Juvenomimetic activity of extracts of <i>Thevetia neriifolia</i> Juss. to <i>Dysdercus cingulatus</i> F. (Hemiptera: Pyrrhocoreidae)

Juvenomimetic activity of extracts of <i>Thevetia neriifolia</i> Juss. to <i>Dysdercus cingulatus</i> F. (Hemiptera: Pyrrhocoreidae)

Authors

  • Hebsy Bai Department of Entomology, College of Agriculture, Vellayani, Thiruvananthapuram 695 522, Kerala
  • George Koshy Department of Entomology, College of Agriculture, Vellayani, Thiruvananthapuram 695 522, Kerala

Keywords:

Botanical pesticides, red cotton bug, ecological pest management

Abstract

Ethanol extracts of fresh leaves and seeds of Thevetia neriifolia were tested for juvenomimetic action on red cotton bug, Dsydercus cingulatus, an important pest of cotton and okra. Conspicuous activity, based on larval mortality, duration of ovipositional period, emergence of malformed adults and reduced fecundity of the bugs, were noticed in 40% leaf and 10% seed extracts. Although moderate activity was seen in 20% leaf and 5% seed extracts, no significant effect was observed for the 10% leaf and 2.5% seed extract treatments.

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Published

28-10-2006

How to Cite

Bai, H., & Koshy, G. (2006). Juvenomimetic activity of extracts of <i>Thevetia neriifolia</i> Juss. to <i>Dysdercus cingulatus</i> F. (Hemiptera: Pyrrhocoreidae). Journal of Tropical Agriculture, 42, 45–47. Retrieved from https://jtropag.kau.in/index.php/ojs2/article/view/115

Issue

Vol. 42 No. 0 (2004): Journal of Tropical Agriculture

Section

Short communications

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