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Thapa, R. S.
- Insect Borers Killing Fire-scorched Chir Pine Trees and Their Control in Nahan Forest Division, Himachal Pradesh
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Indian Forester, Vol 116, No 5 (1990), Pagination: 375-380Abstract
In Jamta Range in Nahan Forest Division, Himachal Pradesh a wide-spread fire broke nut in April-May, 1984 and number of chir pine trees slowly started dying one after the other even after 10 months of outbreak of fire. These trees Were being trapped for resin for many years by lip-and-cup method making deep and wide blazes leaving only narrow bark strips between two adjacent blazes. The study showed that the scorched bark-strips around the blazed area attracted two flat-headed borers, one the bark borer, Melanophilo ignicola and another the sap wood borer, Sphenoptera aterrima which badly damaged the bark and formed a girdle around the tree trunks resulting in slow death or trees Treatment with 1% lindane water emulsion around the tapped area was found very effective in protecting the trees from borers' attack and there by preventing their mortality.
- Defoliation Epidemic of Ascotis selenaria Imparata Walk. (Lepidoptera: Geometridae) in Sal forest of Asarori Range, West Dehra Dun Division
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Indian Forester, Vol 114, No 5 (1988), Pagination: 269-274Abstract
An defoliation epidemic by Ascotis selenaria imparata (Lepidoptera : Geometridae) started in the Sal forests of Mohammadpur Block of Asarori Range, West Dehra Dun Division in early 1975. Compartments 4, 5 and 6 were affected. In compartments 4 and 5 complete defoliation of Sal trees occurred whereas in compartment 6 trees were partially defoliated. In the understorey, trees of Mallotus philippinensis and Murraya koenigii were also badly defoliated. Two generations of the defoliator were completed by June-July, 1975 and a third generation started in the month of July. However the third generation larvae got completely annihilated by the infection of a nuclear polyhedrosis virus and the epidemic came to an abrupt end. Observations on the biology and natural enemy complex of the pest and the resultant impact of defoliation epidemic on Sal trees have been made. Control measures using insecticides and pathogens have also been suggested.- Large-scale Mortality of Deodar Trees by the Bark Borer, Scolytus major Stebbing (scolytidae, Coleoptera), in Kulu forest Division, Himachal Pradesh
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Indian Forester, Vol 112, No 5 (1986), Pagination: 392-398Abstract
Deodar forest of Kulu Forest Division have often been the scene of bark borer, Scolytus major Stebbing, outbreaks in the past. The recent outbreak occurred in August 1980 in Jari Ban forests of Parbatti Range which killed several trees. A study of borer damage was made in September 1980 on the incidence of attack and the factors responsible for pupulation build-up of the bark borer. Preventive and remedial control measures have been given. It is suggested that proper maintenance of forest sanitation and management practices in deodar forests may avert bark borer outbreak.- Biology, Ecology and Control of Kadam Defoliator Arthroschista hilaralis Walk. (Pyralidae, Lepidoptera) in Plantations in West Bengal
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Indian Forester, Vol 102, No 6 (1976), Pagination: 388-401Abstract
Large-scale plantations or kadam raised by the West Bengal. Forest Department during 1962-69, in their young stage, suffered severe defoliation damage from Artkroschista hiloralis. Ecological studies of this defoliator were made in a field insectary at Chilapata, Cooch-Behar Division (West Bengal) from August to November 1971 as well as at Dehra Dun (Uttar Pradesh) during 1970-71. The defoliator has a life-cycle of 21-26 days, completing 11-12 generations in a year. Pest population begins to build up to epidemic proportion after a good amount of rains during July-August. By September the pest population reaches its peak and by 1st week of October it begins to decline. The main contributing factor of population decline is the want of high humidity supported by heavy parasitism (ca 60%) by Apanteles balleatea. Severe defoliation retards growth of young plants (2-5 year old) and repeated defoliation results in stunted growth Two parasites, A. baltealea and Cedria paradoxa, are promising agents to check the pest population increase. For the control of epidemic, mass- breeding and reiease of these two parasites (biological control) and encouragement or introduction of plants that support the collateral hosts of defoliator's parasites in or around plantations have been recommended (cultural control). If these two measures prove inaadequate treatment with 0.1% thiodan (a selective killer) or 0.1% dieldrin or chlordane water emulsion may be resorted to (chemical control).- Experiments on the Effect of Kiln-seasoning of Planks from Three Species of Timber (Terminalia belerica, Terminalia tomentosa and Eugenia jambolana) as a Protection Against Insect Borers
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Indian Forester, Vol 82, No 9 (1956), Pagination: 455-468Abstract
No abstract- A New Genus of Nasutitermitinae from India (Isoptera termitidae)
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Indian Forester, Vol 88, No 1 (1962), Pagination: 49-52Abstract
No abstract- Microcapritermes Gen. N. from India (Isoptera:Termitidae:Termltinae)
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Indian Forester, Vol 88, No 5 (1962), Pagination: 370-375Abstract
No abstract- A New Species of the Genus Grallatotermes from India (Isoptera: Termitidae: Nasutitermitinae)
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Indian Forester, Vol 90, No 4 (1964), Pagination: 210-214- Speculitermes chadaensis sp.N. from India (Isoptera: Termitidae: Amitermitinae)
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Indian Forester, Vol 90, No 8 (1964), Pagination: 514-516Abstract
No abstract- Insect Pests of Fast Growing Tree Species-I. Preliminary Investigation on Poplar Stem and Root Borer, Apriona cinerea Chevrolat (Coleoptera : Lamiidae) in New Forest
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Indian Forester, Vol 90, No 10 (1964), Pagination: 681-687Abstract
A preliminary account of poplar stem and ischolar_main borer, Apriona cinerea and its control measures are given.- Recent Epidemic of Sal Borer, Hoplocerambyx spinicornis Newm. In South Mandla Division, Madhya Pradesh and Recommendations for Control
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Indian Forester, Vol 90, No 11 (1964), Pagination: 777-781Abstract
The sal borer, Hoplocerambyx spinicornis Newm., is endemic in South Mandla Forest Division, Madhya Pradesh. Recently, in June, 1963 serious epidemic was reported by the Chief Conservator of Forests, M.P., to the President, Forest Research Institute to suggest some suitable control measures. An entomological party was sent by the President to get a first hand knowledge of epidemic and conditions prevailing there. An account of party's survey and work on trap-tree operation during 20th-27th June, 1963 along with recommendations for the control of Hoplo are given in this paper.- Sal Regeneration: the Problem of Sal Seed and Seedling Borer Pammene theristis Meyrick in Dehra Dun Sal Forests (Lepidoptera: Eucosmidae)
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Indian Forester, Vol 96, No 8 (1970), Pagination: 580-586Abstract
An account of Bionomics of sal seed and seedling borer Pammene theristis Meyrick in Dehra Dun sal forests has been given in the paper.- Short Note on Sal Heartwood Borer, Hoplocerambyx spinicornis Newn. (Cerambycidae) Epidemic in the Thano Sal Forests Dehra Dun Division
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