论文部分内容阅读
高粱是热带半干旱地区各国最重量的粮食和饲料作物之一,多集中种植在相对贫困的亚洲、非洲和拉美地区。产量低而不稳,造成低产的原因很多,其中虫害就是重要原因之一。据作者在印度国际半干旱作物所工作期间所见及印度国家应用经济委员会报道,虫害带来的损失仅1976年就达高粱总产的12％,损失1281600吨粮食,50与60年代期间,尼日利亚因高粱摇蚊的危害造成4％的减产。加纳摇蚊大发生损失10—15％,垣桑尼亚部分区域40—100％的高粱植株被钻心虫蛀孔,大片枯心甚至成批倒伏,大面积欠收,乌干达部分年份钻心虫使56％的植
Sorghum is one of the most important food and feed crops in the countries of the tropical and semi-arid regions and is mostly concentrated in the relatively poor parts of Asia, Africa and Latin America. Low yield and instability, resulting in low yield for many reasons, including pests is one of the important reasons. According to the author’s observations during the Indian International Semi-Arid Crops Institute and the Indian National Applied Economic Council, the damage caused by pests was only 12% of the total sorghum output in 1976, with a loss of 1,281,600 tons of grain. In the 1950s and 1960s, Nigeria Due to the harm of sorghum chironomics caused 4% of the cut. In Ghana there is a 10-15% loss of large mosquitoes, some 40-100% of the sorghum plants in some areas of the country are bitten by worms, % Of the plant