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Crop Protection

Crop Protection
11
Jul

Gall Midge taxonomy (Orseolia oryzae) Wood-Mason and Distribution

Gall midge taxonomy (Orseolia oryzae) Wood-Mason 

Class : Insecta

Order : Diptera

Suborder : Nematocera

Family : Cecidomyiidae

Genus : Orseolia

Species : oryzae

 

 

Distribution of Gall midge

File Courtesy: 
Insect Pests of Rice by M. D. Pathak and Z. R. Khan
Photo Courtesy: 
Mr. Y. Kondal Rao (DRR)
11
Jul

Chemical control of stem borer

Chemical control of stem borer

Recommended insecticides for granular application :

  • Carbofuran 3G @ 25 kg ha-1
  • Phorate 10 G @ 10 kg ha-1
  • Cartap 4 G @ 25 kg ha-1
  • Fipronil 0.3 G @ 25 kg ha. –1
  • Chlorpyriphos 10G @ 10 kg ha-1

Recommended insecticides and doses for spray (Twice at 7-10 days interval)

File Courtesy: 
INSECT PEST MANAGEMENT IN RICE IN INDIA . PASALU et.al., DIRECTORATE OF RICE RESEARCH RAJENDRANAGAR, HYDERABAD-30, A.P., INDIA
11
Jul

Biological control Rice Stem borer

Biological control Rice Stem borer

File Courtesy: 
Biological control of insect pests of rice. Technical bulletin No. 22, Directorate of Rice Research, Rajendranagar, Hyderabad
Photo Courtesy: 
Dr. Chitra Shanker(DRR)
11
Jul

Cultural Control of Stem Borer

Cultural Control of Stem Borer

File Courtesy: 
INSECT PEST MANAGEMENT IN RICE IN INDIA . PASALU et.al., DIRECTORATE OF RICE RESEARCH RAJENDRANAGAR, HYDERABAD-30, A.P., INDIA
Photo Courtesy: 
Mr. Y. Kondal Rao (DRR)
11
Jul

Management and Resistance Varieties for Stem Borer

Management of rice stem borer includes

  • cultural,
  • host plant resistance,
  • biological and
  • chemical methods.

Monitoring of brood emergence through Pheromone traps is important.

Resistant varieties for Stem Borer

  • Ratna,
  • Sasyasree and Vikas,
  • Ptb 13,
  • TKM 6,
  • IR 8,
  • W1263
File Courtesy: 
INSECT PEST MANAGEMENT IN RICE IN INDIA . PASALU et.al., DIRECTORATE OF RICE RESEARCH RAJENDRANAGAR, Integrated Pest management in Rice, Technical bulletin No. 15, DRR, Rajendranagar, Hyderabad
Photo Courtesy: 
Mr. Y. Kondal Rao (DRR)
11
Jul

Nature of Damage of Stem Borer

Nature of Damage of Stem Borer 

1. The larvae of the borers enter the tiller, feed, grow and cause the characteristic symptoms of ‘dead hearts’ or ‘white ears’ depending on the crop stage.

2. At tillering stage, the feeding frequently results in severing the apical parts of the plant from the base.

File Courtesy: 
INSECT PEST MANAGEMENT IN RICE IN INDIA . PASALU et.al., DIRECTORATE OF RICE RESEARCH RAJENDRANAGAR, HYDERABAD-30, A.P., INDIA
Photo Courtesy: 
Dr. Chitra Shanker(DRR)
11
Jul

Host Range of Rice Stem Borers

Host Range of Rice Stem Borers

Yellow stem borer: Though considered predominantly as a monophagous pest, YSB has also been reported from wild rices (Oryza spp.), Cyperus, Cyanodon dactylon and Leptochloa panicoides.

White stem borer: Cyperus spp, Saccharum officinarum, S. spontaneum, S.arundinaceum, Eleocharis sp, Cyanodon dactylon and Oryza australiensis have been reported as alternate hosts of this insect in India.

File Courtesy: 
Rice stem borers in India- species composition and distribution. Technical Bulletin No. XX,Directorate of Rice Research, Rajendranagar, Hyderabad - 500 030, A.P., India.
11
Jul

Life cycle of Dark headed borer (DHB), Chilo polychrysus (Meyrick)

Life cycle of Dark headed borer (DHB), Chilo polychrysus (Meyrick) 

File Courtesy: 
Rice stem borers in India- species composition and distribution. Technical Bulletin No. XX,Directorate of Rice Research, Rajendranagar, Hyderabad - 500 030, A.P., India.
Photo Courtesy: 
Dr. Chitra Shanker(DRR)
11
Jul

Life cycle of Striped stem borer (SSB), Chilo suppressalis (Walker)

Life cycle of Striped stem borer (SSB), Chilo suppressalis (Walker)

File Courtesy: 
Rice stem borers in India- species composition and distribution. Technical Bulletin No. XX,Directorate of Rice Research, Rajendranagar, Hyderabad - 500 030, A.P., India.
Photo Courtesy: 
Dr. Chitra Shanker(DRR)
11
Jul

Life cycle of White stem borer Scirpophaga nivella Wlk, S. innotata Wlk.

