Evaluation of management strategies against two spotted mites (Tetranychus urticae C.L. Koch) under organic strawberry production in Cordillera

Issue Date

10-2017

Abstract

Strawberry is a high valued fruit crop in the Cordillera and commercial production is mostly found in LA Trinidad, Benguet. At present, organic production is being promoted. One limiting factor is the attack of two-spotted spider mites (Tetranychus urticae C.L. Koch), one of the major pests attacking strawberry. To manage the pest, the effect of Beauveria bassiana (Bals.-Criv.) Vuill. And Metarhizium anisopliae ( Metchnikoff) Sorokin as biological control agents, three agricultural oil sprays, wood vinegar, and eight plant extracts were evaluated. The evaluated strategies significantly reduced T. urticae population resulting to less damaged strawberry plants and higher yield compared to untreated plants. B. bassiana and M. anisopliae using MA-RBB and MA-RB isolates at 300g of each fungus grown in cracked corn kernels per 16 L water, mineral oil at 1-1.5%, and hot pepper and ginger extracts at 30-40 ml/L water sprayed at 1-2 weeks interval were found more effective against two-spotted spider mites. These management strategies should be applied at early stage of mite infestation where population is still low and should be integrated with other existing organic pest management practices results to safe and quality fruits. Also, a grower cultivating a limited area of 500 sq.m. could have a net income of PHP43,325.00 with ROCE of 88.77%.

Source or Periodical Title

The Philippine Entomologist

ISSN

0048-3753

Volume

31

Issue

2

Page

174

Document Type

Article

Frequency

semi-annually

Language

English

En – AGROVOC descriptors

FRAGARIA ANANASSA; TETRANYCHUS URTICAE; METARHIZIUM ANISOPLIAE; BEAUVERIA BASSIANA; INSECTA; PESTS, FRUIT DAMAGING INSECTS; PESTS OF PLANTS; BIOLOGICAL CONTROL AGENTS; PEST MANAGEMENT; ECOLOGICAL PRODUCTION; INFESTATIONS; PHILIPPINES

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