Combined Effect of Silica Applications and Nitrogen Fertilizers on Two Rice Cultivars and Infestation Rate by Stem Borer, Chilo agamemnon Bles

Saleh, H. A.; Taha, A. S.; AL-Mokadem, AL-Shymaa Z.

doi:10.21608/jppp.2020.87017

Combined Effect of Silica Applications and Nitrogen Fertilizers on Two Rice Cultivars and Infestation Rate by Stem Borer, Chilo agamemnon Bles

Document Type : Original Article

Authors

¹ Plant Prot. Res. Inst., Agric. Res. Centre, Dokki. Giza, Egypt

² Rice Res. Dept., Field Crops Res. Inst., Agric. Res. Center, Egypt

³ Biology Dept., College of Science and Arts, Al Jouf Univ., Al-Qurayyat, Al Jouf, Saudi Arabia and Botany Dept., Women's College, Ain Shams Univ., Cairo' Egypt.

10.21608/jppp.2020.87017

Abstract

Field experiments were conducted at Sakha, Kafr El-Sheikh, Egypt; to investigate the effect silica combined with mineral nitrogen on rice yield, and stem borer Chilo agamemnon Bles. Applying potassium ore combined with 92 kg N/fed. Produced the highest panicles/m² (814.31) compared to other silica applications or lower nitrogen levels. The same trend was observed with panicle weight. One-thousand grain weight was higher in Egyptian hybrid 1 than in Giza 178. The grain yields were also highest with potassium ore for both cultivars at the rate of 92 kg N/fed. Rice stem borer infestation was higher in hybrid than in inbred cultivar. Both dead hearts and white heads gradually increased by the increase of nitrogenous applications; from 2.65 to 4.14 % dead hearts, and from 3.77 to 5.59 % white heads due to nitrogenous increase from 23 to 92 kg/fed., respectively. The highest dead hearts (4.92 & 5.28) and white heads (9.42 & 7.06 %) were detected in plots without silica. From the data of this experiment, it could be concluded that Egyptian hybrid 1 yielded more than Giza 178, particularly with using 92 kg N/fed., combined with potassium ore at 500 kg/fed.. It was found that silica applications reduced the stem borer infestation, regardless of the cultivar and nitrogen rates.

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