Effect of black pepper (Piper nigrum L.) oil extract on cotton leaf worm instars Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae)
Maǧallaẗ al-Anbār li-l-ʿulūm al-zirāʿiyyaẗ/Maǧallaẗ al-anbār li-l-ʻulūm al-zirāʻiyyaẗ