Browsing by Author "Rajamanickam, K."
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Item Biological management of leaf blight disease of coconut using rhizosphere microbes(2014-12) Johnson, I.; Meena, B.; Rajamanickam, K.The production and productivity of coconut is seriously affected by various factors including pest and diseases. Among the foliar diseases, the leaf blight caused by Lasiodiplodia theobromae is a serious problem accounting 10-24 per cent yield reduction in Tamil Nadu. Several fungicides were found to be effective for the management of coconut leaf blight disease. Continuous use of fungicides leads to inherent ill-effects like residual toxicity, resistance to fungicide, environmental pollution etc. Hence, biological control is the only alternative method which is cheap, easy to use and eco-friendly. In the present study, a total of twenty five fungal (Trichoderma viride) and bacterial (Pseudomonas fluorescens and Bacillus subtilis) antagonists were isolated from the rhizosphere soil and screened against L. theobromae. In vitro evaluation revealed that the rhizospere bacteria P. fluorescens isolate Pf1 was found to be highly effective against L. theobromae compared to the other bacterial and fungal antagonists. Further, the best antagonist Pf1 was evaluated as root feeding of 100 per cent culture suspension with different combinations and durations for two years (2010-11 and 2011-12) against leaf blight disease under field condition in three different locations viz., Kambalapatti, Karianchettipalayam and Samathur villages of Pollachi taluk, Coimbatore. Observations were recorded on 0-5 scale and the per cent disease index (PDI) was calculated. Among the treatments imposed, root feeding of P. fluorescens culture suspension @ 25 mL at quarterly interval combined with soil application of P. fluorescens talc formulation (50 g) + Neem cake 5 kg was found to be the best and significantly reduced the incidence to 12.9, 11.9 and 7.9 per cent during 2010-11 and 8.1, 8.1 and 6.5 per cent during 2011-12 in the locations viz., Kambalapatti, Karianchettipalayam and Samathur, respectivelyItem Ecofriendly management of invasive Coconut Rugose spiralling whitefly in Tamil Nadu(2017-12) Ramjegathesh, R.; Venkatesan, K.; Srinivasan, T.; Rajamanickam, K.Item Effect of Ferrolure + In the Management of Red Palm Weevil (Rhynochoporus Ferrungineus F.) Infesting Coconut(2002) Rajamanickam, K.; Ramaraju, K.; Packiaraj, D.; Hameed Khan, H.; SubaharanEvaluation of Ferrolure pheromone trap in combination with food baits consisting of 1 kg of sugarcane molasses + 5 grams of yeast + 5 ml of glacial acetic acid + split petioles of coconut taken in a bucket of 10 lit. capacity was placed @ one traplha. During the first fortnight of trap installation, 49 weevils (32 females and 17 males) were trapped. There was a decline in the catch (1 weevil) after two months of trap installation due to reduction in active ingredient of the pheromone compound in the lure. On replacement of new sachets, the number of weevils trapped increased to 22 in sixth fortnight. The results indicate that the pheromone trap Ferrolure aid in monitoring and controlling the weevils in a ecofriendly manner.Item Efficacy of botanical formulations against coconut rhinoceros beetle, Oryctes rhinoceros.(2023) Alagar, M.; Srinivasan, T.; Rajamanickam, K.; Josephrajkumar, A.; Yasmin, A.; Chinnadurai. S; Sivakumar, V.; Praneetha, S.; Maheswarappa, H.P.Item Efficacy of low cost Pheromone Lure (Ferrugineol) against red palm weevil in coconut(2004-01) Rajamanickam, K.; Mayilvaganan, M.; Nair, C.P.R.Item Efficacy of low cost Pheromone Lure (Ferrugineol) against red palm weevil in coconut(The Andhra Agricultural Journal, 2004-01) Rajamanickam, K.; Mayilvaganan, M.; Nair, C.P.R.Item Efficacy of Selected Chemicals and Botanicals Against Coconut Rhinoceros Beetle Oryces Rhinoceros L.