What it does
When fields experience many replanting, plants tend to have different maturity rates and different grain filling and moisture at the time of harvest.
Direct losses of seeds can be due to shattering or lower head rice recovery at milling.
Why and where it occurs
The problem arises when there are problems of crop establishment (e.g., low seed rate, poor seed quality, poor seed distribution or the loss of plants due to pests such as rats, snails or birds, or problems of crop emergence in direct seeded fields due to low spots or seed too deep, or a seeder clogged, etc.).
How to identify
Replanted areas exhibit the following:
- Plants in the field have different height and are at slightly different stages of development
- General pattern is patches across the field (often low spots or high spots where there were problems of crop establishment)
To confirm field problem, compare plants. Check or ask farmer about crop establishment and the extent of replanting and when replanted.
Click on images to enlarge
How to manage
- Ensure good seed quality, good water management and land leveling
Learn more
View full fact sheet: Replanted areas on IRRI Rice Knowledge Bank