Management of Red palm weevil

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Management of  Red palm weevil
Rhynchophorus ferrugineus

( this document talks about controlling Red palm weevil on Coconut but it prevention methods suitable for all )

 Young palms between the age of 04 -15 years are highly susceptible to Red Weevil attack. Coconut growers are advised to inspect young palms in the above age category at least once a week for early detection of Red Weevil attack. Female weevils lay eggs only on fresh wounds on young palms. Therefore, it is necessary to ensure that all fresh wounds on young palms are treated with the application of Coal tar or burnt (used) engine oil.

*Inspect all young palms at least once a week and clean the crown and the trunk of palms by carefully removing dried fronds and other material. This facilitates early identification of pest damage. Coal tar or used engine oil should be applied on fresh wounds on trunks and petioles.

*Severely damaged palms, which are beyond recovery, should be cut, spilt and burnt

Control methods

The recommended systemic insecticide is Monocrotophos 60%, 20 ml/coconut tree

Method of application

 

Trunk injection for palms, which have fully developed trunk.

 

Pouring of insecticide to the bud region, for young palms, which do not have fully developed trunk.

Root feeding method

 

Reduce the Red Weevil population by using pheromone trap.

 Remove and burn all wilting or damaged palms in coconut gardens to prevent further perpetuation of the pest.

• Avoid injuries on stems of palms as the wounds may serve as oviposition sites for the weevil. Fill all holes in the stem with cement.

• Avoid the cutting of green leaves. If needed, they should be cut about 120 cm away from the stem.

• Plug all holes and inject Pyrocone E or Carbaryl 1% or 10 ml of Monocrotophos into the stem by drilling a hole above the points of attack.

• Setting up of attractant traps (mud pots) containing sugarcane molasses 2½ kg or toddy 2½ litres + acetic acid 5 ml + yeast 5 g + longitudinally split tender coconut stem/logs of green petiole of leaves of 30 numbers in one acre to trap adult red palm weevils in large numbers.

 Management of black beetle

Mechanical method

Beetle is removed using a pointed metal hook and treat the wound with coal tar or used engine oil.

Cultural methods

Decaying  breeding grounds – decaying coconut logs and stumps should be removed and burnt.

Mulch on the manure circle should be inspected periodically and replaced with fresh materials.

Chemical methods

Apply coal tar or used engine oil on leaf axils around the bud region as a repellent

Place naphthalene balls into each of the innermost leaf axils.

Apply insecticides;

Carbofuran 3% at the rate of 15 g and 30 g for seedlings and young palms respectively.

Cabofuran 10% at the rate of 10 g and 15 g for seedlings and young palms respectively.

Method;

Mix the recommended dose with equal amount of sand.

Place the mixture into the leaf axils around the bud.

 

 

[avanza]

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