Field evaluation of some commercial products against spider mites (Tetranychus spp) and their common predatory mites on cotton plants

Document Type : Original Article

Authors

1 Central Pesticides Laboratory, Sabahia Station

2 Pesticide Chemistry Dept., Faculty of Agriculture, El-Shatby, Alexandria University

10.21608/jpces.2002.459577

Abstract

The effects of M-pede (saponified fatty acid), Biofly (Beauveria bassiana), Natrilo (natural oil) and Marshal (carbosulfan) on spider mites Tetranychus spp. and their predatory mites, Agistemus exertus and Tydues californicus were examined on cotton fields. Tested treatments were applied at recommended and half recommended rates as follows: 3, 1.5 liter/feddan for M-pede; 400, 200 ml/feddan for biofly, 300, 150 g/feddan for carbosulfan and 1250, 625 ml/feddan for natrilo. Natrilo at the higher rate, showed the highest reduction of Tetranychus spp infestation, while at the lower rate had the lowest reduction. In the meantime, other treatments showed moderate reduction of infestation throughout fifteen days of application. Moreover, there were no significant differences between the tested treatments except for the Natrilo treatments (1250 and 625 ml/f). The side effect of the tested compound treatments on the predatory mites revealed that there were no pronounced effects on A. exertus when the lower rate was used.
Journal of Pest Control and Environmental Sciences
Volume 10, Issue 1
2002
Pages 55-67

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