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Pests

Pests
1
Aug

Gundhi bug and Sucking bug

Nature of damage:
Nymphs and adults both suck the sap from the developing grain at milky stage by which grain become chaffy, empty and some grains develop but break during milling.

File Courtesy: 
Rice Research Station, Kaul (Kaithal), Haryana
Photo Courtesy: 
Rice Research Station, Kaul (Kaithal), Haryana
1
Aug

Management of Rice root aphid

1. Soil incorporation with Carbofuran 3 G @ 1.6 g/m2 (l/2 kg. a.i. /ha) followed by root -zone spray with monocrotophos (0.05 % concentration) at 60 days after sowing.

2. This will also reduce other pest like stem borer, stem fly, leaf roller, WBPH and green leaf hoppers.

File Courtesy: 
Rice Research Station, Kaul (Kaithal), Haryana
1
Aug

Rice root aphid

Nature of damage:
1. Nymphs and adults suck the sap from the tender roots. In heavy infestation seedlings' growth is stunted, become pale yellow in colour and do not flower.

2. The infestation starts in vegetative stage 25 -30 days after sowing and continues till ripening.

File Courtesy: 
Rice Research Station, Kaul (Kaithal), Haryana
Photo Courtesy: 
Rice Research Station, Kaul (Kaithal), Haryana
30
Jul

Rice field crab

 

Scientific name : Paratelphusa hydrodromus

Local name :

Damage of Rice field crab:

1. The seedlings are cut by crabs at ground level into small bits which are carried to the holes for feeding.

2. In older plants outer sheaths are cut open and the inner portions are consumed.

3. In an attacked field bits of leaves and stems can be seen floating in water.

File Courtesy: 
CRRI
Photo Courtesy: 
CRRI
30
Jul

Paddy mite

Scientific name : Oligonychus oryzae

Local name :

Damage of Paddy mite:

Infested leaves become white between the veins and eventually get shredded with the veins remaining green.

Control of Paddy mite:

Foliar spray of dicofol 18EC@ 2.5lit./ha or profenophos 50EC @ 1 lit./ha or monocrotophos 36EC @ 1.3 lit./ha just after initial symptom check the damage due to mite.

File Courtesy: 
CRRI
Photo Courtesy: 
CRRI
30
Jul

Tarsonemid mite

 

Scientific name : Steneotarsonemus spinki

Local name :

Damage of Tarsonemid mite:

1. This mite is found between stem and leaf sheath in colonies.

2. It causes sterility and deterioration of rice grain quality along with pathogenic fungi.

3. It damages parenchmatous tissues of rice plant and reduce the amount of nutrients to the developing grain resulting in reduction of grain weight and size.

File Courtesy: 
CRRI
Photo Courtesy: 
CRRI
30
Jul

Rice mealy bug

 

Scientific name : Brevennia rehi

Local name :

Damage of Rice mealy bug:

Both nymph and adult of mealy bug suck the sap by remaining concealed within leaf sheath of the plant which causes stunted growth and yellowish curled leaves in sunken oval or round patches of a normal crop and the plants may either die or put forth distorted panicles with chaffy grains.

File Courtesy: 
CRRI
Photo Courtesy: 
CRRI
30
Jul

Rice Thrips

 

Scientific name : Baliothrips biformis

Local name :

Damage of Rice thrips:

1. This is essentially a pest of nurseries causing severe damage.

2. The larvae and adults lacerate the tender leaves and suck the plant sap causing rolling and drying of the leaf tips.

3. In severe infestation, the seedlings are killed.

Control of Rice thrips:

File Courtesy: 
CRRI
Photo Courtesy: 
CRRI
30
Jul

Termite

 

Scientific name : Microtermes obesi .

Local name :

Damage of Termite: 

1. Termite feeding on the roots cause yellowing older leaves of plants, then wilting and finally collapsing of the plant.

2. Damaged plants can easily be pulled out by hand. Termite attack on the germinating seeds render to loss of plant stand and under severe infestation resowing is required.

File Courtesy: 
CRRI
Photo Courtesy: 
CRRI
30
Jul

Rice case worm

 

Scientific name: Nymphula depunctalis

Local name:

Damage of Rice case worm:

1. Larvae cut off the leaf tips and prepare a cylindrical tube like case and dwell inside it and often float in water.

2. They move with their cases and feed on leaves by scraping patches of green tissues sometime leaving only the white epidermis.

