2015 Volume 2 Issue 1

Total phenol content in thrips infested rice leaves of Khasi Hills

Magdalene Kharbangar, Sudhanya Ray Hajong, Sudipta Choudhury

Thrips infestation in rice leaves causes a considerable leaf yield loss and quality. An attempt was made to know the changes in secondary metabolites constituents (viz, total phenols) in normal and thrips infested cultivated rice leaves of Mawlai (25º 60’ N 91º 90’ E), and Nongjri (25º 74’ N 91º 90’ E) of Khasi Hill. The amount of total phenols, were analyzed using a spectrophotometric technique, based on Folin-Ciocalteau reagent showed significant variation in phenol content from both the sites as compared to the normal rice leaf. Gallic acid was used as standard compound and the total phenols were expressed as mg GAE/g leaf extract. The total phenols varied from 18.89 ± 0.39 to 28.55 ± 0.98 mg GAE/g leaf extract in normal leaf extracts. A higher phenolic content was found in thrips infested leaf extract varying from 287.29 ± 5.06 to 340.3 ± 0.72 mg GAE/g leaf extract in both the studied sites.

Keywords: Rice leaf, normal, infested, phenolic content, secondary metabolites


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Entomology and Applied Science Letters is an international peer reviewed publication which publishes scientific research & review articles related to insects that contain information of interest to a wider audience, e.g. papers bearing on the theoretical, genetic, agricultural, medical and biodiversity issues. Emphasis is also placed on the selection of comprehensive, revisionary or integrated systematics studies of broader biological or zoogeographical relevance. Papers on non-insect groups are no longer accepted. In addition to full-length research articles and reviews, the journal publishes interpretive articles in a Forum section, Short Communications, and Letters to the Editor. The journal publishes reports on all phases of medical entomology and medical acarology, including the systematics and biology of insects, acarines, and other arthropods of public health and veterinary significance.
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