Releasing of the Predatory Mite, Neoseiulus californicus (McGregor) for Controlling the Citrus Red Mite, Panonychus citri (McGregor)

Document Type : Original research articles

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Plant Protection Research Institute , Agri. Res. Center, Dokki, Giza, Egypt

Abstract

To determine the most convenient releasing level of the predatory mite. N. californicus for reducing numbers of the citrus mite, P. citri L. an area with dimension 65.5 x 35 meter cultivated with 70 trees of Navel orange was chosen for the experiment. The treated lines were divided to three groups, each group contained two lines, the first was for low releasing of  the predatory mite, Neoseiulus californicus (75 females and 25 males/ tree) and the second for high releasing treatment (150 females  and 50 males/ tree). The first and second groups were assigned to one and twice releases, respectively; while the third group for three. One line  was left without releasing, as control, located in  the area left side. Two lines were left, to isolate between the three-treatment groups and one line to isolate the treatment groups from the control line. Results demonstrated the ability of Neoseiulus californicus, to regulate Panonychus citri populations. Moderate reduction of Panonychus citri was from  predator single release but didn't  prevent the pest from exceeding the economic threshold level.  Multiple releases with rates 100 predator fmales and 50 males/tree were the best for suppressing Panonychus citri population and preserving it from exceeding the economic threshold level.

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