Entomology 

 

 


SCIENTIST:

  1.   Debojit Das, Scientist D

 MANDATES:

     Generation of information regarding mulberry and silkworm pests.

     Implementation of the projects related to management of pests of mulberry and silkworm.

     Monitoring of incidence of pests of mulberry and silkworm.

     Generation of database on pest incidence.

     Providing consultancy for management of pests to the Department of Sericulture and National Silkworm Seed Organization.

     Providing faculty support to different structured & non-structured courses of the Training division.    

     Imparting training to the field functionaries for management of pests.

     Large scale awareness campaign and field demonstration of insect pest management technologies. 

ACHIEVEMENTS:      

Mulberry Pests 

         Life cycle of Pink mealy bug, Maconellicoccus hirsutus was studied.

         Tukra incidence pattern in various ecozones was recorded.

         Life cycle of whitefly, Dialeuropora decempuncta was studied

        Leaf yield loss was determined due to infestation of major mulberry pests like Thrips, Mealy bug and Whitefly.

         Economic Threshold Level for Thrips / Mealy bug / Whitefly was determined.

         Recommended control measures for management of Thrips / Mealy bug / Whitefly.

         Forewarning calendar for major mulberry pests for three traditional districts of west Bengal was prepared.

         Hot spot zones for whitefly infestation were identified in three traditional districts of West Bengal.

Silkworm Pest

         Life cycle and biology of Uzi fly was studied.

         Survey and surveillance of Uzi fly was done.

         Uzi fly control was done with chemosterilant.

         Extent of crop loss due to Uzi fly infestation was determined.

         Forewarning Calendar for Uzi fly incidence pattern in traditional districts of West Bengal was prepared.

         Mechanical and chemical control measures were recommended for management of Uzi fly.

RESOURCES:              

1.      Stereoscopic Microscope (Leitz)

2.      Centrifuge (Remi T 24)

3.      Illuminated magnifying glass (Swivel Lens 10 X 4x)

4.      Electronic balance (Anamed

ONGOING PROJECTS:

1.      PRE-3345: Development of weather based forewarning system for mulberry pests. (2005 2010) Extended up to 2015.

2.      ARE-3464: Biology and feeding efficacy studies of Scymnus pallidicolli (Mulsant) for the eco-friendly management of pink mealy bug, Maconellicoccus hirsutus (Green). (2011 2013)

PROGRAMME:

1.      BPR(VP)-006: Studies on the field efficacy of selected does of insecticide in whitefly management. (2011 2013)

Validation Programme:

1.    Field evaluation of botanical insecticides for management of major mulberry pests and their impact on leaf yield (2008 10).

  CONCLUDED PROJECTS:

PRE- 001 : Control of mulberry pests for thrips and mealy bug

      Highlights :

       Determined leaf yield loss due to major mulberry pests like Thrips and Mealy bug.

       Determined Economic Threshold Level of Thrips and Mealy bug .

       Recommended control measures for management of Thrips and Mealy bug.

       Forewarning calendar for Thrips and mealy bug for three traditional districts of West Bengal was prepared.

      ARE- 001 : Life table and population dynamics of Uzi fly on its primary host, Bombyx mori .

   Highlights :

      Extent of crop loss due to Uzi infestation was determined.

       Seasonal incidence of Uzi fly was recorded.

       Forewarning calendar for Uzi fly was prepared.

      ARE- 002: Control of Uzi fly.

   Highlights:

      Mechanical and chemical control measures for Uzi fly were developed.

      PRE- 3155: Studies on whitefly and its management

   Highlights:  

   Incidence of whitefly population was studied along with abiotic factors, secondary hosts and natural enemies.

   Forewarning calendar for whitefly for three traditional districts of West Bengal was prepared.

   Crop loss due to whitefly infestation was estimated.

   Economic Threshold Level of whitefly was determined.

   Control measures through mechanical, botanical / chemical and biological means for management of whitefly were recommended.

BHRTEMP 0002: Screening and short listing of plant extracts for their insecticidal effect.

     Highlights:

Crude extracts from three locally available plants were short listed for insecticidal properties against mulberry pests.

PRE 3311: Efficacy of Botanical insecticides for management of major mulberry pests and their bio-safety to silkworm and natural enemies.

     Highlights:

      For control of thrips 1.0% Nicotine ex, 2.0% Pongamia oil and 2.0% Neem oil, for mealy bug 1.5% Pongamia oil, 2.0% Neem oil & 2.0% Nicotine ex. & for whitefly 1.0% Neem oil, 1.0% Nicotine ex. & 1.0% (Pongamia oil + Neem oil 1:5) were found effective in suppression.

      Of the treatments found effective 1.5% Pongamia oil, 2.0% Pongamia, 1.0% Nicotine ex, 2.0% Nicotine ex, & 1.0% (Pongamia oil + Neem oil 1:5) have no impact on survival and economic characters and are on par with the control.

      Botanical insecticides were found to be safe to the native predators.

PRE-3394: Studies on the efficacy of some insecticides for management of whitefly and their bio-safety to silkworm, Bombyx mori (2007-2010).

     Highlights:

      Effective concentration of a new chemical insecticide, thiamethoxam (0.015%)  was identified for the management of whitefly (Safe period : 14 days) with a benefit cost ratio 2.74: 1. 

      This technology is being validated at 25 (nos.) farmers fields spread over three traditional districts of West Bengal during 2011-2013.