Incidence pattern of wood borer (Sinoxylon anale Lesne) on Dalbergia sissoo Roxb

摘要

The current shift in agroforestry practices from multispecies to monoculture has brought drastic changes in the tree based ecosystem and exposed these systems to greater risks of pest epidemics, as natural regulatory factors fail to operate in this system. D. sissoo is an important multipurpose tree species which yields timber, fodder, fuelwood and it is observed that the wood quality is mainly affected by wood borer (S. anale) in Bundelkhand region. Studies on incidence pattern of S. anale on the D. sissoo was carried out during 2016 at ICAR-CAFRI, Jhansi. The highest and lowest incidence was noticed on middle (56.00 +/- 11.31) and bottom (14.50 +/- 9.19) parts of the stem, respectively. The incidence was more on primary branches (17.46/branch) than secondary branches (7.26/branch). Uniform distribution of pest was noticed with less frequent bored holes in the bottom (8.97 +/- 3.35 cm distance), whereas more frequent holes were observed in middle and upper part of the tree (3.26 +/- 2.31 and 2.03 +/- 1.45 cm distance, respectively).