmers Farmers Farmers who face tace that problem problem lem should try treating some of ot their acreage acreage with one pound of actual heptachlor per acre in granular form torm as soon as the last fall tall cutting of ot hay has been removed removed re re- moved suggests extension entomologist ento ento- entomologist Dr George F. F Knowlton Research by Drs Donald W. W Davis and B B. B A A. A Haws of the Agricultural Experiment Station Indicates a promise of help where the weevil resistance problem has become serious They found that October treatment using granular form heptachlor at this increased dosage give te quite effective effective ef ef- results where the usual spring controls have failed for tor forone forone torone one or more seasons The entomologists say fortunately fortun fortun- fortunately most alfalfa growers in Utah still get effective control by using the cheaper spring control which uses uses 4 4 ounces of ot actual heptachlor or or- per acre sprayed sprayed on the We earliest growth hay before It reaches a height ot or 2 Inches It is only In Inc areas where alfalfa has received the spring spray treatment evary every year for tor about 12 years or more mute that the weevil has bas developed enough resistance to these chemicals to be serious researchers are working on better tetter control methods Until they are developed this granular fall tall treatment and or stubble sprays of parathion or after alter the first crop is cut and removed removed re ro moved in spring will help growers grow grow- growers ers meet the the- resistance problem Dr Knowlton explained I |