A Study on Using Entomopathogenic Nematodes (Steinernema siamkayai) And Indigo (Indigofera tinctoria L.) on Pest Control in Tomato

Abstract

This study on using nematodes and indigo on pest control in tomato crops was planned using a randomized complete block design and the design obtained comprised 3 blocks and 6 treatments. Treatment 1 was administered by 10 million nematodes/water 10 ml, treatment 2 by residue of indigo 10 kg/plot, treatment 3 by tea-colored fermented indigo 100 ml/water 10 l, treatment 4 by residue of indigo 10 kg/plot and 10 million nematodes/water 10 ml, treatment 5 by tea-colored fermented indigo 100 ml/water 10 l and 10 million nematodes/water 10 ml, and treatment 6 by tap water (control). The experiment was conducted at plant science laboratory plots of Sakon Nakhon Rajabhat University.

                Findings of the study showed as follows. The effect of nematodes and indigo on pest control in tomato after the stage of growing in the plot up to the stage of inflorescence found that after the 4^th time tomato spraying with nematodes and tea-colored fermented indigo, cotton bollworms’ tomato destruction was significantly different from treatment with nematodes and tap water but not significantly different from indigo residue and tea-colored fermented indigo. Treatment with nematodes together with tea-colored fermented indigo resulted in minimal cotton bollworms average 0.33 counts/plot, followed by treatment with nematodes and indigo residue average 0.66 counts / plot.