Citation
De Chenon R.D., . and Asj'ari M., . and Kitu W.T., . (1990) An unnoticed important pest on germinating coconuts in Indonesia Pterolophia apiceplagiata Breuning Coleoptera Cerambycidae. [Proceedings Paper]
Abstract
A species of the genus Pterolophia Cerambycidae Lamiinae has been observed attacking the germinating nuts in seedbeds. The larva hatching from egg laid at the attack point of the nut bores directly towards the germ feeding on the fiber husk and digging into the germ pores until sometimes perforation. When the germ is present it is eaten and destroyed or more easily affected by Marasmiellus. Also as a result the seedlings can be so much damaged that they must be discarded. The incidence of the damages on the nuts in sedbeds varies from 14.5 to 31.4 p. 100. The different hybrids checked MAWA KHINA were affected. The nuts were found to be already attacked upon arrival from the seed garden. Then this pest was detected in several seed gardens in South Sumatra with 12 to 32 p. 100 nuts having presence of Pterolophia. Nuts that are left for longer period on the soil are more damaged with 13 p. 100 nuts found to be affected when collected directly on the bunch and 44p. 100 after four weeks on the soil. In commercial fields too this pest was found to be present in 15.7 to 17 p. 100 of the nuts that were already matured and dried. This insect breeds and multiplies on the empty inflorescences left hanging on the stem after the collection of nuts or on the empty inflorescences thrown and accumulated in interrows. More than half of those still on the stem or in the interrow have one to four larvae per peduncle when it is dissected. The biology and behaviour of Pterolophia was studied and the life cycle duration is 2.5 to 3 months. For control Monocrotophos at the dosage of 0.6 g a.i./lt water was used. Complete protection is given by an injection near the germ of 5 cc of this solution to each nut previously notched. The method of dipping the notched nuts in this solution is faster but less effective if the nuts are not left in this product for more than 10 minutes. In the field chemical treatments directly on the crown decrease the beetle population. However sanitation by cutting away the empty inflorescences from the stems immediately after collection of the nuts removing them from the interrows and then disposing of them by burning seems the more effective
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Abstract
A species of the genus Pterolophia Cerambycidae Lamiinae has been observed attacking the germinating nuts in seedbeds. The larva hatching from egg laid at the attack point of the nut bores directly towards the germ feeding on the fiber husk and digging into the germ pores until sometimes perforation. When the germ is present it is eaten and destroyed or more easily affected by Marasmiellus. Also as a result the seedlings can be so much damaged that they must be discarded. The incidence of the damages on the nuts in sedbeds varies from 14.5 to 31.4 p. 100. The different hybrids checked MAWA KHINA were affected. The nuts were found to be already attacked upon arrival from the seed garden. Then this pest was detected in several seed gardens in South Sumatra with 12 to 32 p. 100 nuts having presence of Pterolophia. Nuts that are left for longer period on the soil are more damaged with 13 p. 100 nuts found to be affected when collected directly on the bunch and 44p. 100 after four weeks on the soil. In commercial fields too this pest was found to be present in 15.7 to 17 p. 100 of the nuts that were already matured and dried. This insect breeds and multiplies on the empty inflorescences left hanging on the stem after the collection of nuts or on the empty inflorescences thrown and accumulated in interrows. More than half of those still on the stem or in the interrow have one to four larvae per peduncle when it is dissected. The biology and behaviour of Pterolophia was studied and the life cycle duration is 2.5 to 3 months. For control Monocrotophos at the dosage of 0.6 g a.i./lt water was used. Complete protection is given by an injection near the germ of 5 cc of this solution to each nut previously notched. The method of dipping the notched nuts in this solution is faster but less effective if the nuts are not left in this product for more than 10 minutes. In the field chemical treatments directly on the crown decrease the beetle population. However sanitation by cutting away the empty inflorescences from the stems immediately after collection of the nuts removing them from the interrows and then disposing of them by burning seems the more effective
Additional Metadata
| Item Type: | Proceedings Paper |
|---|---|
| Additional Information: | 6 tables; 6 ref. |
| AGROVOC Term: | COCOS NUCIFERA |
| AGROVOC Term: | CONTROL DE INSECTOS |
| AGROVOC Term: | CERAMBYCIDAE |
| AGROVOC Term: | INDONESIA/ GERMINACION |
| AGROVOC Term: | TRATAMIENTO ANTERIOR A LA SIEMBRA |
| AGROVOC Term: | INYECCION |
| Geographical Term: | MALAYSIA |
| Depositing User: | Ms. Norfaezah Khomsan |
| Last Modified: | 24 Apr 2025 05:26 |
| URI: | http://webagris.upm.edu.my/id/eprint/14871 |
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