## Home⇛International Rice Research Notes⇛vol. 22 no. 2 (1997)

### Evolving Patterns of Rat Control at IRRI

Discipline: Agriculture

#### Abstract:

This report discusses the changes made at IRRI that have reduced rat problems. A 1987 survey (by N. S. Ahmed and others) indicated that 86% of some 171 field experiments, including 11 trials that were completely lost, suffered rat damage. The lost data were valued at US$370,000 and the direct cost of control US$402,000 (see figure). In 1989, control costs had risen to US$473,000 but by 1994, they had dropped to US$52,000, an annual savings of US\$421,000 and lost data costs were also decreased.