Best Viewed in Mozilla Firefox, Google Chrome

Crop Protection with vernacular Names

Crop Protection with vernacular Names
27
जुलै

Brown leaf spot

1. Causal organism: Helminthosporium oryzae.

2. Local name:

3. Brown spot is a fungal disease that can infect both seedlings and mature plants. This disease is more severe in areas of poor management.

4. Major cause of 'Bengal Famine' in 1942, due to yield loss of 50-90%, resulting in death of 2 m people.

File Courtesy: 
RARS, Karjat
Photo Courtesy: 
Dr. D. Krishnaveni (DRR)
27
जुलै

Damage symptoms of Sheath Blight disease (Parnkarpa)

1. Appearance of one or more relatively large, oblong or irregularly elongated lesions on the leaf sheath; in advanced stages center of the lesion becomes bleached with an irregular purple brown border.

2. Initially these lesions are white in colour later it turns to dark brown.

3. At severe condition drying of leaves.

File Courtesy: 
RARS, Karjat
Photo Courtesy: 
http://www.forestryimages.org
27
जुलै

Control of Sheath Blight disease (Parnkarpa)

Cultural Practices to control Sheath Blight disease:

• Avoid using infected seed.

• Apply moderate 'N' levels (80-100 kg/ha) in 3-4 splits.

• Avoid excess 'N', skip final 'N' in sheath blight infected fields.

• Destroy stubbles / weeds, etc.

• Check brown plant hopper population.

Chemical control for Sheath Blight disease:

• Spraying fungicides of 1g carbendazim 50WP (540g/acre) or 2.0g mancozeb 75WP OR 1ml hexaconozole in 1 liter of water.

File Courtesy: 
RARS, Karjat
27
जुलै

Details of Sheath Blight disease ( Parnkarpa)

1. Period of occurrence: Tillering to milk stage.

2. Extent of yield loss: On an average, 20 to 50% annual yield loss Alternate hosts: Among the plants recorded as hosts are, sugarcane, bean, soybean, tomato, egg plant, tobacco, water hyacinth , hyacinth bean and green gram.

File Courtesy: 
RARS, Karjat
Photo Courtesy: 
Dr. D. Krishnaveni (DRR)
27
जुलै

Sheath Blight disease ( Parnkarpa)

1. Causal organism of Sheath blight: Rhizoctonia solani Kuhn.

2. Marathi name: Parnkarpa

3. Sheath blight is a fungal disease, more common in rainy season than in dry season in the topics.

4. This disease is problematic in areas where irrigation facilities are abundant.

5. Due to blighting of the leaf sheaths, it is commonly called as sheath blight.

File Courtesy: 
RARS, Karjat
Photo Courtesy: 
Dr. D. Krishnaveni (DRR)
27
जुलै

Why and when it occurs for Rice blast disease (Karapa)

1. Infection is most likely after long periods of rain or high humidity with little or no wind movement and relatively warm nights (63-73°F or 18-23°C).

2. These conditions favor spore germination and formation. Ensuring that the plants are flooded and avoiding drought stress are effective in controlling the fungus.

File Courtesy: 
RARS, Karjat
27
जुलै

Prevention and Treatment for Rice blast disease ( Karapa)

1. Cultural practices to control Rice Blast include the destruction of diseased crop residue, careful use of nitrogen fertilizer (high levels increase the likelihood of disease), the use of water seeding rather than drill seeding and ensuring that plants remain flooded all seem to help control the disease. Planting of resistant varieties of rice may also be helpful.

File Courtesy: 
RARS, Karjat
Photo Courtesy: 
http://www.lookatvietnam.com
27
जुलै

Symptoms of Rice blast disease (Karapa)

1. The disease is first seen as elliptical gray-white lesions with reddish edges on the leaves (leaf blast) and stems of the plant.

2. The lesions run parallel to the long axis of the leaf or stem.

3. Most damage occurs when the fungus spreads to the area below the seed head of the plant, causing it to break off (rotten neck).

File Courtesy: 
RARS, Karjat
27
जुलै

Rice blast disease (Karapa)

1. Causing organism of Rice blast: Pyricularia oryzae.

2. Marathi name: Karapa.

3. P. oryzae is an ascomycete fungus, a member of the sac fungi.

4. One of the features of these fungi is that they generate spores, called conidia or conidiospores, that can be easily dispersed by the wind and splashing rain.

File Courtesy: 
RARS, Karjat
Photo Courtesy: 
RARS, Karjat
20
जुलै

Symptoms and Nature of damage of Rice Hispa

Symptom of attack Rice hispa:

The mining of the grubs will be clearly seen on the leaves. White parallel line will be clear on the leaves.

