A biotic and biotic factors influnece on major okra pests with asocciated predators and okra crop yield [electronic resource].

Includes references.

A field experiment was carried out at Qaha experimental station, Qalubia Governorate in order to study the effect of planting spaces on Okra sap sucking pests and asocciated predators included each of Aphids (Aphis gossyoii),White fly,(Bemisia tabaci Genn.), Jassid (Empoesca decipiens (paoli) and Red spider mite, ( Tetranychus urticae koch) and the associated predators Coccinellidae family and Chrysoperla carnea , in addition to estimate Okra yield during 2013 & 2014 seasons. The obtained results recorded that a relationship between incidence of these pests in control and planting spaces 50, 60 and 70 cm. the highest population abundance of these pests increase by decreasing planting space, also, the predators increased by decreasing the planting space. On the other hand, the crop yield of Okra increases by increasing planting spaces. The highest yield was obtained in case of 70 cm. space, where the mean yield was 74.2, 83.1 Kg. in 2013 and 2014, opposite to 69.6 & 62.07 Kg. in control treatment, causing percent increase 42.48 & 33.88% than control in 2013 and 2014, respectively.

Summary in Arabic.

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