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Crop Protection

Crop Protection
25
Jul

Nature of Damage of Rice thrips

Nature of Damage of Rice thrips

1. Both the nymphs and adults suck the sap from leaves. As a result of pest attack, initially yellowish streaks appear on the leaves.

2. Later, the leaves curl longitudinally from the margins inwards leading to sharply pointed leaf tips resembling that of needles, which finally wither.

File Courtesy: 
Integrated Pest management in Rice, Technical bulletin No. 15, DRR, Rajendranagar, Hyderabad
Photo Courtesy: 
CRRI
25
Jul

Bio ecology of Rice thrips

Bio ecology of Rice thrips

Egg: Eggs laid singly in the tissues of the tender leaves on the sides facing the stem. Eggs are hyaline and turn pale yellow as they mature.

Nymph: Newly hatched nymphs are transparent but turn yellowish white after the first moult and possess darker legs, head and antennae.

Pupa: Pupation takes place inside the rolled leaves and appendages and wings are clearly visible.

File Courtesy: 
Integrated Pest management in Rice, Technical bulletin No. 15, DRR, Rajendranagar, Hyderabad
25
Jul

Distribution of Rice thrips

Distribution of Rice thrips

The Rice thrips are distributed in upland Rice in

  • Orissa,
  • Andhra Pradesh,
  • Madhya Pradesh,
  • Punjab,
  • Haryana,
  • Assam,
  • TamilNadu,
  • Kerala,
  • Uttar Pradesh,
  • West Bengal
File Courtesy: 
Field management of insect pests of rice - A ready reckoner. Technical Bulletin No.46, Directorate of Rice Research, Rajendranagar
Photo Courtesy: 
CRRI
25
Jul

Taxonomy of Rice thrips

Taxonomy of Rice thrips

Class: Insecta

Order: Thysanoptera

Family : Thripidae

Genus : Stenchaetothrips

Species : biformis

File Courtesy: 
Field management of insect pests of rice - A ready reckoner. Technical Bulletin No.46, Directorate of Rice Research, Rajendranagar
Photo Courtesy: 
CRRI
25
Jul

Chemical Management of Rice Case Worm

Chemical Management of Rice Case Worm

Chemical control:

1. 10-12 DAS 1ml of methyl parathion 50EC or 0.5ml fenitrothion 100EC or 0.9ml diazinon 60EC or 1.3ml monocrotophos 36SL or 2ml chloropyriphos 20 EC or 1.5ml fenthoate 50EC or 2ml phasalone 35EC or 2ml endosalfon 35EC or 2ml quinolphos 25EC in 1 liter of water for spraying crop.

File Courtesy: 
Field management of insect pests of rice - A ready reckoner. Technical Bulletin No.46, Directorate of Rice Research, Rajendranagar
Photo Courtesy: 
CRRI
25
Jul

Biological Management of Rice Case Worm

Biological Management of Rice Case Worm

Biological Control:

1. Many predators including Spiders, dragonflies, Hydrophilid larvae and birds predate on larvae and adults.

2. Trichogramma minutum Ashmead is reported as a parasite of caseworm eggs.

3. A braconid wasp Dacnusa sp. and a tabanid fly Tabanus sp. parasitize the caseworm larvae.

File Courtesy: 
Insect Pests of Rice by M. D. Pathak and Z. R. Khan Sinu et.al., (2007) Biocontrol Science and Technology 17(10): 1037 -1045
Photo Courtesy: 
Sinu et.al., (2007) Biocontrol Science and Technology 17(10): 1037 -1045
25
Jul

Cultural Management of Rice Case Worm

Cultural Management of Rice Case Worm

Cultural practices:

1. Drain water from the field.

2. Keep kerosene soaked gunny bags in the field water and dislodge the leaf cases by passing rope or branches of thorny plant.

3. The use of correct fertilizer application, wider spacing (30 × 20 mm), and early planting.

File Courtesy: 
Field management of insect pests of rice - A ready reckoner. Technical Bulletin No.46, Directorate of Rice Research, Rajendranagar
Photo Courtesy: 
CRRI
25
Jul

Nature of damage of Rice Case worm

Nature of damage of Rice Case worm

1. The caterpillars feed on green tissues of the leaves and form tubular cases around them by cutting the apical portion of leaves, which float on water.

2. Several tubes are also seen ranging from the plants. In case of severe infestation plants are unable to grow.

3. They damage top of the leaves. The apical portion of cut leaves bear whitish papery areas since the chlorophyll is scrapped.

File Courtesy: 
Field management of insect pests of rice - A ready reckoner. Technical Bulletin No.46, Directorate of Rice Research, Rajendranagar
Photo Courtesy: 
CRRI
25
Jul

Host range of Rice Case Worm

Host range of Rice Case worm

Rice Case Worm also infests millet and various grasses such as

  • Panicum,
  • Eragrostis, and
  • Paspalurn
File Courtesy: 
Insect Pests of Rice by M. D. Pathak and Z. R. Khan
Photo Courtesy: 
Mr.Y.Kondal Rao (DRR)
25
Jul

Bio ecology of Rice Case Worm

Bio ecology of Rice Case Worm

1. This pest (Nymphula depunctalis Stagnalis) is commonly found in low land with poor drainage and flooded fields.

2. Because of continuous water stagnation in fields during floods, this pest can build up and cause severe loss in early vegetative stage.

