Insecticidal activity and product formulations of plant extracts on tomato fruitworm (Helicoverpa armigera Hubn.)

Issue Date

10-2013

Abstract

With the rising concern for environmental safety and human health, development of alternative control methods against tomato fruitworm in tomato was given concern the use of biopesticides among them. Plants with known pesticide properties were selected and collected based on available information in literature and farmers' experience in the use of plant biopesticides. To ascertain pesticidal activity, juices of plants that showed positive effect as antifeedant during the preliminary screening like Cleomeviscosa, Argemonamexicana, Euphorbiahirta, Tabernaemontanapandacaqui were extracted with suitable solvents. Choice test was made using 2nd instar larvae. These were later combined and formulated to enhance the toxicity, then further tested under field conditions. Results showed that the different extracts have antifeedant activity against the 2nd instar larva of tomato fruitworm. Differences in length of larval and pupal periods were observed. Some died and did not reach the pupal or adult stage. Comparable results were also obtained when tested under field conditions. Effects of the formulated products and the positive control did not differ significantly as compared that of the negative control which gave the highest larval population count. The promising materials will be further tested in farmers' fields for verification and to assess social acceptability of the formulated products.

Source or Periodical Title

The Philippine Entomologist

ISSN

0048-3753

Volume

27

Issue

2

Page

212

Document Type

Article

Frequency

semi-annually

Language

English

En – AGROVOC descriptors

HELICOVERPA ARMIGERA; TOMATOES; PLANT EXTRACTS; PESTS CONTROL; NSECTICIDES; BIOPESTICIDES

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