Earias vittella management by utilizing obnoxious weeds extracts of Jammu and Kashmir Himalayas, India
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ORIGINAL RESEARCH ARTICLE
Earias vittella management by utilizing obnoxious weeds extracts of Jammu and Kashmir Himalayas, India Reena 1 & M. Sharma 2 & S. K. Singh 3 & Anil Kumar 4 & B. K. Sinha 5 & A. P. Singh 1 Received: 12 March 2020 / Accepted: 28 September 2020 # African Association of Insect Scientists 2020
Abstract All the three agro-ecological zones (sub-tropical, intermediate and temperate) of the Jammu province were surveyed for potential pesticidal plants. Methanol extracts of all the thirteen plants / plant parts and fractions were assessed for insecticidal activity. Eight treatments (T3 –Boerhavia diffusa stem methanolic extract, T6 –Boerhavia diffusa roots methanolic extract, T7 –Boerhavia diffusa roots hexane fraction, T12 –Arisaema flavum stem + leaves methanol extract, T13 –Arisaema flavum stem + leaves hexane fraction, T14 –Arisaema flavum stem + leaves acetone fraction, T15 –Arisaema flavum roots / tubers methanol extract and T17 –Arisaema flavum roots / tubers acetone fraction) recorded cent percent mortality of first instar larvae, within four hours. All the extracts / fractions evaluated against Earias vitella exhibited contact toxicity, and ovicidal action. The growth indices were also affected. Few extracts / fractions were so toxic that they exhibited 100% control. When larvae were fed on extract / fraction treated food for growth indices studies, in many cases larvae died. These extracts/ fractions have great potential to be developed as botanical pesticide. Active pesticidal compounds from few promising plants may be extracted and further studied for their pesticidal activity. The present studies suggest that the plant extract may be fractionated for better results. Keywords Earias vittella . Botanicals . Pesticidal activity . Jammu province . Plant extracts
Researchers are looking for alternatives to chemical pesticides, with the increasing safety and health concerns. Besides, pyrethroids and neem products, other plant products need to be explored for their pesticidal potential. Plethora of literature is available on pesticidal activities of several plants extracted with different solvents, but very few have been exploited commercially. Though pesticide consumption in India has declined from 75,033 t in terms of technical grades * B. K. Sinha
Reena [email protected] 1
ACRA, Dhiansar, SKUAST, Jammu, Bari Brahmana 181133, India
2
KVK, Poonch, SKUAST-J, Jammu, Jammu and Kashmir 180009, India
3
OFRC, SKUAST-J, Chatha, Jammu and Kashmir 180009, India
4
Division of Agronomy, Faculty of Agronomy, SKUAST –J, Chatha, Jammu and Kashmir 180009, India
5
Division of Plant Physiology, Faculty of Basic Sciences, SKUAST – J, Chatha, Jammu and Kashmir 180009, India
in 1990–91 to 50,583 t in 2011–12 (CRRI), and biopesticides use has increased 66 times in India in 10 years from 123 t in 1994–95 to 8110 t in 2011–12, cancer cases are on a rise. Use of chemical pesticides is implicated to be one of the foremost reasons for such a rise. The present study is an attempt to reduce, the pesticida
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