Effect of Potassium Fertilization on The Main Piercing-Sucking Insect Species Infesting Maize Plants

Abstract

This study was carried out to survey the main piercing-sucking insect species that infesting maize plants in Zagazig district, Sharkia Governorate, Egypt during 2020 and 2021 seasons, in addition to estimate the effects of potassium fertilization on populations of aphid, leafhopper and planthopper insects. Plant samples, sweeping net, yellow sticky broad traps were used to collect these piercing-sucking insects from different potassium fertilized maize plants. Results showed that aphid species that infesting maize plants were Rhopalosiphum maidis, R. padi, Aphis gossypii, the leafhoppers were Empoasca decipiens, E. decedens, Cicadellina chinai, C. bipunctella zea and Balclutha hortensis, and the planthoppers were Sogatella vibix and S. furcifera. Potassium fertilization of maize plants influenced the population density of the aforementioned homopterous insect species. The highest mean number of the aforementioned homopterous insect species occurred with F1 (zero potassium fertilization) treatment, while the lowest population density was recorded with F4 (150 kg. Potassium sulphate/feddan). Chemical analysis showed a reverse relationship between protein and carbohydrate contents and aphid, leafhopper and planthopper populations on all tested potassium fertilized maize plants, while a positive relationship between pH values and the aforementioned insect populations was obtained.

Influence of Potassium Fertilization on the Incidence of Sucking Insect Pests on Cucumber

“…This may explain the decrease in insect numbers with increasing rates of fertilization. Based on these findings, potassium fertilization is recommended as an effective component in IPM for maize (Ata et al, 2022;Hegab and Hegab, 2020), and barley (Elsamed and Eisa, 2017) In cucumber and squash increasing the amount of potassium fertilizer caused a reduction in the population density of A. gossypii, B. tabaci and Earias insulanain in cotton (Hegab and Hegab, 2009) Awad (2022) investigated the influence of potassium fertilizer and organic nutrient (Reef Amirich) on the population density of B. tabaci and T. tabaci. Results showed that potassium sulphate fertilization rates (50, 100 and 150 kg/ ha) and organic nutrient (0.8 and 1.6ml/ l) reduced the population of B. tabaci and T. tabaci.…”