17. Insect pests of intercrops and their potential to infest oil palm in an oil-palm-based agroforestry system in India.
Trop. Pest Management, 37, 1991, pp. 57-58
In the present study insect pests of various intercrops in the oil-palm-based agroforestry system were surveyed and their potential to infest oil palm was assessed.
The oil palm is usually grown as a monocrop. In small oil palm holdings the available wide interspace (9 m x 9 m) is used for interplanting of various shade-loving food crops. Similarly, interplanting of perennial crops such as cacao, coffee and rubber with oil palm has also been attempted. Intercropping of various forest trees such as Albizzia,
Eucalyptus, Casuarina and Australian black wood, as well as cacao with oil palm in an oil-palm-based agroforestry system, was initiated.
The major problem in growing intercrops with oil palm is that they are susceptible to attack by a wide range of insect pests. There should be no risk of an intercrop pest attacking the oil palm and developing into a problem.
An on-going oil-palm-based agroforestry trial was surveyed at monthly intervals between 1985 and 1988, and the insect pests of intercrops as well as oil palm were recorded.
Among the seven species of crops grown as intercrops with oil palm, no pest incidence was noticed on Eucalyptus and Australian black wood. Pest incidence was noticed in all the other intercrops, and the attack was f.e. greater in cacao and Albizzia. In Casuarina the incidence of insect pests was occasional and less severe.
Insect pests of intercrops such as Albizzia and Casuarina are host-specific and do not infest oil palm.
Among the seven species of intercrops only cacao shared a common pest complex with oil palm.
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Asia, Philippines, IRRI, rice, weather, forecasting, insect pest outbreaks
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