Field evaluation of fluendiamide insecticide (FENOS 480SC) for the control of tomato fruit worm

Issue Date

10-2008

Abstract

The study was conducted in Daine Indang, Cavite to (a) evaluate the efficacy of Fluendiamide insecticide against fruit worm and other lepidopterous insect pests of tomato; and (b) determine the most effective dosage of the insecticide and compare it with known standards in the market. A total of 20 experimental plots measuring 20 m2 each were used in the study. Five treatments were made, namely: untreated control, Fluendiamide (25, 50, 75 ml / ha) and Selecron EC (500m //ha) as standard control. Weekly treatment was done from flower setting to fifth week of harvesting. Data gathering was done day before and two days after treatment application. Bi-weekly observations were taken to monitor presence of insect pests and diseases of tomato from vegetative to fruiting stages of growth. Prior to treatment, blanket application of insecticide was done to control the attack of insect pests other than fruit worm. Fluendiamide significantly reduced the level of fruit worm infestation. At the lowest dosage of 25 g/ha, the mean weekly counts of fruit worms was 7.4 per 20/plants compared to 75.9 in untreated control. The effect of higher dosages of Fluendiamide on fruit worm population did not differ significantly from that of the lowest dosage tested. The untreated plants yielded the highest number of damaged fruits per 20 plants while Fluemdiamide treated plants had the least number of damaged fruits. On per hectare basis, the fruit worms caused 25.51% damage on untreated plants and only 1.23 to 3.23% on Fenos-treated plants. The insecticides tested had no phytotoxic effect on the plants. The untreated plants had the lowest yield of marketable fruits (10.59 kg / 20 plants). Losses per 20 tomato plants treated with Fenos were only 0.40 kg, 0.16kg, and 0.26 kg for treatment dosages of 25, 50, and 75 g/ha, respectively, compared to untreated plants with a mean loss of 4.3 kg. Plots treated with Fluendiamide, at a dosage of 50 g/ha, had the highest marketable fruit yield of 16.69 kg/ 20 plants although this was not significantly different from the numerically lower marketable yields obtained from plants treated with Fluendiamide at a dosage of 75g'ha (13.98 kg) and Selecron (12.68 kg).

Source or Periodical Title

Philippine Entomologist

ISSN

0048-3753

Volume

22

Issue

2

Page

215

Document Type

Article

Frequency

semi-annually

Language

English

En – AGROVOC descriptors

LEPIDOPTERA; INSECTA; PEST INSECTS; INSECTICIDE; INFESTATION; PLANT DISEASE; PHILIPPINES

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