Del. NEWARK, tomologists with the University of Delaware Agricultural Ex periment Station have just com pleted their annual fall European com borer survey. The results show a three-year trend toward higher ECB populations in the state, with more than a 100-percent increase this year over the 1980 average, reports chief surveyor Charles E. Mason. He found an average of 474 overwintering borers per 100 plants this fall, compared to only 231 a year ago. Like many other insects, com borer populations run in cycles. INTRODUCING THE SECOND GENERATION SCAVENGER FOR THE "EVERYDAY HAULER" * IMPROVED SPREAD PATTERN * MOVEABLE AUGER -ALLOWS UNLOADING EVEN THE TOUGHEST MANURE *HI-DENSITY POLYMER LINER-PREVENTS FREEZING IN WINTER * 1150 GALLONS *144 BU. STRUCK LEVEL *ONLY 63” HIGH * OPERATES ON ONLY 60 H.P. PENNSYLVANIA Bence's Farm Equipment Bedford. PA 814-623-8601 John E. Brown Forksville. PA 717-924-3492 Clugston Implement Chambersburg PA 717-263-4103 Dili's Farm Equipment Marion Center. PA 412-286-9606 Thomas Dunlap Jersey Shore, PA 717-398-1391 Corn borers on rise in Delaware Right now, says the insect ecologist, their numbers are on the upswing. The last high population occurred in 1978, when an average of 569 borers per 100 plants were found. By the following year, the population had dropped to only 154. The most com borers ever recorded during the 45-year history of the survey was 707, back in 1977. It’s too soon to predict what impact the present ECB population will have on next season’s crop, says Mason. A lot depends on how many larvae survive the winter on the amount of egg laying in the spring, and on the rate of En- Dunkte t Greib Center Hall, PA 814-364-9109 Mill Hall. PA 717-726-3115 Histand Farm t Home Service Rome. PA 717-744-2371 Evergreen Tractor Lebanon, PA 717-272-4641 H.R. Gutshall A Sons Carlisle PA 717-249-2313 Loysville PA 717-789-4343 BUILD FOR THE DAIRY INDUSTRY WE parasitism. In recent years, surveyors have found increased numbers of Lydella thompsoni a fly that parasitizes the borer. Paul P. Burbutis, a specialist in biological control at the Ex periment Station, has been studying the Lydella parasite, which he says he believes can be of help in reducing ECB populations in the state. The Kent county field which last year had the highest percent of parasitized larvae had the lowest number of borers per 100 plants this year a promising sign. The 1981 Delaware ECB survey was conducted September 22 Call Your Martin Dealer for Details A.L Herr t Bro. Quarryville, PA 717-786-3521 R.S. Hollinger I Sons Mountville, PA 717-285-4538 C.B. Hoober I Son Intercourse, PA 717-768-8231 II Wm. Kelly Bam Equipment Zimmerman Farm Service Edmboro, PA Bethel, PA 814-734-3614 717-933-4114 Meckley's Litoestone Herndon, PA 717-758-3915 Red Wing Farm Fleetwood, PA 215-944-0791 944-9583 W I J Dairy Sales Oxford PA 717-529-2569 Lancaster Farming, Saturday, November 21,1981—D7 through October 7. Ten fields in each county were sampled. Twenty-five plants from each field were examined. From these, the percentage of plants infested and the number of live borer larvae per 100 plants were determined. New Castle county had roughly half as many borers per 100 plants NEED MORE ROOM? Read The Classified Real Estate Ads 841KutztownRd. Myerstown, PA 17067 Ivan Zook Belleville PA 717-935-2948 MARYLAND E.T. Cline I Son Hagerstown, MD 301-739-2223 H.B Duvall Frederick, MD 301-662-1125 as did the remaining two counties, reports Mason. Three of the four fields having the highest number of borers per 100 plants are located within 11 miles of each other in any area west of Milford. Number of borers per 100 plants ranged from lows of 34 and 48, to highs of 1050, 1200 and 2200. 717-933-4151 Enfield Equipment, Inc. Whiteford, MD 301-452-5252 Hughes Bros. Westmenster, MD 301-848-6313 DELAWARE Delridge Supply Greenwood, DE 302-349-4327 NEW JERSEY Jones Dairy Service Medford. NJ 609-267-0198 '' x
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