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Grass hopper

Symptom of Damage :

  • Irregular feeding on seedlings and leaf blade

  • Large portions of leaf edges consumed.

  • Cutting of stem at panicle stage.

  • Completely defoliate the plants leaving only the mid ribs.

  • Presence of nymphs and adults feeding on paddy foliage.
Irregular feeding on leaves Leaves are defoliated from the margin or tip irregularly

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Identification of pest :
              Scientific Name - Pelopidas mathias
  • Egg :
    The eggs are laid in batches of 30-40, hatch only in June to July on receipt of the monsoon rains. Eggs are yellowish and covered with gummy substrate that hardens into a waterproof coating.

  • Nymph :
    The nymphs feed on the grasses and paddy crop.

  • Adult :
    They grow into adults by August to September. Hieroglyphus banian (Large Grasshopper) measures about 1 ½ inch long. There are three transverse dark lines on the prothorax, which is helpful for identifying the pest. Oxya nitidula (Small grasshopper) is about one inch long and has a longitudinal brown streak on either side of the thorax.
Grass hopper Grass hopper
 

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Management Strategies:

Cultural Methods:


  • Flooding the stubbles, trimming the bunds, sweeping along the bunds and adult grass hoppers can be picked directly from the foliage at night because they are sluggish.

  • Expose the eggs to be picked up by birds after ploughing and trim the bunds.
Allow ducks into the field Flood the nursery


Chemical Methods:


  • Dusting the crop with 5-10% methyl parathion 2% @ 25-30 kg/ha.

  • Dusting malathion 5% @ 20 kg/ha.

  • Foliar sprays of insecticides can also control grasshoppers.
Malathion dust


Biological Methods:


  • Scelionid wasps parasitize the eggs of short-horned grasshopper. A platystomatid fly and mite prey on the eggs of oriental migratory locust.

  • Different species of ants feed on the nymphs and adults.

  • They are also prey to birds, bats, field rats, mice, wild pigs, dogs, millipedes, fish, amphibia, reptiles and monkeys.
Egg parasitoid - Telenomus remus Parasitic larva emerging from armyworm
 
Pupal parasitoid-Netelia sp.  
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