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28
Jul

Chronic Rodenticides

• In order to overcome limitations and hazardous nature of acute rodenticides, lengthy baiting programme and possibility of resistance, new series of rodenticides have been developed and known as single dose anti-coagulants or second generation anti-coagulants.

These rodenticides (Bromodiolone) combines better qualities of acute and chronic rodenticides.

• For effective and successful rodent control, the following programme should be adopted on large areas at a time on c

28
Jul

Management of Rodents

• In Local traps called ' butta' are extensively used for the control of rodents in rice. These traps provide fairly good results when applied after chemical control operation. • However when directly used, trapping will be costly affair and one can not manage entire population over large areas. • Moreover, at certain crop stages, like primordial formation, rodents are not attracted towards traps. Natural Smoke : The main principle involved in this operation is simply filling the b
28
Jul

Damage at Different Stages

In India, rodents have been estimated to cause 5 to 10% losses in rice. Among the field crops, rice is the most vulnerable crop to rodents. In addition to tiller cutting, they also hoard ripened panicles inside their burrows.

Nursery:

• The nurseries are drained out and the rodents run freely inside the bed spoiling all germinated seed. Later, they also cut the seedlings 1-2 inches above the water level.

Main field

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28
Jul

Damage at Different Stages

In India, rodents have been estimated to cause 5 to 10% losses in rice. Among the field crops, rice is the most vulnerable crop to rodents. In addition to tiller cutting, they also hoard ripened panicles inside their burrows.

Nursery:

• The nurseries are drained out and the rodents run freely inside the bed spoiling all germinated seed. Later, they also cut the seedlings 1-2 inches above the water level.

Main field

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28
Jul

Types of Rodents

 Rodents are one of the most important non - insects pests of agricultural crops, particularly rice.

Types of rodents :

• Lesser bandicoot rat: Bandicota bengalensis.

 • Field mouse: Mus booduga.

 • Indian gerbil: Tatera Indica.

 • Soft furred field rat : Rattus meltada

28
Jul

Rice based ecosystems of Maharashtra

Four different Rice based ecosystems are present in Maharashtra. Those are 1. Irrigated or flooded ecosystem. 2. Rainfed or lowland ecosystem. 3. Deep-water or floating ecosystem. 4. Upland or dryland ecosystem.
28
Jul

Post-harvest operations in Maharashtra

Threshing:

The crop is harvested close to the ground when about 90 per cent of the grains in the panicle are grey in colour ( Straw colour). Delayed harvesting causes considerable loss by shattering of grains resulting in considerable loss in yield and increased percentage of broken rice in hulling and due to damage by rats and birds.

The right stage of harvesting is when the ears are nearly ripe and the straw slightly green. The crop is generally cut with a sickl

28
Jul

Control Measures for Crab (Khekada)

Manual control measures for crab :

Collection and destruction of crabs using petro max in the beginning of rainy season.

Chemical control measures for crab :

Use of poison baits containing acephate @75 g. or carbaryl @ 100 g or endosulfan 40 ml mixed with 1 kg cooked rice.

28
Jul

Nature of damage of Crab (Khekada)

 

1. Crabs are polyphagous. They cut the young paddy plants near the ground level and carry them to their burrows for feeding. 2. They are mostly active during nights. Besides this they prepare a series of burrows in the embankment of paddy fields as result of which, water is not retained in the field which is vitally required fo
28
Jul

Crab (Khekada)

 

1. Pest Name - Crab.

2. Scientific Name - Paratelphusa spp.

3. Local Name - Khekada.

4. Infestation intensities - Low to moderate.

5. Crop Growth stages - Seedling.

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