Control of Rice case worm:

File Courtesy: 
CRRI
Photo Courtesy: 
CRRI
30
Jul

Leaf folder

 

Scientific name : Cnaphalocrocis medinalis.

 Local name:

Damage of Leaf folder:

1. Larvae fold the leaves, remain inside the fold and scrape green tissues between the veins which makes the leaves white and papery.

2. Gradually the leaves dry up and the field presents a scorched appearance.

Control of Leaf folder:

File Courtesy: 
CRRI
Photo Courtesy: 
CRRI
30
Jul

Green leaf hopper(GLH)

 

Scientific Name: Nephotettix virescens

Local name:

Damage of Green leaf hopper:

1. Nymph and adult suck cell sap and attract sooty mould.

2. Heavy infestation causes withering and complete drying of crop.

3. This pest is a potent vector transmitting several viral diseases like rice tungro diseases which cause yellowing, stunting and drying of plant.

File Courtesy: 
CRRI
Photo Courtesy: 
CRRI
30
Jul

Rice bug/ Gundhi bug/ Ear head bug

 

Scientific Name : Leptocorisa acuta.

 Local Name :

Damage of Gundhi bug:

Sucking of grain sap by the bug causes ill-filled/ partially filled and chaffy grains and subsequent infection by fungi and bacteria results in grain discolouration.

Control of Gundhi bug:

File Courtesy: 
CRRI
Photo Courtesy: 
CRRI
30
Jul

Rice hispa

 

Scientific name : Dicladispa armigera .

Local name :

Damage of Rice hispa:

Both adults and grub feed on the green matter of the leaves in short straight line parallel to mid rib.

The attacked leaves turn whitish and membranous.

Control of Rice hispa (RH):

File Courtesy: 
CRRI
Photo Courtesy: 
CRRI
30
Jul

White backed plant hopper(WBPH)

 

Scientific name : Sogatella furcifera .

Local name:

Damage of White backed plant hopper:

1. Both the nymphs and adults injure alike by sucking phloem sap leading to reduced vigor, stunting, yellowing, delayed tillering and grain formation. Their feeding attract sooty mould.

File Courtesy: 
CRRI
Photo Courtesy: 
CRRI
30
Jul

Brown plant hopper (BPH)

 Scientific name : Nilaparvata lugens.

  Local name:

Damage of Brown plant hopper:

This pest causes draining out of plant fluid and nutrients by continuous sucking during high infestation and plants become yellow and finally die.

This symptom of crop damage is known as hopper burn.

Control of Brown plant hopper:

File Courtesy: 
CRRI
Photo Courtesy: 
CRRI
30
Jul

Asian rice gall midge

 

Scientific name : Orseolia oryzae

Local name:

Damage of Asian rice gall midge:

1. Infestation starts from nursery to panicle stage of the crop.

2. After hatching the maggots migrate to the growing meristematic tissue and feed on it, which in turn causes formation of gall called silver shoot/ onion shoot.

Control of Asian rice gall midge:

File Courtesy: 
CRRI
Photo Courtesy: 
CRRI
30
Jul

Yellow stem borer (YSB)

 

Scientific name: Scirpophaga incertulas Walker.

 Local name :

Identification of Damage Yellow stem borer:

1. The larvae bore into the leaf sheaths within 24 h of hatching and later enter the stem mostly the nodal region.

File Courtesy: 
CRRI
Photo Courtesy: 
CRRI
29
Jul

Thrips ( elaipane )

 

1. Common name- Thrips.

 2. Scientific name - Stenchaetothrips biformis.

 3. Vernacular name - elaipane ( இலைப்பேன் ).

Symptoms of damage of Thrips:

• Laceration of the tender leaves and suck the plant sap.

• Yellow (or) silvery streaks on the leaves of young seedlings.

• Terminal rolling and drying of leaves from tip to base.

File Courtesy: 
TNRRI, Aduthurai
Photo Courtesy: 
TNRRI,Aduthurai
29
Jul

Rice Earhead Bug ( Kathier navaipoochi )

 

1. Common name- Rice earhead bug.

2. Scientific name - Leptocorisa acuta.

 3. Vernacular name - Kathier navaipooch.

Symptoms of damage of Rice earhead bug:

• Sucking the sap from individual grains, which are in milky stage. • Individual grains become chaffy.

 • Black spots on the grains at the site of feeding puncture.

File Courtesy: 
TNRRI, Aduthurai
Photo Courtesy: 
TNRRI,Aduthurai
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