In Pakistan Citrus has an important value as fruit plant. The present day citrus is delectable, juicy, and seedless is of great nutritional significance as well. Citrus is a member of Rutaceae family and grown in varying densities in countries with tropical or subtropical climates. Its delicious edible varieties are Kinnow, Pine apple, Valencia late, Grape fruit, Blood red, Chinese lime, Mayer lime, Sweet lime, Fuetrell's early, Jaffa, Succari, Tangrin, Mungal Singh, and Musambi etc. It is used as best source of Vitamin C, sugars, amino acids and other nutrients. It has been reported that citrus prevent liver, lung and skin cancer, heart diseases, birth defects and also contributes to a balance and healthy life style. Citrus has been regarded as Queen of all fruits world wide citrus stands first in area and production.Pakistan has versatile climatic conditions and nearly all types of fruits might be produced successfully. A large area of Pakistan has sub tropical and tropical climate. Citrus being a fruit of these climates, receives more attention as compared to other fruits.

The present study clearly emphasizes that resistant or slow rusting varieties should be cultivated under farmers field conditions, to avoid the yield losses of stripe and leaf rusts in wheat varieties/lines.All the environmental conditions significantly influenced leaf rust than the stripe rust. A significant correlation was observed between leaf rust and maximum and minimum temperature, rainfall and sun shine radiations. However, non significant correlation were found between stripe rust and the environmental conditions. When maximum and minimum temperature increased the leaf rust severity also increased. Similarly the sunshine radiations and rainfall influenced positive effect on the leaf rust. Leaf rust infection on different varieties/lines increased with an increase in sunshine radiations and rainfall.