MATTHEW PERRONE AP Business Writer WASHINGTON (AP) - Monsanto reported Wednesday that its income increased 22 percent in the agriculture products company's second quarter on strong sales of biotech seeds, particularly in Brazil and other emerging markets. The company boosted its full-year earnings guidance, citing its strong performance in the first half of the year. Its shares edged higher in afternoon trading. The St. Louis company said it earned $1.48 billion, or $2.74 per share in the three months ended Feb. 13, up from $1.21 billion, or $2.24 per share, in the same quarter a year ago. Monsanto Co.'s sales increased 15 percent to $5.47 billion, led by genetically modified corn seeds, the company's best-selling product. The results topped Wall Street predictions of $2.56 per share on sales of $5.27 billion, according to FactSet. Monsanto executives raised their full-year earnings outlook to between $4.40 and $4.50 per share, up from $4.30 to $4.40. Analysts expected earnings of $4.56 per share. "So our bottom line business outlook today means the momentum that we anticipated in our first quarter has clearly carried through into even stronger business results for the second quarter," said CEO Hugh Grant, on a call with analysts. Monsanto has dominated the bioengineered-seed business for more than a decade. In recent years the company has focused on growing business in emerging markets like Argentina, Brazil and other Latin American countries. The company's corn, soybean, cotton and other seeds have genetically engineered traits that repel bugs, increase yield and make them resistant to weed-killer. The company says these benefit farmers enough that they come out ahead, even though the seeds cost more than conventional seeds. Monsanto's critics argue that the company has tried to use patent law to control the supply of seeds for soybeans, corn, cotton, canola and other agricultural staples. Monsanto has a policy that prohibits farmers from saving or reusing the seeds once a crop is grown Last month the Supreme Court heard a case between Monsanto and an Indiana farmer who replanted the company's herbicide-resistant soybeans after buying them second hand. The court appeared likely to side with Monsanto Co. in its claim that the farmer violated the company's patents on the soybean technology. Sales of the company's seeds business increased more than 10 percent to $4.3 billion in the second quarter. Sales of the company's agricultural productivity unit, which sells pesticides and herbicides, increased 36 percent to $1.1 billion. Monsanto historically made most of its money from chemicals, including the herbicide Roundup. But Roundup isn't as profitable as it used to be, in part because competition from generic products from China and other nations has dragged down the price Monsanto can charge. Monsanto shares rose 89 cents to close at $104.51 Wednesday after rising as high as $106.44 earlier. That is a shade below the high end of their 52-week range of $69.70 to $106.61.