Pests and natural enemies in rice cropping system as affected by rice crop genetic diversification

Issue Date

10-2009

Abstract

This study aimed to develop a mechanism for genetic diversification in an intensive rice cropping system. In 2008, a study was conducted at PhilRice Central Experiment Station, Munoz, Nueva Ecija to test the effect of interplanting hybrid PSB Rc72H with a popular variety PSB Rc82 on incidence of insect pests, occurrence of natural enemies, and diseases. Results showed that there was lower whitebacked planthopper population in pure stand of PSB Rc82 and in field interplanted with of PSB Rc72H and PSB Rc82 compared to pure stand of PSB Rc72H. Based on the total numbers of arthropods collected during the dry season, there were more natural enemies in the interplanted field than in the pure stand field of either test variety. In the interplant, bacterial leaf blight incidence was reduced. During the wet season, result showed that there was lower incidence of bacterial leaf blight in PSB Rc82 and interplanted test variety than in the pure stand of PSB Rc72H. These results indicated that the interplanting has pest-reducing effects.

Source or Periodical Title

Philippine Entomologist

ISSN

0048-3753

Volume

23

Issue

2

Page

196

Document Type

Article

Frequency

semi-annually

Language

English

En – AGROVOC descriptors

INSECTA; ARTHROPODA; NATURAL ENEMIES; INTERCROPPING; CROPPING SYSTEMS; GENETIC DIVERSITY (AS RESOURCE); PEST CONTROL

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