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Kulkarni, N.
- Evaluation of Trichogramma Spp. to Minimise the Attack of Teak Leaf Skeletonizer
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Indian Forester, Vol 133, No 4 (2007), Pagination: 527-533Abstract
For evolving an eco-friendy, non-toxic and practically feasible method of minimizing the populataion of the most serious Teak leaf skeletonizer E. machaeralis, four egg parasitoids viz. Trichogramma brsiliensis, T. chilonis, T. pretiosum and T. japonicum were tested in laboratory conditions. T. brasiliensis proved a better potential species to parasitise maximum number of eggs in labortory i.e. 58 to 61 per cent. Further evaluation of T. brasiliensis in field conditions for their least effective dose, proved that the optimum dose of the egg parasitoid T. brasiliensis is 1.25 lakhs wasps/ha to minimize the attack of teak leaf skeletnizer, E. machaeralis.
- Influence of Weather Factors on the Incidence of Sissoo Defoliator, Plecoptera reflexa Guenee on Dalbergia sissoo Seedlings
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Indian Forester, Vol 133, No 1 (2007), Pagination: 108-114Abstract
The activity of P. reflexa initiated in 25th SMW with 2.62 per cent incidence and 1.74 mean larval population in 1999-2000. It reached to its peak in the SMW 33rd with the incidence and mean larval population being, respectively, 27.78 per cent and 17.18. It remained active till 43rd SMW. During 2000-01, activity of this pest initiated in 25th SMW with 1.68 per cent incidence and 0.99 mean larval population. It reached to its peak in the SMW 33rd with the incidence being 32.85 per cent with 26.21 mean larvae per quadrate. It remained active till 43rd SMW. The correlation coefficient of the incidence and population vs maximum temperature of the corresponding period showed significant negative correlation. During both the years mean value of the correlation coefficient of maximum temperature, respectively for incidence and population was calculated to be -0.5944 and -0.6113. The data indicated that the correlation of incidence and population with that of relative humidity was also significantly positive.- Relative Efficacy of Newer Insecticides against Leaf Roller, Crypsipyta coclesalis Walker on Bamboo Seedlings
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Indian Forester, Vol 132, No 2 (2006), Pagination: 245-247Abstract
No abstract- Sal Heartwood Borer in Madhya Pradesh
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Indian Forester, Vol 132, No 7 (2006), Pagination: 799-808Abstract
Shorea robusta, which is one of the most important timber species of India, yields about 2.5lakh m3 of timber and 3lakh m3 of firewood. A heartwood borer, Hoplocerambyx spinicornis, often damages it. Its beetles emerge soon after a few showers of monsoon rains from the third week of June to the end of August. They attract to the odour of freshly cut bast and sapwood of sal. Soon after mating, the beetle oviposit white, cream coloured eggs in cracks on the bark. After 3-7 days of egg period, the hatching takes place. The freshly hatched grubs bore the bark and reach to the sapwood, where they form tunnels. After feeding the sapwood, the grub move to heartwood where they form a wider pupal chamber, the grubs start pupation from December onwards, develop to immature beetles between April to May and emerge out from middle June onwards during monsoon. The male has long antennae than their body while the female has short antennae. The incidence of attacked sal trees due to heartwood borer lasts upto 24.33 per cent during epidemics. Continuous favourable climatic conditions, vicinity of human and herbivore population, physiological properties of sal trees to insect borer, quantitative and qualitative changes in host trees, natural enemies of sal borer and weaken of defensive system of sal trees are recorded as probable factors responsible for sal borer epidemics. Borer killed more than 26lakhs of sal trees during recent sal borer epidemics between 1996-02. Felling of these attacked sal trees in dense sal forests opened the canopy and resulted an average regeneration upto 4.18 saplings per square meter of sal and other miscellaneous species as compared to 1.95 saplings per square meter in unfilled sal areas. In human inhabitant areas however, it is reported to be comparatively low. Besides existing preventive and remedial control measures, the authors have advocated spraying of 0.05% endosulfan 3.5 ml insecticide per litre of water of 0.05 per cent chlorpyriphos (10 ml insecticide/litre) on stored borer attacked sal stacks and then covering them with polythene sheets before monsoon in June to kill the beetles emerging from sal logs. Further research need on sal heartwood borer, its out break and management are also mentioned.- Record of Hypena tenebralis (Lepidoptera: Noctuidae) as a New Pest of Albizia procera
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Indian Forester, Vol 123, No 2 (1997), Pagination: 180-180Abstract
No abstract- First Report of Ascotis selenaria imparata Walk. (Lepidopter: Geometridae) as a Pest of Moringa pterigosperma Gertn.
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Indian Forester, Vol 122, No 11 (1996), Pagination: 1075-1076Abstract
No abstract- A New Report of Ascotis selenariaimparata Walk. (lepidoptera: Geometridae) as a Pest of Pongamia pinnata (l.) Pierre
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Indian Forester, Vol 121, No 3 (1995), Pagination: 239-240Abstract
No abstract- First Report of Spodoptera litura (Fab.) Boursin (Lepidoptera : Noctuidae) as a pest on Butea monosperma (Lam) Taub
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