A2o—Lancaster Farming, Saturday, April 25,1981 GEORGETOWN, Del. - As vegetable producers get ready for the growing season, one of their first concerns is weed control. When you’re ready to treat, it’s important to use only those her bicides labeled for the particular crop you’re growing, cautions Umversity of Delaware extension vegetable specialist Mike Orzolek. When you use a chemical not labeled for a crop, not only do you violate EPA regulations, you also run the risk of crop injury, he says It’s just as important to apply materials at the labeled rate. If you go above this, you may get carry-over that affects the following crop in that field. Remember that herbicides control only specific weeds, so check labels carefully and relate what you use to the weed problems in each field For instance, Junsonweed may need controlling m one field, but not in others. It helps to have a good idea of the weed species in each field ahead of time. Orzolek suggests scouting the land the previous fall and noting what your problems are In one field the problem may be chick weed or henbit; in another, crabgrass or witchgrass. Map out the heavy infestations If you can’t find a suitable her bicide for a particular vegetable crop such as spinach you can always switch to a different one- PAUL B. SDuQOODSFOiiQiIOQI PAUL B. ZIMMERMAN, INC. Box 128 R D #4. Litltz. PA 17543 Wood Corner Rd 1 Mile West of Ephrata Phone 717-738-1121 Hardware* Farm Supplies Custom Manufacturing Crane Service Weed control perhaps sweet corn, or field corn if you’re into that kind of rotation. There are several tank mixes with atrazme which will give you good control of most annual grasses as well as the more common broadleaf weeds: Some of the more persistent broadleafs such as horsenettle which have a rhizome root system may require cultivation m addition to an her bicide for effective control. In some cases you may need to let such stubborn weeds grow through the season, depending on the vegetable crop. Tolerate them unti 1 after harvest Then go in and spot spray with Roundup. Wait two weeks to give this time to take effect before coming m with your disk or plow. Growers were hoping to have a promising new material - Sonalan - available for use on cucurbit crops in Delaware this summer, but clearance didn’t come through in time for the manufacturer to produce, package and distribute the chemical for 1981 It should be available for the 1982 growing season, however, and looks good for week control on cucurbits like watermelons, cantalopes and cucumbers, as well as beans and peas, Orzolek says In the meantime, there are several standard herbicides you can use on cucurbits this year Just be sure to check the label to be sure CUSTOM BUILT BARN EQUIPMENT ★ LOOP STALLS (Southern Style Channel Front - Welded Front) ★ STANDARD FREE STALLS ★ GATES (38" - 48” - 54" High) ★ AUTOMATIC GATE LATCHES ★ FENCING ★ FEED THRU FENCING tips for vegetable growers the material you use is safe fdr the crop you’re growing. The specialist suggests you go by recommendations in the current Delaware Commercial Vegetable guide. Copies of this extension publication are available at county extension offices in Newark (302- 738-2506), Dover (302-736-4675), and Georgetown (302-856-5250). If you’re using a pre-plant m corported herbicide, take care not to incorporate it any deeper than recommended. Some materials shouldn’t be worked in any deeper than two inches. If you disk them in to four or five inches, you’ll either dilute them or place the herbicide below weed seeds where it can’t be effective as a seed inhibitor. In either case, you won’t get the control you’re after. Pre-emergence herbicides generally rquire water to be ef fective. So if you think it’s going to be a dry season, be sure you provide for irrigation if you plan to use one of these materials. Make Hay With Avco-New Idea... 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Daily, j Located Vz Mile South of Fredericksburg ] Saturdays til Noon i Off Rt. 343 in Shirksville 4 Evenings byAppt. _ | Otherwise, be prepared for poor weed control, or none at all. Though moisture is less critical for them, even pre-plant incorporated materials work better if there’s ram within two weeks after ap plication. Some new post-emergence chemicals have been cleared for use on vegetables this year. Just remember that these products are specific for either grass or broadleaf weeds - not both. Some weed killers must be ap plied at the proper growth stage of the weeds to be effective-another good reason to read labels before treating. For example, to control ragweed, Basagran must be ap plied when weed plants are two to three inches tall. So take care not to let weeds get beyond the con trollable size. Successful weed control also depends on proper application. Check your spray equipment over well before using it. 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There’s no reason to be afraid to use such materials,- but you must be aware that after your crop is finished you won’t be able to plant certain cover crops such as barley, wheat or rye unless you go in fust and mold board plow. Disking won’t turn the soil enough to dilute the chemical. Check the label and find out what crops may be affected. Either avoid them or moldboard plow. We get our best ideas from you built to last! This low cost speedy windrow builder is efficient and effective in any type of field Rakes up to 11 feet m one pass by simply adding
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