Helicoverpa armigera - pest control on tobacco

Krsteska, Vesna and Srbinoska, Marija and Stojanoski, P. (2015) Helicoverpa armigera - pest control on tobacco. In: 70 years Institute of Agriculture Skopje Scientific conference: “Challenges in modern agricultural production.

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Abstract

Helicoverpa armigera is a pest of major importance in areas in which are produced certified tobacco seed. In severe infestations larvae, may destroy them completely: flowers, seed capsules, also top leaves. During 2011-2013, field trials were carried out on the Experimental field of Scientific Tobacco Institute-Prilep, for the control of H. armigera, with three insecticides: chlorpiriphos (Pyrinex 48 EC)- 0,15%, metomil (Metomyl 90-SP) -0,06%, chlorpiriphos+cypermetrin (Nurell D)- 0,15%. During tobacco vegetation H. armigera occurs with a different quantitative representation, depending on the climatic conditions in 2011-2013. Besides climatic conditions, entomophages, entomopathogens, cannibalism limits the number of insects per plant. The all applied insecticides showed high effectiveness in tobacco bollworm control. The highest efficacy in the control of this pest was obtained with the insecticide (Nurell D)- 0,15%. The best moment for treatment with an insecticide is while the larvae are very small (L1 or L2). Larvae during L5 and L6 consume about half of their overall diet. Older larvae burrow into the floral organs where they become less accessible to contact insecticides, require higher doses to kill and cause direct economic loss. Having in mind its considerable pest significance, great efforts and precise measures for H. armigera control are needed to achieve visible results.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: tobacco, H. armigera, integrated control, insecticides
Subjects: Scientific Fields (Frascati) > Agricultural Sciences > Agriculture, forestry and fisheries
Divisions: Scientific Tobacco Institute
Depositing User: Ms Biljana Jordanoska
Date Deposited: 08 Oct 2016 23:07
Last Modified: 08 Oct 2016 23:07
URI: http://eprints.uklo.edu.mk/id/eprint/314

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