Research acheivements

Attention: open in a new window. PDFPrintE-mail

Article Index
Research acheivements
Agronomy
Soil Science
Plant Physiology
Entomology
Plant Pathology
Crop Improvement
crop production
crop protection
All Pages

Crop Protection

Entomology

 

  • Of   various   breeding   lines   and   germplasm accessions evaluated against hoppers, PTB 33, RP 2068, T12 and IC216750 were highly resistant to BPH, Nilaparvata lugens. The entries M O1, IC75864 and IC215298 were resistant to WBPH, Sogatella furcifera.
  • The back cross inbred line RP5588-B-B-B-63 developed   from   O.   glaberrima   recorded low damage for stem borer, Scirpophaga incertulas suggesting antibiosis as one of the mechanisms of resistance.
  • RP5588-B-B-B-32 derived from O.glaberrima and a BPT mutant been identified as a new source of resistance to Asian rice gall midge, Orseolia oryzae with nil damage under greenhouse.
  • Thirteen   Backcross   Inbred   Lines   (BILS) derived from a cross between Swarna (O.sativa)  and  a  wild  accession  O.  nivara – 81848, 11 mutant lines and 7 germplasm entries recorded low damage by leaf folder, Cnaphalocrocis medinalis.
  •  A newer insecticide BCS CL 73507 SC 200 was found effective in reducing the damage by stem borer, S. incertulas and leaf folder, C. medinalis in rice under field conditions.
  • Lemongrass,      eucalyptus,oregano      and camphor oils at 0.2% significantly reduced stem borer(S. incertulas) and leaf folder, C. medinalis  damage  and  their  efficacy  was comparable   with   insecticide   rynaxypyr.Olfactory response of BPH, N.lugens to various oils revealed that eucalyptus oil at 10µl and neem oil at 20 µl were highly repellent to female hoppers. In EAG test, highest reaction (repellent) by hispa, Dicladispa armigera was recorded in eucalyptus oil followed by camphor and rosemary oils.
  • The     mean     parasitisation     of     brown planthopper,  N.lugens  eggs  near  a  border of yellow marigold, orange marigold and Gaillardia was significantly higher when compared to parasitisation without flower border. Laboratory studies on biology of Anthocorid predator revealed that the bug was  predominantly  an  egg  predator  on BPH, N.lugens.
  • The pink stem borer (PSB), Sesamia inferens lure resulted in cumulative catches of PSB. Entomopathogenic       nematode       (EPN), Heterorhabditis      indica          significantly reduced white ear damage caused by the yellow   stem   borer   in   field   evaluation. An   indigenous    EPN,    isolate    Drr-Ma3 was identified as Metarhabditis amsactae based on morphological and molecular characterization.
  • Two genotypes (LD24 and Khao Pahk Maw) showed highly resistant reaction to rice root- knot nematode, Meloidogyne graminicola. Nematode analyses in SRI system revealed that the total nematode abundance was more in SRI compared to the normal transplanted system. 

  

Pathology 

 

 

  • The blast resistant genes like Pi1, Pi2 and Pi54 were introgressed into elite cultivar Samba Mahsuri and Introgressed lines are under evaluation for blast resistance.
  • Sheath  blight  tolerant  lines  viz.,  SM-801, Ngonolasha,        Wazuho   phek,   Gumdhan, BG-380-2, RP-2068-18-3-5, Phougak and Thangmoi        were identified   from   North Eastern India.
  • Among the cultivars evaluated under glass house conditions on three different sowing dates viz., early, mid and late for false smut disease, the genotype HKR 47 showed high number of smut balls (10 Nos.)
  • Isolated      microbial      antagonist’s      viz., Fluorescent Pseudomonas sp, Trichoderma viride,  Penicillium  sp.  and  Aspergillus  sp. and these were tested for their antagonistic activity   against   Rhizoctonia   solani   under in vitro conditions and found effective in suppressing the growth of the fungus.
  • Pyramiding of Xa21 and Xa38 in background of Samba Mahsuri and APMS6B is being carried out and lines are at BC4F1 (Samba Mahsuri) and BC3F1 (APMS6B).
  • Genotyping and phenotyping of BB isolate 392 Xoo strains have been completed and categorized into 22 pathotypes.
  • The      combination      fungicide      ICF-110 (tricyclazole 45% + hexaconazole 10% WG) 1.0g/l was identified as an effective molecule to reduce the blast and sheath blight disease of rice. 

 

Transfer of Technology

 

  • The   major   threats   to   sustainable   rice production         technologies   in   Chattisgarh plain  zone  as  perceived  by  farmers  are non     availability    of  resistant    varieties, poor  drainage,  nutrient  deficiency,  slow seed                   replacement,      labour      problems, non availability of micro nutrients and biofertilizers in time and increased cost of tubewells.
  • Gender    dimensions    study    in    farmers indicated that the major work related to agriculture was predominantly decided by male members of the family. Regarding the climate change they perceived that in Ranga Reddy district 2013 was a good year for rice cultivation, followed by 2014 as average and 2015 as a bad year in which rice area was reduced by 40 % and 75 %, respectively.
  • The  video  extension  module  studies  in Telangana and Rice check programme studies  in  Tamil  Nadu  indicated  that  in both these provinces, impact of knowledge interventions was found to be significant when blended with field demonstrations.
  • Adequate   training   in   the   agribusiness related area, effective marketing strategies, extension efforts    such    as    technology demonstration and dissemination strategies, value addition initiatives were the critical success        factors    in    the    public-private partnership in agricultural extension and advisory services.
  • The baseline study in village Ankushapur District Karimnagar revealed that though farmers  are  aware  of  IPM  as  a  concept, they are not aware of the important IPM components to be followed in rice.