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彭阳县属黄土高原丘陵区,地形复杂,气侯变化大,灾害频繁,粮食以冬小麦及杂粮为主,其中莜麦播种面积9万余亩,占粮食播种面积的9.4～11.5%,北部王洼等乡尤为集中,莜麦占粮食作物5%以上,莜麦的产量对全县人民生活水平的提高具有举足轻重的作用,莜麦黑穗病又是影响莜麦产量的主要病害,五、六十年代曾因此病造成2～3成的损失,后经用赛力散、六氯苯连年防治,发病率减至3%左右,八十年代初由于药源不足导致发病率回升,1984年发病率达9.75～52.1%,破产严重,莜麦面积减少,成为粮食生产中一大难题.
Pengyang County is a hilly area on the Loess Plateau, with complex terrain, large climate changes and frequent disasters. Grain is dominated by winter wheat and miscellaneous grains, of which more than 90,000 mu are planted, accounting for 9.4-11.5% of the sown area. Northern King Wa and other towns are particularly concentrated, 莜 wheat accounted for more than 5% of food crops, 莜 wheat yield on the improvement of living standards throughout the county plays a decisive role, 莜 wheat smut is the main disease affecting the yield of 莜 wheat, 10 to 10% of the disease caused by 2 to 3 percent of the loss, after the use of Sai Li San, hexachlorobenzene prevention and control in successive years, the incidence dropped to about 3%, the early eighties early due to insufficient lead to the rise in the incidence of the disease, the incidence in 1984 The rate of 9.75 ~ 52.1%, serious bankruptcy, barley area reduced, becoming a major problem in food production.