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Sekhar, J. C.
- Management of Post Harvest Pests of Maize in India through Enhanced Hermetic Storage
Authors
1 Winter Nursery Centre, ICAR-Indian Institute of Maize Research, Rajendranagar, Hyderabad (A.P.), IN
2 Pusa Campus, New Delhi, IN
Source
International Journal of Processing and Post harvest Technology, Vol 6, No 1 (2015), Pagination: 48-53Abstract
Effectiveness of hermetic storage in combination with botanical Ageratum conyzoides for the control of post harvest pests of maize Sitophilus oryzae (L.) and Sitotroga cerealella (Oliv.) was evaluated under artificial infestation by different packing materials. It was observed that High density polythene (HDPE) bag and Double Layered Polythene (DLP) bag with A. conyzoides are most effective in controlling S. oryzae and S. cerealella. The number of F1 progeny of S. oryzae and S. cerealella emerged in treatments ranged from 7.75 to 21.70 and 8.70 to 25.50, respectively with each mean being significantly different from each other. Both HDPE and DLP bag in combination with A. conyzoides recorded lowest adult emergence, minimum grain damage and weight loss when infested by S. oryzae and S. cerealella. HDPE bag and double layered polythene bag with A. conyzoides recorded per cent damage of 4, 5.70 and 5.0, 7.0 and minimumlosses of 0.61, 0.94 and 0.37, 0.52 by S. oryzae and S. cerealella, respectively. The results demonstrated that it is technically feasible to control post harvest pests of maize in India through enhanced hermetic storage by utilizing locally available botanicals.Keywords
Botanicals, Hermetic Storage, Maize, Post Harvest Loss, Sitophilus oryzae, Sitotroga cerealella.- Efficacy of New Insecticide Molecules against Spotted Stem Borer Chilo partellus (Swinhoe) in Maize
Authors
1 Maize Research Centre (PJTSAU), Agricultural Research Institute, Rajendranagar, Hyderabad (Telangana), IN
2 Winter Nursery Centre, ICAR-Indian Institute of Maize Research, Hyderabad (Telangana), IN
Source
International Journal of Plant Protection, Vol 11, No 1 (2018), Pagination: 70-72Abstract
Management of spotted stem borer Chilo partellus (Swinhoe) on maize (DHM 117) by insecticides with different concenterations was conducted at Maize Research Centre, Hyderabad, Telangana during Kharif 2015 and 2016. The observations based on leaf injury rating, grain yield and cost benefit ratio showed that flubendiamide 480 SC @0.1 ml followed by flubendiamide 480 SC @0.2 ml and deltamethrin 2.8 EC @ 0.8 ml/l of water proved highly effective and economical in reducing the C. partellus damage.Keywords
Maize, Spotted Stem Borer, Chilo partellus, Leaf Injury Rating, Insecticides, Evalution.References
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- Incidence of Egg and Larval Parasitoids of Chilo partellus on Kharif Maize
Authors
1 Division of Entomology, ICAR-Indian Agricultural Research Institute, New Delhi - 110012, IN
2 ICAR-Indian Institute of Maize Research, Pusa Campus, New Delhi - 110012, IN
3 ICAR-Winter Nursery Centre, Rajendernagar, Hyderabad - 500030, Telangana, IN
4 49/3, Grainger Avenue, Ashfield-2131, NSW, AU
5 Agricultural Experimental Station, At and Post Paria-396145, Valsad, Gujarat, IN
6 Harnathpura, Post-Jorpura-303328, Via Jobner, Rajasthan, IN
Source
Journal of Biological Control, Vol 34, No 1 (2020), Pagination: 37-42Abstract
The incidence of egg and larval parasitoids of Chilo partellus was monitored in insecticide free maize fields at the Indian Agricultural Research Institute, New Delhi, for three Kharif seasons of 2013 to 2015. The hymenopteran parasitoid, Trichogramma sp. was recorded to be the only egg parasitoid in this area, while a good number of larvae were parasitized by braconid, Cotesia flavipes. The egg parasitism was recorded on the freshly laid eggs of stem borer obtained by artificially releasing the adults of C. partellus on maize cultivars, HQPM1 and PMH1, at 12 days after germination. There was no egg parasitism recorded during Kharif 2013 and 2014, whereas 5.6 percent egg-mass parasitism by Trichogramma sp. was recorded during Kharif, 2015. The larval parasitoids were monitored by artificially infesting the maize plants with neonates of laboratory reared C. partellus. The larvae were allowed to develop on maize plants under field conditions for 20 days. The plants showing stem borer damage were cut and brought to the laboratory. The larvae collected from infested maize plants were reared in the laboratory. The maggots of C. flavipes recovered from parasitized larvae ranged from 29-100, 41-50 and 20-80 percent during Kharif 2013, 2014 and 2015, respectively. The result of this study indicated that parasitism by Cotesia was influenced by age of plants damaged by C. partellus. The young maize plants seemed to be more attractive to the foraging of Cotesia and more stem borer larvae were parasitized on these plants as the maximum (58 percent) parasitism was observed at 40-day-old crop. The parasitoid was found to be active on maize from 40-60 days after germination and the incidence decreased thereafter. Insecticides should not be used during this period. The current studies also revealed that host densities had no significant effect on percentage parasitism by Cotesia.
Keywords
Biocontrol, Chilo partellus, Cotesia, Maize, Trichogramma.References
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