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Fisheries

PESTS OF IMPORTANT CROPS : Pest of Jowar

Name of Pests

Nature of damage

Control Measures

Shoot fly
Atherigona soccata
  • Damage caused during the
    early seedling stage,
  • larvae cut the growing points,
    causing dead-hearts;
  • tillers do develop after
    the central shoot is killed
    but the yield from these
    tillers is rather poor;
  • commoner in early–sown
    rabi or late-sown kharif crops
  • Adjust the sowing date,
  • increase the seed-rate,
  • uproot and destroy infested seedlings;
  • treat the seed material with Carbofuron (20:1) ;
  • or apply 3% Carbofuran, 5% Disulfoton or 10% Phorate granules
Stem borers; Chilo
zonellus
(par-
tellus)
  • moth, dirty brownish, nocturnal,
  • caterpillars feed on foliage
    and bore into the stems, causing dead-hearts;
  • also tunnel the stem and
    bore into earheads.
  • Plough and destroy all the stubble after harvest;
  • apply 4% Endosulfan or carbaryl granules or spray 0.05% Lindane
Sorghum midge,
Contarinia sorg-
hicola
  • The insect has assumed the
    status of a serious pest
    recently;
  • cosmopolitan;
  • the tiny pinkish fly lays eggs
    inside the glumes and the
    larvae feed on the ovaries,
    thus preventing seed formation
  • Burn the panicle residue and chaff obtained after the threshing of grain to destroy the dispausing larvae;
  • adopt a uniform date of sowing, and preferably grow only one variety;
  • apply 0.05% Endosulfan, 01% Carbaryl or 0.05% Lindane sprays or dusts
Aphids:
Rhopal-
osiphum
maidis
  • Nymphs and adults suck the sap from the leaves and shoots, exude honeydew, on which a sooty mould grows, giving the leaves a black appearance and interfering with photosynthesis.
  • Spray 0.02% Phosphamidon, 0.04% Diazinon Methyl-demeton or Dimethoate
Deccan wingless
Grass-
hopper,
Colemonia sphena-
roides
  • Eggs are laid in the soil 75-200 mm deep;
  • Hoppers and adults feed on foliage, at times causing severe defoliation of the crop;
  • Destroy eggs in the soil by deep ploughing soon after harvest;
  • dust hoppers and adults with 5 and 10% BHC, respectively.
Earhead bug,
Calocoris angus-
tatus
  • Nymphs and adult bugs suck the sap from tender grains at the milky stage, making them chaffy ;
  • commoner in southern India
  • Dust the maturing earheads with 5% BHC or 4% Carbaryl,
  • spray 0.1% Carbaryl (W.P)
Sorghum shoot bug,
Peregrinus maidis
  • Nymphs and adult bugs suck the sap from the leaves and whorls which turn pale green.
  • also reported as a virus vector
  • Spray 0.03% Phosphamidon Dimethoate Diazinon, Monocrotophos or Methyl demeton
Cut
worms

Agrotis ipsilon
  • Caterpillars are generally feeders;
  • cut seedlings at the soil level ;
  • resowing may be necessary, when the attack is severe
  • Dust 10% BHC on the soil around the plants
Hairy caterpillars :

Amsacta moorei

  • General feeders,frequently causing severe defoliation;
  • Dust 10% BHC;
  • Undertake organized campaigns against the early-stage caterpillars
Earhead cater-
pillars :Eub-
lemma silicula
  • Occur throughout the country;
  • caterpillars feed on maturing grains
  • Dust the maturing earheads with 5% BHC or 4% Carbaryl, or spray 0.1% Carbaryl (W.P)
Mites:
Oligon-
ychus indicus
  • Colonies of nymphs and adults suck the sap from the undersurface of the leaves, causing reddish brown spots and patches
  • Dust sulphur or spray 0.05% wettable sulphur