Population density of aphid (Myzus persicae Sulzer) and lady bird beetle (Coccinella septempunctata) on spring potato cultivars, Gilgit, Pakistan
Aqleem Abbas, Laila Khan, Kamran Sohail
Potato is an important cash crop of Gilgit Baltistan, an ecologically fragile region of Pakistan. The present study was carried out to find out the population density of Green peach aphid (Myzus persicae) and its associated natural enemy, lady bird beetle (Coccinella septempunctata ) on three cultivars of spring potato crop at Nomal valley, Gilgit Baltistan during 2013. Field experiment was carried out in randomized complete block design with three replications. Three potato cultivars namely Desiree, Diamont and Cardinal were tested in the experiment. Population of aphid (M. persicae) and lady bird beetle (Coccinella septepunctata) was recorded at weekly intervals throughout the growing season and it was observed that density of M. Persicae was highest on Cardinal (5.48 aphid per leaf) and lowest on Diamont (3.97 aphid per leaf). Similarly the population of lady bird beetle (Coccinella septempunctata)rnwas recorded highest on Cardinal (4.3 per plant) and lowest population was recorded on the Diamont (3.53 per plant). Population of M. persicae and Coccinella septempunctata was found to intermediate on Desiree (4.6 aphids per leaf and 3.91 lady bird beetles per plant) as compared to Cardinal and Diamont varieties of potato crop. Based upon our observation under the prevailing agro climatic condition of Nomal valley Gilgit Baltistan, it was concluded that Diamont variety was ideal for cultivation due to low aphid (M.Persicae) infestation as compared with Cardinal and Desiree variety of potato crop.
Aqleem Abbas, Laila Khan, Kamran Sohail. Population density of aphid (Myzus persicae Sulzer) and lady bird beetle (Coccinella septempunctata) on spring potato cultivars, Gilgit, Pakistan. J Entomol Zool Stud 2015;3(2):142-145.