Evaluation of botanicals and insecticides against Sitotroga cerealella(Olivier) on stored paddy seeds

Abstract

SUMMARY :Rice, Oryza sativa L. is the most economically important food crop grown by millions of people in India. It plays a major nutritional role in the diet of people of many developing nations (Norman and Kebe, 2006; FAO, 2013).The productivity of rice is threatened by a wide range of pre and post harvest pests (Ashamo and Akinnawonu, 2012). Stored product insect pests such as Sitophilus oryzae (Linnaeus), Sitophilus zeamais (Motschulsky), Rhyzoperthadominica (Fabricius) and Sitotroga cerealella (Olivier) are usually seen on rice in most of the stores. An experiment was conducted at Seed Research and Technology Centre, Rajendranagar, Professor Jayashankar Telangana State Agricultural University, Hyderabad during 2015-16 to study the efficacy of botanicals on storability of paddy seeds through seed treatments. The storage studies revealed that among botanical seed treatments, significantly highest seed germination was recorded inseeds treated with Acorus calamus @ 10ml per kg seed (96.33%) followed by Karanj oil @ 5ml per kg seed (90.33%) and the lowest in untreated seeds (80.67%). Significantly highest seedling vigour was also observed in Acorus calamus @ 10ml per kg seed (1947) followed by Karanj oil @ 5ml per kg seed (1853) while significantly lowest seedling vigour index was recorded in untreated control (1458). Though lowest seed infestation was recorded in Karanj oil @ 5 ml/kg seed (5.3 %) but it was on par with Acorus calamus (8.0 %) at the end of twelve months of storage. Among the various treatments, Acorus calamus and Karanj oil were found to be superior in maintaining seed quality through out the storage period over control. In all the treatments, seed quality parameters declined progressively with increase in storage period. The average germination per cent age and vigour index of the seed at the beginning of storage period was 99.10 per cent and 3556, respectively, which declined to 90.71 per cent and 1766.71, respectively at the end of 12 th month of storage.How to cite this article : Padmasri, A., Srinivas, C., Kumar, B. Anil and Parimala, K. (2017). Evaluation of botanicals and insecticides against Sitotroga cerealella (Olivier) on stored paddy seeds.

Chemical composition and toxicity of some Agro waste-derived insecticides against Angoumois grain moth, Sitotroga ceralella (Olivier) [Lepidoptera: Gelechiidae] infesting stored paddy grains

“…Rice, Oryza sativa, is an essential component of staple foods playing a major nutritional role in the diet of people of many developing nations (Norman and Kebe 2006;FAO 2013;Padmasri et al 2017). Rice is becoming an essential source of cash for farmers in developing countries such as Nigeria.…”

“…Rice is becoming an essential source of cash for farmers in developing countries such as Nigeria. However, rice production is threatened by a lot of lepidopteran and coleopteran pests (Ashamo and Akinnawonu 2012;Padmasri et al 2017). Stored paddy is susceptible to a large numbers of preand post-harvest pests which cause losses of about 4.09-12.61% of world paddy production, if not unchecked Page 2 of 12 Ashamo et al Bull Natl Res Cent (2021) 45:25 (Adam 1998; Shafique and Ahmad 2003;Mahmood 2018).…”

“…There is need for cheap, eco-friendly and biodegradable methods for safe storing of paddy. An indigenous source of insecticide from plant products as repellents against paddy moth, S. cerealella, has been reported by many researchers for more than two centuries (Ashamo and Akinnawonu 2012; Ashamo and Ogungbite 2014; Ileke 2014; Padmasri et al 2017;Mahmood 2018). Plant productsderived insecticides definitely have active ingredients that persist for a long time with minimal or no adverse effect on germination and cooking qualities (Prakash and Mathur 1981;Mahmood 2018).…”