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The old world date mite (dust mite) Oligonychus afrasiaticus

(McGregor) is one of the major pests of date fruit in the New Valley

Governorate of Egypt. This pest mite affects the fruits of palm trees

during the growth and ripening stages as they sucking the fruit juice,

leading to stop fruit growth and destroying the crop. This research was

carried out in Sharq El-Owainat province for evaluating the effects of

biochemical acaricide (Vertimec 1.8% EC as 40 ml/100 liter of water),

four acaricides (i.e. Abroch 5% SC as 50 ml/100 L of water, Challenger

Super 24% SC as 60 ml/100 L of water, Envidor 24% SC as 30 ml /100

L of water and Ortus Super 5% EC as 50 ml/100 L of water), one

insecticide (Tafaban 48% EC as 300 ml/ 100 L of water), a mineral oil

(KZ oil 95% EC as 1L/100 L of water), sulfur (Micronite 80% WP as

500 g/100 L of water) and water for O. afrasiaticus in two date palm

cultivars Barhi and Bartmoda. Results indicated that in date palm

cultivar Barhi, Challenger Super and Vertimec were the most effective

ones in reducing date palm mite population reaching 91.93% and

91.60%, respectively, followed by Abroch, Ortus Super, Tafaban and

Envidor which gave reduction ranged between 85.07% to 87.74%.

Micronite, KZ oil and water gave reduction between 71.77 and 82.82%

after two weeks of application. Challenger Super, Vertimec, Ortus Super

and Envidor were the most effective ones in reducing O. afrasiaticus

population reaching 95.37%, 94.18%, 91.05% and 90.34%, respectively

in date palm cultivar Bartmoda. Abroch, KZ oil, Tafaban, and Micronite

was gave reductions between 77.79% and 82.74%. The lowest was water

(61.93%) after two weeks of application. We suggest that use Challenger

Super, Vertimec, Ortus Super and Envidor were the most effective ones

in reducing O. afrasiaticus populations.