TeleSupport India Repository

Solution Control of coconut perianth mite through root feeding
Country India
Last update: 08/12/2006
Summary In India coconut has an acerage of 1.89 million ha with a production of 12821 million and ranks third worldwide. Recently an eriophid mite, Aceria guerroernis has assumed a status of major pest. The status of the pest could be well judged from the extent of loss caused in different regions. It accounts for 40 50% loss in Tamil Nadu, 25 30% in Karnataka and 15 25% in Andhra Pradesh. The extent of loss in West Bengal is still not available but it is beyond doubt that the intensity of infestation is growing rapidly.In West Bengal, cultivation of coconut is discrete and most of the plant is about 20 30 feet tall. So spraying with insecticides is quite difficult as well as uneconomical. Root feeding of coconut with insecticidal solutions has proved to be an efficient method to combat the mite infestation.
forum discussion www.telesupport.org/simplemachines/index.php?topic=226.0 
Contributed by person details Mr. Subhra Saikat Roy (CI, TeleSupport India)
Challenge/Issue The population of this mite develops on the meristematic zone which is covered by the perianth.

Feeding by the mite in this zone cause damage to newly tissues and surface become necrotic.

Uneven growth results in distortions and stunting of the coconut leading to reduction in copra yield upto 50%.

This mite cause extensive premature dropping of coconut.

Three types of damage symptoms may be encountered:
1. The young button slowly dries up without shedding and the whole branch stands with full of dry button.

2.Buttons of 40 days old are shed periodically leaving a few nuts in the bunch or none.

3.Fruits of 6 inch or above develop a T shaped crack below the perianth, slowly spreads gum, turn burn, the skin develops warty patches and reduction in nut size.
Method 1. Select 4 brick red coloured root by digging from 4 opposite corners at a distance of 3 4 feet from the centre of the plant.

2. Make a slanting cut in the root with the help of a sharp knife.

3. Pour any of the insecticidal solution mentioned below in the plastic pouch measuring 5" X 3".

4. Place those pouch beneath the root, dip the root in the solution and tied the mouth with band.

5. Repeat it at 45 60 days interval thrice.

Insecticides:

Monocrotophos + water + urea + carbendazime @ 15 +15 + 2 +3 g /plant

Fenazaquin + water + urea + carbendazime @ 10 +10 + 2 +3 g /plant

Fenpropathrin + water + urea + carbendazime @ 10 +10 + 2 +3 g /plant

Carbosulfan + water + urea + carbendazime @ 10 +10 + 2 +3 g /plant

Aza neem 1% (Neemazol) water + urea + carbendazime @ 5 +10 + 2 +3 g /plant
Lessons learned 1. Infestation is more in 15 25 years old plant

2. If rainfall occurs during January to middle of April intensity of mite infestation decreases

3. During June July intensity of infestation remain high but decreases during December to middle of January

4. Balanced application of fertiliser with the following dose in two equal splits (before and after monsoon) reduces the intensity of infestation.
Urea 1300 g /plant year,
SSP 2000 g /plant year,
MOP 3500 g /plant year,
Borax 50 g /plant year,
Gypsum 1000 g /plant year and
MgSO4 500 g /plant year
List Keywords
Telesupport Themes IPM
Stage Country Region Location
Apply India West Bengal West Bengal
Role Organisation Acronym
Network Organisation organisation details TeleSupport India Network TeleSupport India
Type Title Function Download
Manual or guideline output details Control of coconut perianth mite through root feeding ' How to' manual 19kb
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