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Abstract: This research was conducted in experimental field at University of Rajshahi during March 15, 2019 to June 14, 2019 to investigate the efficacy of aquous extracts of tweleve botanicals for insect pest management in amaranth (Amaranthus viridis L.) field and phytochemicals of the potent extracts. Green Callaloo amaranth (locally called Kathua danta) was used as a test crop for the experiment. During this study, a less number of insect pest attack on amaranth leaves was observed in Jackfruit (Artocarpus heterophyllus) leaves extract treatment, whereas a higher number of insect pests were found in the Eucalyptus (Eucalyptus obliqua) leaves extract treatment. Jackfruit (Artocarpus heterophyllus) treatment promoted about 1.37 times better performance than that of control treatment. The extract of Jackfruit leaves showed the best performance against amaranth leaves perforation caused by insect pests, whereas a high number of amaranth leaves perforation by pests were found in the control treatment. Jackfruit leaves treatment showed the best performance on plant height of amaranth and the lowest height of amaranth plant was found in Turmeric (Curcuma longa) leaves. Jackfruit leaves treatment induced about 1.42 times better plant growth than that of control treatment. The treatment of jackfruit (Artocarpus heterophyllus) also produced the highest yield of Amaranth, whereas the lowest amaranth yield was found in turmeric (Curcuma longa) leaves. The yield of amaranth in jackfruit treatment was 138.79% higher over the control treatment. Therefore, Jackfruit (Artocarpus heterophyllus) leaves extract can be used as bio-pesticide for the control treatment of insect pests in amaranth field.The presence of phyto-chemicals like alkaloids, tannin, anthraquinone, saponin and terpenoids in jackfruit leaves might be responsible for the pest control in amaranth field .
Keywords: Amaranth, pest, botanicals, efficacy, jackfruit leaves
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