Muhammad Irfan Ullah, Muhammad Arshad, Sajjad Ali, Asad Abdullah, Samina Khalid, Hafiz Muhammad Aatif, Syed Muhammad Ali Zahid, Muhammad Afzal and Jaima Molina-Ochoa, 2020. Using Smartphone Application to Estimate the Defoliation Caused by Insect Herbivory in Various Crops. Pakistan J. Zool., 52: 1129-1135. DOI: https://dx.doi.org/10.17582/journal.pjz/20180721120723