Impact of Pyrilla perpusilla infestation on yield of sugar cane crop
Observations on yearly basis were recorded on impact of Pyrilla perpusilla infestation on
cane yield during 2002, 2003 to 2004 infestation year (Fig. 3). It was observed that all
varieties of sugarcane tested, behaved differently during infestation and non-infestation years.
The maximum cane yield decline to 20 tons per acre in variety V1 and minimum cane yield
decline of 4 tons was recorded in variety V4. An average loss of 13.3 tons per acre yield was
recorded due to Pyrilla perpusilla infestation.