1971 SEED CORN CHOKE VITAL FOR BLIGHT RESISTANT CORN North Carolina com growers must add * new wort to their vocabulary and bobe up on their NBTs to order to make the beet seed selection for 1971. The new word to cytoplasm. It’s not really new, but in the past it’s been fairly weR con fined to use by plant breeders and agricultural. sdenttos and of very little interest, to fanners. But in 1971, because of the com blight and the dose rela tionship of the disease to Texas male sterile cytoplam, the word will be critically import ant to,the entire com indus try, including farmers. Corn grown fom seed pro duced by /the use of the Texas male sterile, or T cytoplasm, was shown to be highly susceptible to blight last season. The N in the corn alphabet stands of normal cytoplasm. The B stands for blend, meaning mixed seeds, some containing T cytoplasm nd some containing N cytoplasm. • North Carolina State Universi ty com specialists A. D. Stuart and S. J. Hodges are urging farm ers to select seed far 1971 on the basis of Content of N cy toplasm. This com showed tol erance to blight in 1970 and of fers the best chance of avoiding the disease in 1971. The N. C. Department of Ag riculture recently adopted a reg ulation that will require 1971 com seed to be labeled to show the percentage of N and T cy toplasm. Hodges and Stuart comment ed that, as a general rule of thumb, growers could assume thait the higher the N percent age, the higher degree of blight tolerance the seed will have based on 1970 observance. The 100 percent normal cytoplasm seed would 'be safest. Unfortu nately, the supply of these seed is limited. This will mean farmers are likely to be s electing from Mhcthek you have the hot vj'broiv of F£V£/Z,iveTMiomi6 PAW OFA srumuG headache OR THE SWELLING JOINTS OF • RHeoMAToicM«7Wie/7W,VoucAii BE ASSOREP that ASPIRIN IS MOST FREQUENTLY THE PHYSICIANS SAFE CHOICE TO MARE YOU FEEL . , 0VER1 PAY rut. **PHARMACISTS than 170,000: hrs VERIFY THE CHECRTME I SOME DOCK WitiSl NEW PEOPUC (Uowi PASTEUR (l822-9S) WAS •'THE FIRST TO PUf'-fO EYPERIMEWW. proof the theory -wax Bacteria ARE THE CAUSES OF SOME DISEASES IN MAN AMP ANIMALS. VIOLENTLY OPPOSED AT THE TIMS H IS PISCOVERIES UMPERUE THE WHOLE CONCEPT OF THE PREVENTION ANP CURE OF MANY COMMUNICABLE PISEASES «//' blends of IS ana i corn ana , in some cases, second generation of F-2 corn eebd from a hybrid. The F-2 seed cannot be offer ed for sate in North Carolina as a named hybrid. They can be labeled, “Com — variety not stated” and these words writ ten in brackets or" parenthesis: “(F-2 from variety).” The per Cent N and T must be shown. Stuart and Hodges explained that growers will be losing the extra vigor of a hybrid by plant ing second generation seed. How ever, where these seed have been selected from normal cytoplasm plants that produced well under blight conditions in 1970, they may offer more potential than a T variety or a blend high in T cytoplasm content. 'i Agronomists figure that rough ly 20 per cent of the yield po tential is lost when second gen eration seed are planted from ,a double cross hybrid. If the seed were saved from a angle cross hybrid, the potential loss would be 30 per cent or more. These estimated losses do not include any loss that might re suit from blight or other caus es. Rides of further reduction in potential yield are cited in cat es where farmers use F-2 seed from a crop planted last year to a hybrid blend, ' In (the 1970 Wend was 50 per cent normal and 50 per cent Texas cytoplasm, .four example, the F-2 seed would he of the same percentage. This means half of the planfts in the 1971 F-2 planting would have Tcyltop plasm and therefore be attiep tible to blight This potential loss would be in addition to that expected from having used F-2 seed to begin with. The total yield reduction potential in this case could be 70 per cent or mare. ■' * -• The NCSU agronomists believe that farmers usjng F-2 seed should pay careful attention to whether the seed! wefe saved from a 100 per cent normal cytoplasm hybrid or a blend. They are also urging,farmers to contact their regular seed suppliers early and order the best seed available. “Best” in this case is regarded as those seed highest in N cytoplasm. Hodges and Stuart suggested