The impact of different plant extracts on population suppression of Helicoverpa armigera (Hub.) and tomato (Lycopersicon esculentum Mill) yield under field conditions. oleh Shahbaz Ali, Yunzhou Li, Inzamam Ul Haq, Waseem Abbas, Muhammad Zeeshan Shabbir, Muhammad Musa Khan, Mehmet Mamay, Yasir Niaz, Tahir Farooq, Milan Skalicky, Ali Tan Kee Zuan, Omaima Nasif, Mohamad Javed Ansari