Sampling methods for damage assessment of Piesmopoda obliquifasciella (Hamps) on Cassia fistula L.
Sampling methods for damage assessment of Piesmopoda obliquifasciella (Hamps) on Cassia fistula L.
G. A. Bajwa and H. Gul
ABSTRACT
Piesmopoda obliquifasciella (Hamps) has been recorded damaging Cassia fistula severely at Peshawar. A survey
was carried out to determine the number of sample per tree for accurate and precise damage assessment. A maximum of 39.06 ± 6.10 and minimum of 25.88 ± 2.58 percent damage was recorded at 2-3.5 and 4-5 meters tree height, respectively. On western, eastern, and northern side of crown, difference in damage at the two tree heights was significant (P< 0.05), while it was insignificant on southern side. Similarly, the overall damage on the four directions differed significantly. The highest (36.49%) and the lowest (31.88%) overall
damage was recorded on western followed by eastern (34.96%, 31.81%), southern (30.93%, 29.67%) and northern (30.29%, 28.95%) sides.
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June 1995
Vol. 45, Iss. 2
