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19
Jul

Green leafhopper

Order: Hemiptera

Family: Cicadellidae

Scientific name: Nephotettix virescens

Local name:

19
Jul

Control of Thrips

• Spray any one of the following in nursery stage Phosphamidon 40 SL 50 ml Monocrotophos 36 SL 40 ml Endosulfan 35 EC 80 ml • Spray any one of the following in main field stage Phosphamidon 40 SL 300 ml Monocrotophos 36 SL 30 ml
19
Jul

Life stages of Thrips

1. 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.

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

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

19
Jul

Symptoms and Nature of damage of Thrips

Symptom of attack of Thrips: Affected nurseries present a pale yellow colour with brown tips. On passing the wet palm over the top of the seedlings a large number of black adults and yellowish nymphs may be seen striking to the palm. The infestation invariably disappears after sharp showers.

Nature of damage of Thrips:

19
Jul

Thrips

Order: Thysanoptera

Family : Thripida

Scientific name : Stenchaetothrips biformis

19
Jul

Control of Rice Root-Knot Nematodes in Karnataka

1. Cultural control measures of Rice Root-Knot nematode includes continuous flooding, raising the rice seedlings in flooded soils, and crop rotation. These practices will help prevent root invasion by the nematodes. 2. Soil solarization, bare fallow period and planting cover crops such as sesame and cowpea has been reported to decrease nematodes. Rotation crop like marigold (Tagetes sp.) is also effective in lowering root knot nematode populations because of its nematicidal properties. 3.
19
Jul

Damage of Rice Root-Knot Nematode in Karnataka

Symptoms of Rice Root-Knot Nematode are

1. Rice Root-Knot Nematode can be detected when plants are uprooted as it causes swellings and galls throughout the root system. Infected root tips become swollen and hooked, a symptom which is especially characteristic of this nematode.

2. In upland conditions and shallow intermittently flooded land it can cause severe growth reduction, unfilled spikelets, reduced tillering, chlorosis, wilting and poor yield. Symptoms often appear as patche

19
Jul

Rice Root-Knot Nematodes in Karnataka

 

Symptoms of Rice Root-Knot Nematode are 1. Rice Root-Knot Nematode can be detected when plants are uprooted as it causes swellings and galls throughout the root system. Infected root tips become swollen and hooked, a symptom which is especially characteristic of this nematode. 2. In upland conditions and shallow intermittently flooded land it can cause se
19
Jul

Control of Bacterial Leaf Streak disease in Karnataka

Chemical control measures of Bacterial Leaf Streak disease are, 1. Use of copper fungicides may help prevent disease occurrence and stop further disease spread. 2. Kocide (containing copper hydroxide) is effective against bacterial leaf diseases of rice such as leaf blight and streak. 3. Fungicide application must be done not later than 40 DAS. Beyond this, the bacteria must have taken their place inside the leaf.
19
Jul

Symptoms of Bacterial Leaf Streak disease in Karnataka

 

1. Symptoms of Bacterial Leaf Streak disease are initially, small, dark-green and water-soaked streaks on interveins from tillering to booting stage.

2. Streaks dark-green at first and later enlarge to become yellowish gray and translucent.

3. Numerous small yellow beads of bacterial exudates on surface of lesions on humid con

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