The study was carried out at the research station of the Department of Crops Faculty of
Agriculture, Omar Mukhtar University, Al-Bayda - Libya during the agricultural season 2005 – 2006 to study
the effect of different rates of fertilizer on Aphis fabae Scopoli and bean yields. The results showed that there is
a relationship between the numerical density of the pollen and the different fertilizer levels, where the results
showed the following: 1- the highest numerical density of Aphid is on the beans when add in Aphid to the
laboratory beans by 0.0 nitrogen ,144 Phosphorus, 144 potassium, while it decreased to 65.0 upon addition
when adding 30 nitrogen and 144 phosphors and 0.0 potassium and these levels negatively affect the number of
seeds and the number and pods for different levels and rates. 2- The flowering characteristic is delayed for
(116.5) days upon addition of 144 kg/ ha phosphorus, 144 potassium and 30 kg/ ha nitrogen. 3- The effect of
plant height on fertilization levels, as the highest was 50.3 cm, either when adding 144 kg/ ha phosphorus, 57
kg/ ha potassium and 60 kg/ ha nitrogen and there were significant differences between numbers of branches at
fertilization levels. 4- Also, it was found that there were significant differences between the weight of pods, had
the most weight when the reaction of 74 phosphorus, 57 potassium and 60 nitrogen kg /ha which was 12.25.