Resistance/ susceptibility of different mango cultivars against mango mealybug (Drosicha mangiferae G.)

The experiment was conducted on different cultivars of mango viz.,chaunsa,black chaunsa,malda,fajri,ratul-12,langra,sensation,sindhri,dusehri,sufaid chaunsa,anwar ratul,and tukhmi for resistance/susceptibility against mango mealy bug during 2005-2006 and 2006-2007 in punjab,pakistan. on an average of both the study years,based on population density count of mango mealy bug,it was recorded that population was more on chaunsa cultivar i.e.,87.38 per 30-cm branch and minimum on tukhmi cultivar of mango i.e.,15.86 per 30 cm branch. the following ranking positions towards susceptibility of mango cultivars were observed ‘chaunsa’ > ‘black chaunsa’ > ‘malda’ > ‘fajri’ > ‘ratul-12’ > ‘langra’ > ‘sensation’ > ‘sindhri’ > ‘dusehri’ > ‘sufaid chaunsa’ > ‘anwar ratul’ and >‘tukhmi’. biochemical analysis of leaves and inflorescence showed that the chemical contents varies from cultivar to cultivar; however,carbohydrates were significantly higher in leaves of ‘chaunsa‘ cultivar i.e.,66.16 percent while tukhmi had significantly lower contents i.e.,43.80 percent of carbohydrates. so it was concluded that special attention on chaunsa (summer bahisht) cultivar of mango should be given when devising ipm program for the control of mango mealybug. © 2015 university of agriculture. all rights reserved.