Crop Protection : Integrated Pest Management - Red Gram

By TamilNadu Agricultural University on 24 Sep 2016 | read
    045

Monitoring for Pest & Disease

  • Under take survey at every 10 km distance initially at weekly intervals and there after at 10 days intervals.
  • Record incidence of pod borer on all host crops of the locality.
  • Field scouting for pests and bio control fauna by extension agencies and farmers once in 7 days should be undertaken to workout ETL.
  • Two hours light exposure up to 8-8.30 p.m. for pest monitoring through light trap should be undertaken in the field if possible.
  • Install pheromone traps at a distance of 50 m @ 5 traps/ha.
  • Use helicoverpa lure and change it after every 20 days. Trapped should be removed daily.

Pre-sowing stage 

  • Apply FYM or neem cake.
  • Synchronise sowing with a single variety in a village/area
  • Inter crop with sorghum for reducing Helicoverpa, wilt and nematode incidence.
  • Early planting (mid-June) in NWPZ for avoiding peak infestation period of  H. armigera on short duration pigeonpea.
  • Resistant/tolerant varieties.
  • Cultivating early maturing varieties.
  • Planting of castor or tall sorgham/maizc varieties on borders for conserving natural enemies. These plants also function as live perches for predatory birds.
  • Plant short stature crop like cowpea, mungbean, urdbean, fodder soybean etc. in 1 m wide band after 8-10 rows of pigeanpea.

Sowing stage

  • During visual observation, if wilt and blight incidence is above 20%, the field may be considered as sick and growing pigeon pea should be discouraged there.
  • Growing trap crop like marigold on the borders and in between rows as inter crop Their flowers shall attract oviposition which can then be plucked and disposed.
  • Ridge Planting + cover crops like soybean or cowpea.
  • Treatment of the seed with Trichoderma viride @ 4 grams/kg seed.
  • Seed treatment with carbendazim + thiram* ( I gm + 2 gm/kg seed, or carbendazim (2 gm/kg seed) or thirarn (3 gm/kg seed).
  • Seed treatment with metalaxy1 for phytopthora blight.
  • Soil treatment with carbofuran granule @ 8 kg a.i./ha at planting or seed treatment.

Vegetative stage 

  • Inter-culture and hand weeding for keeping the crop, weed free for 6-8 weeks.
  • Hand picking, jarring on cloth or in bags is effective in a limited way in small areas.
  • Conservation of predatory spiders and wasps etc.
  • Installation of bird perches for the predatory birds.

Flowering stage

  • Removal and destruction of sterility mosaic affected plants.
  • Hand picking and jarring on cloth or in bags is effective in a limited way in small areas.
  • Conservation of predatory spiders and wasps etc.
  • Installation of bird perches for the predatory birds.
  • Application of NPV @ 250 LE per ha. on noticing eggs and 1st  instars larvae (2-3 eggs or 1 larva per twigs).
  • B.t Spray@ O.O7-1.0 kg/ha
  • Spray of NSKE 5% at pre-flowering stage 3 times at 15 days interval.
  • Spraying of 0.07% endsulfan (2m1 of35 EC/lit of water) or 0.04% monocrotophos (1 ml of 36 SL/litre of water) or chlorpyriphos 20 EC @ 3.5 ml./1it. of water at 600-1000 lit of spray material per ha. with hand sprayer or 200-300 lit./ha with power sprayer.

Fruiting stage

  • HANPV @ 250 LE per ha. on noticing eggs and 1st  instars larvae (2-3 eggs or 1 larvae/5 twigs)
  • Spraying the crop with 0.04% mmocrotophos or chlorpyriphos 20 EC 3.5 ml/1it. of water or only one time fenvelrate 75 gm a. i./ha. in 600 to 1000 of spray liquid per ha.

Storage

  • Make harvest at the correct maturity time
 

Comments