Assessment of rice planthopper populations and damage

Issue Date

10-2015

Abstract

Recently, rice planthopper (RPH) are new threats to the sustainability of intensive rice production systems in Asia. Brown planthopper (BPH) outbreaks and associated disease epidemics were reported in Bangladesh, Cambodia, China, India, Indonesia, Japan, Korea, Laos, Malaysia, Thailand, and Vietnam. In view of this potential problem, monitoring of RPH with light trap was establish in 2015 in PhilRice Central Experiment Station (CES), Maligaya, Science City of Munoz, Nueva Ecija. To determine field populations, monitoring of BPH was done using sticky trap in two sites located in PhilRice CES, Science City of Munoz and Mabini, Sto. Domingo, Nueva Ecija. Based on monitoring of BPH using light trap, the highest numbers were recorded on the months of March to April and August to September. In monitoring BPH using sticky trap during the dry season (January to April) in PhilRice CES, Science City of Munoz, highest populations was observed in March. More white backed planthopper were recorded as compared with BPH. In Mabini, Sto. Domingo, Nueva Ecija, highest population of BPH was recorded in March, then decreased until harvest of the crop. These observed peaks of BPH populations coincided with the reproduction to ripening phases of rice plants in the field. During the field samplings, spiders, coccinellids, mirids and tiger beetles were commonly observed in the field. During the wet season (July to October), BPH populations were observed to be highest in the months of August to September in both sites. Although hopperburn was not observed in the selected sites, patches of hopperburn was not observed in the selected sites, patches of hopperburned fields were observed in nearby fields, barangays [villages] and town. Incidence of hopperburned fields ranged from 10 to 50%. It is necessary to take close monitoring of BPH and viruses to reduce vulnerability of rice to BPH infestation to prevent possible outbreaks.

Source or Periodical Title

The Philippine Entomologist

ISSN

0048-3753

Volume

29

Issue

2

Page

229-230

Document Type

Article

Frequency

semi-annually

Language

English

En – AGROVOC descriptors

INSECTA; PESTS; PESTS OF PLANTS; PEST INSECTS; ASSESSMENT

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