(2002) Rajamanickam, K.; Natarajan, C.; Packiaraj, D.; Hameed Khan, H.Studies were conducted at Coconut Research Station, (TNAU), Aliyarnagar d&ring 2000-2001 to find out the efficacy of selected chemicals and botanicals against coconut rhinoceros beetle in young coconut palms. The results revealed that placement of phorate 10G @ 5gm in two perforated sachets in two inner most leaf axils for 2 times at 6 months interval significantly reduced the leaf damage from 28.18 per cent to 210 percent at 12 months after treatment. This was followed by placement of 3 naphthalene balls in 3 perforated sachets and leaf axil filling of Neem seed kernel powder + sand @ 100 + 100 gm reduced the leaf damage upto 4.66 and 4.78 per cent respectively. Leaf axil filling of Sevidol 8G + sand @ 25 + 200gm and placement of carbofuran 3G @ lOgm in 2 perforated sachets were on par in reducing the leaf damage. Application of Lindane +1.3% dust, Endosulfan dust and Pungam seed powder proved to be the least effective in containing the leaf damage. Leaf axil filling of common salt + sand did not have any influence on reducing the leaf damage caused by rhinoceros beetle.Item Efficacy of Selected Chemicals and Botanicals Against Coconut Scale Aspidiotus Destructor and Mealybug Pseudococcus Cocotls(2002) Rajamanickam, K.; Packiaraj, D.; Hameed Khan, H.Studies were conducted at Agricultural Research Station, Aliyarnagar to find the efficacy of selected chemicals and botanicals against the coconut scale Aspidiotus destructor and mealybug Pseudococcus cocotis in young coconut palms. The results revealed that dimethoate @ 0.03% registered 95.00 percent mortality of scales followed by fish oil rosin soap @ 2.5% and monocrotophos @ 0.04 after 3 rounds of spraying. Phosphamidon 8 0.05% and Neem seed kernel extract @ 5%, Pungam oil @ 3%, were found to be less effective in controlling scales on coconut leaves. Similarly dimethoate @ 0.03% and monocrotophos 8 0.04% were found to be highly effective in checking the mealybug population followed by methyl demeton and fish oil rosin soap.Item Enjoying coconut free from insect pest infestation(2014) Chalapathi Rao, N.B.V.; Srinivasan, T.; Gurav, S.S.; Rajamanickam, K.; Maheswarappa, H.P.Item Evaluation of CPCRI red weevil pheromone lure in pollachi tract of Tamil Nadu(2006) Rajamanickam, K.; Mayilvaganan, M.; Nair, C.P.R.Item Evaluation of egg larval predator anthocorid bug Cardiastethus exiguus Poppius against Opinsina arenosella in Tamil Nadu(2013-12) Rajamanickam, K.; Johnson, I.; Subaharan, K.Item Intercropping of Pulses in Coconut(1992-01) Cristopher Lourduraj, A.; Geethalakshmi, V.; Rajamanickam, K.; Kennedy, F.J.S.; Myiswami, V.A field trial conducted during 1989 and 1990 in 40 year old coconut palms to evaluate the performance of different pulse crops as intercrops revealed that cowpea is the best suited and most remunerative intercrop and the next best being soybean and groundnut. However, intercropping in coconut with black gram and green-gram was not remunerative as they recorded poor yield.Item Invasion of the Rugose spiralling whitefly, Aleurodicus rugioperculatus Martin (Hemiptera: Aleyrodidae) in Pollachi tract of Tamil Nadu, India(2016) Srinivasan, T.; Saravanan, P.A.; Josephrajkumar, A.; Rajamanickam, K.; Sridharan, S.; P.M.M. David; Natarajan, N.; Shoba, N.Item Validation of integrated pest management strategy against coconut rhinoceros beetle, Oryctes rhinoceros L. (Scarabaeidae: Coleoptera)(2018-04) Srinivasan, T.; Rajamanickam, K.; Chandrika Mohan; Maheswarappa, H.P.