Field and laboratory experiments were conducted at Taifaa region and Agricultural research station, Kafr El-Sheikh Governorate, during two successive seasons 2019/2020 and 2020/2021. To estimate the efficiency of alternative materials for controlling Spodoptera littoralis, some silica sources were incorporated to the soil such as (straw and husk) and sprayed on the plants, spray such as potassium, magnesium, sodium silicate and Si NPs. Burnt husk added to the soil at the rate of 200 g/m 2 gave the highest reduction 50.