تابعین کرام کا مقام و مرتبہ اور ان کی علمی و ادبی خدمات

After the Prophets of Allah Almighty, the most sacred class of mankind is the class of Prophet Muhammad's Companions. Those are the people who had seen the prophet of Islam with their naked eyes, remained in his companionship and got the heights of knowledge and actions and proved to be a great example of character by attaining the image of Prophet Muhammad's model of excellence. Another class which, like the companions of Prophet (pbuh), deserves such honor is the class of Tabe’en (The followers of the Companions).  Tabe'en had contributed a matchless role in the history of Islam regarding religious knowledge and literature. They had also examplary performed in social, economical, political and military services. Due to these great services they are considered the most sacred class of the Ummah after the prophet’companions. There is a list of academic and literary services ahead of the name of each person in this class. And these services are the great testimony to the greatness of these people. The prophet's companions received the religious knowledge directly from the Prophet (peace and blessings of Allah be upon him), while Tabe'en got it from the companions and then published it in the whole world. The sincere efforts performed by Tabe'en regarding Quran, Hadith, Tafseer and Islamic litrature are of so high level that no one had reached such level of sincerity in the entire history of Islam. The steps that occur after that period, regarding the development of Islamic culture are only the effects of their services. Actually ‘‘Tabe’en’’ is the only class that has spread the social, moral and spritual blessings of Islam throughout the world. That is why, it is not only the Quran that witnesses their greatness but the Prophet (peace be upon him) also praises them.

Seasonal Biodiversity of Braconidae Hymenoptera in Citrus Orchards of Sargodha, Pakistan

Citrus is one of the important fruit grown in Punjab, particularly in Sargodha region. Its export plays a vital role in Pakistan‟s economy. However it is adeversely affected by many biotic and abiotic factors. Among biotic factors, a large number of insect pests attack on citrus crop even before flowering to fruit formation which ultimately results in decreased fruit production and poor juice contents. A large number of insecticides are used to control citrus insect pests but their indiscriminate use causes environmental pollution, primary pest outbreak, secondary pest resurgence and development of resistance against insecticides. Therefore, to overcome the ill-effects of insecticides, there is a need to design a widespread integrated pest management strategy. In nature, different natural enemies play a vital role in the reduction of citrus insect pest‟s population. Natural enemies such as predators, parasitoids and pathogens are used for biological control of different insect pests. Several natural enemies attack on various prey or host species while few are host specific such as parasitoids. Most of the parasitoids belong to family Braconidae of order Hymenoptera which contains large number of parasitoid species that successfully control several important plant pests. This family comprises of 44-47 subfamilies and about 1000 genera with over 40,000 species that are widely distributed all over the world. Prevalence of more number of species in district Sargodha provided us basic information about the efficiency of parasitoids as biocontrol agent. In this study, braconids fauna from different localities of Sargodha region were explored, with particular reference to citrus orchards. For this purpose different kinnow orchards in selected localities were selected for the collection of parasitoids and their mummies. The parasitoids were identified under the microscope using taxonomic keys. Confusing species of parasitoids were further identified by their DNA sequences. Diversity index (Simpson) method was used to find the most prevalent species in each tehsil of district Sargodha.