Life cycle of White stem borer Scirpophaga nivella Wlk, S. innotata Wlk. 

a. Scirpophaga nivella (Fabricius)

File Courtesy: 
Rice stem borers in India- species composition and distribution. Technical Bulletin No. XX,Directorate of Rice Research, Rajendranagar, Hyderabad - 500 030, A.P., India.
Photo Courtesy: 
Dr. Chitra Shanker(DRR)
11
Jul

Life cycle of Yellow stem borer Scirpophaga incertulas Wlk

Life cycle of Yellow stem borer Scirpophaga incertulas Wlk 

1.Yellow stem borer (YSB), Scirpophaga incertulas (Walker)

File Courtesy: 
Rice stem borers in India- species composition and distribution. Technical Bulletin No. XX,Directorate of Rice Research, Rajendranagar, Hyderabad - 500 030, A.P., India.
Photo Courtesy: 
FIELD MANAGEMENT OF INSECT PESTS OF RICE - A READY RECKONER. TECHNICAL BULLETIN NO.46, DIRECTORATE OF RICE RESEARCH, RAJENDRANAGAR
11
Jul

Pest behavior of stem borers

Pest behavior of stem borers 

File Courtesy: 
INSECT PEST MANAGEMENT IN RICE IN INDIA . PASALU ET.AL., DIRECTORATE OF RICE RESEARCH RAJENDRANAGAR, HYDERABAD-30, A.P., INDIA
Photo Courtesy: 
Mr. Y. Kondal Rao (DRR)
11
Jul

Bio- ecology of Stem Borers

Bio- ecology of Stem Borers 

Favourable factors:

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
11
Jul

Distribution of Rice Stem borers species

Distribution of Rice Stem borers species 

1. Rice stem borers are a key group of insect pests damaging rice crop considerably.

2. There are five species of stem borers distributed throughout India. Among them, Yellow Stem Borer (YSB), Scirpophaga incertulas Wlk. is the most widespread, dominant and destructive pest.

File Courtesy: 
Rice stem borers in India- species composition and distribution. Technical Bulletin No. XX,Directorate of Rice Research, Rajendranagar, Hyderabad - 500 030, A.P., India.
Photo Courtesy: 
Dr. Chitra Shanker(DRR)
11
Jul

Yellow Stem Borer – Taxonomy

Yellow Stem Borer – Taxonomy 

Class : Insecta

Order : Lepidoptera

Families : Pyralidae

Genus : Scirpophaga

Species : incertulas

File Courtesy: 
Insect Pests of Rice by M. D. Pathak and Z. R. Khan
Photo Courtesy: 
crri
11
Jul

Insect pests of national importance

Insect pests of national importance: 

1. Stem borer

2. Gall midge

3. Green leafhopper

4. Plant hoppers

5. Leaf folder

6. Gundhi bug

File Courtesy: 
Field management of insect pests of rice - A ready reckoner. Technical Bulletin No.46, Directorate of Rice Research, Rajendranagar.
Photo Courtesy: 
CRRI
11
Jul

Chlorotic Streak

Introduction:

The Chlorotic streak disease was first reported from Cuttack, India in 1978 (Anjaneyulu et al.,1980)

1. Stunting, striping or mottling of newly emerging leaves and Chlorotic streaking,

2. The spikelets get discolored and become sterile

Symptoms of Chlorotic Streak Disease

The symptoms of Chlorotic streak are:

1. Stunting, striping or mottling of newly emerging leaves and Chlorotic streaking.

2. The spikelets get discolored and become sterile.

File Courtesy: 
RICE” written by Jata S. Nanda and Pawan K. Agarwal.2006. Kalyani Publishers, p No.216
11
Jul

Transmission and Control Measures of Rice yellow mottle

Transmission of Rice yellow mottle virus

1. Transmissible by chrysomelid beetles belonging to the subfamilies Criocerinae, Cryptocephalinae, Galerucinae (Sesselia pusilla), Halticinae (Chaetocnema spp.) and Hispinae (Trichispa sericea).

2. The long-horned grasshopper Conocephalus merumontanus also transmits the virus (Bakker, 1974).

3. Chaetocnema pulla carries the virus in the field.

4. S. pusilla, C. pulla and T. sericea sometimes acquire the virus in 15 min and also sometimes inoculate in 15 min.

File Courtesy: 
http://www.dpvweb.net/dpv/showdpv.php?dpvno=149
11
Jul

Rice Yellow Mottle Virus (RYMV)

Rice Yellow Mottle Virus (RYMV)

1. The morphology of Rice yellow mottle virus

2. The virus is stable in vitro and easy to purify (Bakker, 1970, 1974). Fresh or deep-frozen young rice leaves, harvested 10-12 days after infection are best for purification.

3. Homogenize small pieces in 0.1 M phosphate buffer pH 5.0 + 0.2% 2-mercaptoethanol (1 g of leaves/20 ml of buffer). Squeeze through cloth. Emulsify extract with 0.5 vol chloroform (5 min) and centrifuge at low speed.

File Courtesy: 
http://www.dpvweb.net/dpv/showdpv.php?dpvno=149
11
Jul

Rice Yellow Mottle - Introduction, Symptoms and Pre-disposing factors

Introduction to Rice Yellow Mottle

1. Rice yellow mottle virus was reported first in Kenya.

2. This disease is also reported from Liberia, Sierra leone and Tanzania.

3. Infection even at a late stage of growth results in significant yield loss and in severe cases the effected plant may die.

Symptoms of Rice Yellow Mottle

1. The virus causes a yellow or orange leaf discoloration, stunting and sterility in rice.

2. Infected rice plants are found first near the bunds but soon thereafter whole fields may be affected.

File Courtesy: 
http://www.dpvweb.net/dpv/showdpv.php?dpvno=149
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