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$WI LD R LATI\IES CROP PLANTS IN INDIA$

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170 Shamsher <strong>Singh</strong> and R.K. KhetarpalDouble stranded RNA (ds RNA) analysis is a rapid tool thatcan supplement the information obtained from. bio-assays. Analysisof dsRNA is based on the isolation of disease specific dsRNAs fromvirus infected tissues and their electrophoretic separation on a gel,which is then stained and viewed. However, the presence of nonviraldsRNAs in healthy plants and the apparent absence of dsRNA profile in some viruses, may result in false negatives or falsepositives. Negative dsRNA tests should be confirmed by othermethods before plant material is indexed as virus free.
IISymptoms of Insect Damage in CropsShashi BhallaIntroductionThe struggle between wan and insects began long before thedawn of civilization. I.nse_S~s are most numerous m~mbers ofanimal kingdom, which is attributed to their s;naU size, widea£laptab.ility and s!lperior body structure. About lQI.QQO of the640,000 species of insects are injurious to plants and of these about-?Q9pm be considered as 1!);ajor pests in India. Annual losses dueto insect pests have been estimated to about p per cent. No otherclass of animals is so intimately involved in the intric~cies andcomplexities of the biological world as are insec;ts.Extent of insect injuryInsects have been found associated with all the plant partsi.e. leaves, flowers, fruits, buds, seeds, bark, wood and roots. Infact,~;o pla;},t part is free from their damage. Nearly all the injurydone by insects results directly or indirectly from their attempt tosecure food. ¥any insE;!cts are physically observed on the _Rlantsbut q_the!s are I10ctumal in their :v.£lbit and they .J:rlde under ~oilclods, fallen leaves or bark crevices during the day time. Thoughthey may not be visible during the day time, they causeconsiderable damage to the crops.An insect or a group of insects produces specific symptomsof damage by ~egtng or o_vipositing activities. Therefore, it isessential for a pJa.p...! l:>r~~der or ,plant explorer to be acquainted with
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This publication has been brought o
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Page14. Genebank Management System
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CONTRIBUTORS(Number in parentheses
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IIConservation of Plant Genetic Res
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Conservation of Plant Genetic Resou
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Centres of Origin and Diversity of
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Need For Exchange of Plant Genetic
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Need For Exchange of Plant Genetic
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Principles of Plant Introduction an
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Principles of Plant Introduction an
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Principles and Concepts of Plant Qu
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Plant Quarnatine Regulations and th
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Medium and Long-term Storage of See
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IIPromising Introductions and Prior
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Promising Introductions and Priorti
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Promising Introductions and Priorti
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Use of Tissue Culture Techniques in
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LIse of Tissue Culture Techniques i
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Promising Introductions in Horticul
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Promising Introductions and Priorit
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Priorities for Promising Introducti
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Priorities for Promising Plant Intr
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Promising introductions and Priorit
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IIGenebank Management System (GMS)
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Genebank Management System (GMS) so
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Page 141 and 142: IISymptoms of Fungal and Bacterial
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Page 165 and 166: Symptoms Cause,d by Plant VirusesD.
Page 167 and 168: Symptoms Caused by Plant Viruses 16
Page 169 and 170: Symptoms Caused by Plant Vinlses 16
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Page 179 and 180: Symptoms of Insect Damage in Crops
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Page 209 and 210: Symptoms of Nematode Damage 203adve
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Page 215 and 216: Detection Techniques for Plant Para
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Page 223 and 224: Treatment Schedules for Eradication
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Treatment Schedules for Eradication
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Treatment Schedules jar Eradication
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Plant Genetic Resources activities
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IIIntellectual Property Rights: Pro
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Intellectual J:roperty Rights,' Pro
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Intellectual Property Rights : Prot
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Intellectual Property Rights : Prot
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The Indian National Gene Bank 243sp
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The Indian National Gene Bank 245In
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The Indian National Gene Bank' 247c
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LIST OF PARTICIPANTS OF TRAINING CO
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BP Singh

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