Research acheivements

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Research acheivements
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Entomology  

 

  • Pest  surveys  undertaken  at  29  locations revealed reports of outbreaks of BPH from Sakoli,Rajendranagar    and    Pantnagar. Caseworm damage to entire crop was observed at Sakoli, Moncompu and Karjat. Outbreak of army worm, Mythimna separata was reported at Khudwani.
  • Host plant resistance studies comprised of 1832  entries  evaluated  against   12   insect pests  in  201  valid  tests  (47  greenhouse reactions+154 field reactions). The results of these  reactions identified  52  entries (2.8% of the tested) as promising against various insect pests. Of these 6 entries (11.5%) were under retesting.
  • Insecticide Evaluation Trial (IET) carried out at 34 locations revealed that the performance of flubendiamide plus thiacloprid @ 120 g a.i./ha was at par with the standard check insecticide  rynaxypyr  against  stem  borer and  leaf  folder,  while  against  gall  midge all  the  treatments  were  at  par.  DPX-RAB 55  @  25  g  a.i./ha  followed  by  standard check dinotefuran were effective against planthoppers and leafhoppers.
  • Botanical     Insecticide     Evaluation     Trial (BIET) carried out at 24 locations revealed that Neemazal and Nimbecidine were found effective against stem borer. Against sucking pests-BPH,  WBPH  and  GLH,  botanicals were moderately effective. The botanical treatments were relatively safer to BPH predator-mirid bug than spiders.
  • In the trial on Effect of Planting Dates on Insect Pest incidence (EPDP) conducted at 20 locations pest incidence was moderate to severe across locations and relatively high in late planting.
  • Monitoring of species composition of stem borer revealed the presence of four species distributed   over   15   locations   with   YSB being dominant in 12 locations. Tetrastichus schoenobii was the dominant egg parasitoid followed by Trichogramma and Telenomus sp. Anagrus, Oligosita and Gonatocerus were the parasitoids reported on hopper eggs.
  • Ecological Engineering for Pest Management (EEPM) taken up in four locations showed that combination of organic manuring, alleyways, spacing and water management and growing of flowering plants on bunds increased  the  natural  enemy  populations like mirids, spiders and coccinellids and increased egg parasitisation.
  • Bio intensive pest management trial (BIPM) initiated in four locations showed that the pest incidence was either reduced in (BIPM) or on par compared to Farmers’ practice. There was also an increase in natural enemy population in the BIPM plots.
  • Yield Loss Estimation Trial (YLET) carried out at 7 locations revealed a significant negative   relationship   between   per   cent white  ears  due  to  stem  borer  and  grain yield. Pooled analysis showed that for every 10% increase in white ears there was 3.09 g reduction in grain yield per hill.
  • Integrated Pest Management special (IPMs) conducted at 10 locations revealed that adoption of IPM practices reduced the incidence  of  gall  midge,  BPH  and  stem borer damage at respective centers. IPM practices also reduced the severity of major rice diseases. Weed population and weed biomass  were  also considerably  reduced. Due to reduced pest incidence, grain yield was significantly high in IPM plots resulting in higher BC ratios.
  • Population dynamics of major insect pests assessed through light trap at 30 centers indicated that yellow stem borer and planthoppers continued to be major pests.