Introduction
Wheat (Triticum aestivum L) is the most widely grown cereal crop in the world, covering about 237 million hectares annually, accounting for a total of 420 million tones [1],and for at least one-fifth of man’s calorie intake [2]. In Pakistan the wheat is an important grain crop which is being grown. It is cultivated during winter cropping season after cultivation of summer crops rice and maize. Pakistan Agriculture Research Council [3]. Published a report that country consumes 120 kg of wheat per capita per year. Wheat is cultivated by All Provinces of Pakistan, therefore Pakistan in listed in top 10 wheat producing states of the globe, but of increasing population of the country still there is problem to complete the grain prerequisite. Yield and quality of grains of the wheat crop has also many pests which damage it and are responsible for great decrease in yields. Damage to crop is caused by the several species of insects, including various kinds of diseases the weather conditions may also be responsible for yield losses in wheat. Feeding inside the stem or on the leaves of the plant various species of insects have been discovered. Biodiversity is the changes in life, but also presence of same kind of organisms in agroecosystems, generally called as biodiversity[4]. Leafhoppers have a very important place among the insect biogenesis that damage to winter wheat agroecosystems. Worldwide Leafhoppers include about 20000 phytophagous distributed species. Most leafhoppers (Javesella pellucida, Psammotettix alienus, Macrosteles laevis) found on cereals and the first one is a vector for viruses [5]. For the control of insect pests of wheat naturally occurring carnivorous insects are responsible[6]. Dangerously damaging pests of wheat crop are Aphids [7]. To know the yields losses caused by Rhopalosiphum padi Studies have been done (L.), Metopolophium dirhodum (Wlk.) and Sitobion avenae (Fab.) [8].By thirps to wheat crops Significant damages have been caused, the development of wheat nearly overlaps thirps life cycle [8]. A strong background can be given by accurate identification of insect species can give and to know the phylogenetic patterns, diversity and the process of evolution and extermination among and between various species. Proper identification of species permits for comparison or expansion of more ancient research works. Due to large number of insect pest invading wheat crop and causing losses in production, it was felt necessary to observe the current insect pest status on wheat crop in district Haripur, growers to diagnose insect pests and find its solution to increase their crop yields the available knowledge will be helpful for the wheat cultivators.