标题：EXISTENCE OF PSEUDOMONAS SYRINGAE PV. SYRINGAE IN MANGO GROOVES OF SOUTHERN PUNJAB PAKISTAN REVEALS AN EMERGING THREAT OF APICAL NECROSIS DUE TO CLIMATE CHANGE
摘要：Mangifera indica L., the 2nd profusely produc-tive fruit in Pakistan. It is facing an emerging threat of necrosis and blackening of floral buds. In a survey of different mango orchards in Multan, various path-ogens were isolated as Pseudomonas syringae pv.sy-ringae,Fusarium mangiferae,Colletotrichum gloe-osporoides and Alternaria alternata. From infection frequency assessment,Pseudomonas syringae pv. syringae was found to be the most frequent isolated (79.53%) pathogen followed by Colletotrichum gloeosporides (57.73%),Alternaria alternata (15.93%) and Fusarium mangiferae(13.33%) at the flowering stage. Infection frequency of Pseudomo-nas syringae pv.syringae was maximum(93.33%)at stage A and minimum (58.67%)at stage J. It was also proven that Pseudomonas syringae pv. syingae infection was favored by high relative humidity ie.,>80%and low temperature(15-20C) with r value of +0.85 and -0.71 respectively. Amongst six chemicals evaluated in-vitro by poisoned food tech-nique, copper hydroxide was remarked as most ef-fective at 200 ug/ml concentration with colony inhi-bition of 37.444% followed by streptomycin sul-phate 200 ug/ml (29.67%) as compared to control (0.00%).