File Courtesy: 
Integrated Pest management in Rice, Technical bulletin No. 15, DRR, Rajendranagar, Hyderabad
Photo Courtesy: 
CRRI
25
Jul

Distribution of Rice Case worm

Distribution of Rice Case worm 

  • It is a sporadic pest commonly found in lowland and flooded rice fields.
  • Some hot spots are parts of Orissa, Bihar and Assam
File Courtesy: 
Field management of insect pests of rice - A ready reckoner. Technical Bulletin No.46, Directorate of Rice Research, Rajendranagar
Photo Courtesy: 
CRRI
25
Jul

Taxonomy of Case worm

Taxonomy of Case worm

Class: Insecta

Order: Lepidoptera

Family : Pyralidae

Genus : Nymphula

Species : depunctalis

File Courtesy: 
Insect Pests of Rice by M. D. Pathak and Z. R. Khan
Photo Courtesy: 
CRRI
25
Jul

Management of White Grub

Management of White grub

  • The only practical insecticidal control measure against white grubs is the application of granular insecticides in crop furrows or hills at sowing.
File Courtesy: 
Insect Pests of Rice by M. D. Pathak and Z. R. Khan
Photo Courtesy: 
Mr.Y.Kondal Rao (DRR)
25
Jul

Nature and Symptoms of damage of White Grub

Nature and symptoms of damage of White grub

  • The presence of white grubs in the rice field is characterized by orange-yellow leaves and dead heart symptoms.
  • Roots with feeding damage caused by grubs can also be easily pulled out by hand.

 

 

 


File Courtesy: 
Field management of insect pests of rice - A ready reckoner. Technical Bulletin No.46, Directorate of Rice Research, Rajendranagar
Photo Courtesy: 
CRRI
25
Jul

Distribution, Bio ecology and Host range of White grub

Distribution of White grub

  • Hilly regions of Uttaranchal

Bio ecology of White grub

File Courtesy: 
Field management of insect pests of rice - A ready reckoner. Technical Bulletin No.46, Directorate of Rice Research, Rajendranagar, Integrated Pest management in Rice, Technical bulletin No. 15, DRR, Rajendranagar, Hyderabad
Photo Courtesy: 
Dr.Chitra Shanker
19
Jul

Taxonomy of White grub

Taxonomy of White grub

Class: Insecta

Order: Coleoptera

Family : Scarabidae

Genus : Holotrichia

Species : spp

File Courtesy: 
Field management of insect pests of rice - A ready reckoner. Technical Bulletin No.46, Directorate of Rice Research, Rajendranagar.
Photo Courtesy: 
CRRI
19
Jul

Management of Rice Hispa

Management of Rice Hispa

Management of Rice Hispa includes

  • cultural,
  • biological and
  • chemical methods.

Cultural control of Rice hispa

File Courtesy: 
Insect Pests of Rice by M. D. Pathak and Z. R. Khan , INSECT PEST MANAGEMENT IN RICE IN INDIA . PASALU ET.AL., DIRECTORATE OF RICE RESEARCH RAJENDRANAGAR, HYDERABAD-30, A.P., INDIA
Photo Courtesy: 
CRRI
19
Jul

Nature and symptoms for damage of Rice Hispa

Nature and symptoms for damage of Rice Hispa

1. The adult beetles feed on the epidermal tissue of the leaves and the grubs mine the leaf tissue and pupate there.

2. The beetles scrape the chlorophyll between the veins of the lamina resulting in whitish parallel streaks. Later, owing to indiscriminate feeding even on leaf veins, white blotches appear on leaves.

3. In severe epidemics leaves dry up and the crop presents a scorched appearance.

File Courtesy: 
INSECT PEST MANAGEMENT IN RICE IN INDIA . PASALU et.al., DIRECTORATE OF RICE RESEARCH RAJENDRANAGAR, HYDERABAD-30, A.P., INDIA
Photo Courtesy: 
CRRI
19
Jul

Bioecology of Rice Hispa

Bioecology of Rice Hispa

1. The female beetles scrape the tender portions of the leaf epidermis and oviposit inside the mesophyll.Each female lays 33-101 eggs.

2. The incubation period of the egg is 3-5 days. The grubs moult 4 times and the larval period is 10-15 days. The pupal duration is 4-6 days and adults live up to 78 days.

File Courtesy: 
INSECT PEST MANAGEMENT IN RICE IN INDIA . PASALU et.al., DIRECTORATE OF RICE RESEARCH RAJENDRANAGAR, HYDERABAD-30, A.P., INDIA
Photo Courtesy: 
CRRI
19
Jul

Distribution for Rice hispa

Distribution for Rice hispa

1. Earlier a minor pest, Hispa (Dicladispa armigera) is now a major pest of rice particularly in north eastern, eastern and central regions of India.

2. It is a major pest of rice in Assam, Bihar, west Bengal, Madhya Pradesh and Andhra Pradesh.

File Courtesy: 
INSECT PEST MANAGEMENT IN RICE IN INDIA . PASALU et.al., DIRECTORATE OF RICE RESEARCH RAJENDRANAGAR, HYDERABAD-30, A.P., INDIA
Photo Courtesy: 
CRRI
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