الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The present study has been conducted to control major insect pests in sugar beet crop through fields experiments with several methods including, First survey the important insect pests which caused great damage for sugar beet crop in the three plantations where found that August plantation was more infected with S. littoralis than the other plantations, while October plantation was infected with P. mixta and C. vittata, and that September plantation was infected with the three insect pests; S. littoralis, P. mixta and C.vittata by less numbers compared with August and October plantation. Second, surveyed the natural enemies associated in the three plantations, where found that August plantation was harbored with True spiders followed by C. carnea followed by Coccinellids, while October plantation was harbored with Coccinellids followed by C. carnea and P. alfierii, and that September plantation was moderate in the predators. Third, Suseptibility of six sugar beet varieties like; Coleopatra, Top, Amina, Nabil, Lilly and Baraka, were found that Nabil and Amina were more resistance than other varieties to sugar beet insects. Fourth, Using silica sources, where addition before agriculture as Ground straw, Burnt straw and Burnt husk by different rates or spraying silica compounds as sodium silicate, magnesium silicate, potassium silicate and nanosilica at different rates were effective of reducing S. littoralis in August plantation and P. mixta and C. vittata in October plantation as well as increasing yield and yield components. Fifth, Application of conventional insecticides, insect growth regulators and biocides were fast effective in reducing the insects in different sugar beet plantations at the same time increasing crop quality by measuring root and foliage yield, sucrose, total soluble solids, juice purity and white sugar. Sixth, laboratory experiments, Evaluate silica compounds, insecticides, insect growth regulators and biocides on 2nd and 4th instar of S. littoralis larvae, the results showed that LC50 values for Chlorpyrifos after 48 h. were 8.5 mg/L for second instar and 33.5 mg/L for fourth instar.