The impact of different nitrogen levels on aphis gossypii and their predatory beetle (Coccinella Septempunctata) Populations, and the growth of plant leaves | [International Journal of Biology and Biotechnology • 2025]

Author(s):

1. Tufail Ahmed Wagan: Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; Department of Plant Pathology, Faculty of Agriculture Science, The University of Larkano, Pakistan

2. Guozheng Yang: MOA Key Laboratory of Crop Eco physiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, P.R. China

3. Ghulam Hussain Jatoi: Department of Plant Pathology, Faculty of Crop Protection, Sindh Agriculture University TandoJam, Pakistan

4. Zulfiqar Ali Abbasi: Department of Agronomy, Faculty of Agriculture Science, The University of Larkano, Pakistan

5. Javeed Shabbir Dar: Department of Agronomy, Faculty of Agriculture Science, The University of Larkano, Pakistan

6. Shahjahan Rajput: Department of Entomology, Faculty of Agriculture Science, The University of Larkano,,Pakistan

7. Hakan Bozdoğan: Kırsehir AhiEvran University, Vocational School of Technical Sciences, Department of Plant and Animal Production,40100, Kırsehir,Turkey

8. Laila Haider: Department of Entomology, University of Agriculture,Faisalabad,Pakistan

9. Hongxia Hua: Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China

Abstract:

The effect of different nitrogen (N) levels on cotton plant vegetative growth, and the occurrence of aphids (Aphis gossypii) and their predatory beetle (Coccinella septempunctata) was studied in an outdoor pot trial on the Experimental Farm of Huazhong Agricultural University. The cultivar “Huamian3109” was sown in pots filled with 33 kg of soil. Five different nitrogen levels - 120, 150, 180, 210 and 240 kg N/ha - were applied at the first flowering stage of the crop. The crop was observed in the morning when the insect pest and predators were not active. Aphis gossypii were recorded by observing 6 leaves per plant and 10 plants in each treatment. C. septempunctata was observed at 10 sites per treatment and each site consisted of 3 plants. The number of leaves on each plant was also counted. The maximum number of C. septempunctata observed was 5.50±0.53/site and the peak population of A. gossypii was 29.10±1.86/plant; these were both recorded at the 5th observation time in the maximum N level treatment group (240 kg/ha), when the plants had on average 28.90±0.74 leaves. Maximum N levels encourage more vegetative growth, which attracts A. gossypii; later, natural enemies appear on the crop and help to control pests. Maximum levels of N fertilizer help an A. gossypii population to develop, but also indirectly cause an increase in the predator population. In this way, a sufficient doze of N fertilizer at a specific time allows more plant growth with limited pest population growth.

Page(s): 313-318

DOI: DOI not available

Published: Journal: International Journal of Biology and Biotechnology, Volume: 22, Issue: 2, Year: 2025

Keywords:

plant growth , pest , predator , Fertilizer effect

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