Journal of Pharmacognosy and Phytochemistry
Vol. 8, Issue 4 (2019)
Fumigant toxicity and repellent activity of some essential oils against stored grain pest Rhyzopertha dominica (Fabricius)
Rashmi Joshi and Dr. SN Tiwari
Grain storage is an integral component of post-harvest management practices. In India approximately 10.0 per cent of food grain is lost during storage half of which is accounted for insect pests which may go up to 40% losses in case of some insects. Rhyzopertha dominica
(F.) (lesser grain borer, Coleoptera: Bostrichidae) is major pest of stored grain in India, it may cause up to 40% of grain loss as compared to other stored grain pests. Although there have been certain insect management practices like use of synthetic pesticides but due to increasing concern of pesticide residue in grains has encouraged researchers to look for some other alternatives. In one such attempt fumigant toxicity and repellent activity of some essential oils derived from Murraya koenigii
, Callistemon citrinus, Citrus limetta
, Curcuma longa
and Pinus roxburghii
were tested against R. dominica
. Insect was allowed to breed and feed for one month and then the number of adults emerged were counted. It was found that there was almost 100% inhibition against this pest in all the essential oils when used in 0.1% concentration. Different combinations were also prepared from these essential oils and then also it was observed that not less than 99.05 % inhibition was observed. High repellency was observed falling under class 4 and 5 when insect was tested against all the essential oils used in study. Thus the results observed indicates that these essential oils may revolutionize post-harvest management technology of grain storage by providing quality food and environmental friendly approach.
Pages: 59-62 | 1865 Views 592 Downloads
Rashmi Joshi and Dr. SN Tiwari. Fumigant toxicity and repellent activity of some essential oils against stored grain pest Rhyzopertha dominica (Fabricius). J Pharmacogn Phytochem 2019;8(4):59-62.