Nature of damage of Rice hispa:

The grub mines into the leaf blade and feed on the green tissue between the veins. Adults also feed in the green tissue; they scrape the green matter of the tender leaves.

File Courtesy: 
ZARS, Mandya
Photo Courtesy: 
CRRI
20
जुलै

Control of Rice Hispa

Spray triazophos 40 EC @ 400 ml ha-1 or phosalone 35 EC @ 850 ml ha-1 or chlorpyriphos 20 EC @ 1500 ml ha-1or quinalphos 25 EC @ 1200 ml ha-1 or monocrotophos 36 WSC @ 850 ml ha-1or ethofenprox 10 EC @ 450 ml ha-1or fipronil 5 SC @ 600 ml ha-1or apply carbofuran 3G @ 25 kg ha-1.

File Courtesy: 
ZARS, Mandya
20
जुलै

Life stages of Rice hispa

Egg: Eggs are laid inside minute slits on the tender leaves generally toward the tip.

Grub: The grub is whitish yellow and flattened. It feeds inside the leaf tissue by mining. It pupates inside.

Adult: The adult beetle is somewhat square shaped about 1/6 to 1/8” in length and width. Dark blue or blackish in colour with spines all over the body.

File Courtesy: 
ZARS, Mandya
20
जुलै

Rice Hispa

Order: Coleoptera

Family: Chrysomelidae

Scientific name : Dicladispa armigera

Local name :

File Courtesy: 
ZARS, Mandya
20
जुलै

Control of Grass hoppers

1. Expose the eggs to be picked up by birds after ploughing and trim the bunds. Bio-control agents such as Cacallus spp., Barycomus spp. and Seelio spp., which are egg parasites, should be encouraged.

2. Dusting the crop with 5-10% BHC (or) methyl parathion 2% @ 25-30 kg/ha, fenitrothion (or) malathion 5% @ 20 kg/ha.

3. Spraying nuvan 100 EC @ 200 ml/ha (or) malathion 50 EC @ 2.5 lit/ha.

File Courtesy: 
ZARS, Mandya
20
जुलै

Life stages of Grass hoppers

1. H. banian has only one brood in a year. O. nitidula breeds throughout the year. Egg: It lays eggs in the wet sandy soil during October to November at a depth of about 2”especially in the side of bunds.

2. 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.

3. Nymphs: The nymphs feed on the grasses or paddy.

File Courtesy: 
ZARS, Mandya
20
जुलै

Symptoms and Nature of damage of Grass hoppers

Symptom of attack of Grass hoppers:

The nymphs and adults nibble leaves and also earheads in the early stages.

Nature of damage of Grass hoppers:

Both the adults and nymphs feed on the leaf and in severe cases the entire leaf may be eaten away.

File Courtesy: 
ZARS, Mandya
20
जुलै

Grass Hoppers

Order: Orthoptera

Family: Acrididae

Scientific name : Hieroglyphus banian (Large grasshopper)

Scientific name : Oxya nitidula (Small grasshopper)

Local name :

File Courtesy: 
ZARS, Mandya
20
जुलै

Symptoms and Nature of damage of Rice Leaf Folder

Symptom of attack of Leaf folder :

Leaves folded longitudinally or transversely with silk and scrapped patches in such places.

Nature of damage of Leaf folder:

1. The larvae feed by scraping the green mesophyll resulting in linear pale white stripe damage. Starting with the late second instar, when larvae regularly roll up leaves they become solitary.

File Courtesy: 
ZARS, Mandya
Photo Courtesy: 
CRRI
20
जुलै

Control of Leaf Folder

1. Early planting may help to avoid greater degrees of leaf damage.

2. Wider spacing and low usage of nitrogenous fertilizers decreases leaf damage.

3. Spray monocrotophos 36 WSC @ 850 ml ha-1or chlorpyriphos 20 EC @ 1500 ml ha-1or cartap 50 WP @ 600 g ha-1 or quinalphos 25 EC @ 1200 ml ha-1or acephate 50 WP @ 700 g ha-1or or fipronil 5 SC @ 600 ml ha-1

File Courtesy: 
ZARS, Mandya
20
जुलै

Life Stages of Leaf Folder

Egg: Flat oval yellowish eggs laid singly or in pairs on the undersurface of tender leaves.

Larva: Larva is yellowish green in colour and translucent about 16-20 mm long.

Pupa: It pupates inside the fold.

Adult: Adult is small yellow coloured moth with dark wavy lines on both pairs of wings.

File Courtesy: 
ZARS, Mandya
Syndicate content
Copy rights | Disclaimer | RKMP Policies