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Diseases in Mango trees: body formed to suggest remedial steps

HYDERABAD (August 20 2007): Mango is a major fruit crop of Sindh and cultivated on an area of 492,138 hectares and its production was 349,587 tonnes in 2004-2005. Livelihood of million of people in Sindh is directly and indirectly depend on this crop. Mango tree suffers from several insects and diseases from nursery to fruit bearing stage and is responsible for tremendous losses in mango production.

Recently sudden quick decline has been recorded from district Hyderabad, Mirpurkhas and Sanghar district.

The mango trees start oozing gum viciously from trunk, lateral branches and starts wilting from top to bottom and entire plant die within shortest possible time. The intensity of this decline varies from location and variety.

In poor managed gardens the intensity is from 3 to 18 percent where as in managed gardens the intensity is below 1 percent. The disease was first recorded in early nineties on mangoes. Same disease is also prevailing in Punjab and neighbouring India. Looking to the gravity and complexity of the problem, Director General, Agriculture Research Sindh constituted a committee of experts under the chairmanship of DR Abdul sattar Buriro, Entomologist; agriculture research institute, Tandojam along with Ali Muhammad khaskheli (plant pathologist), Syed Ghulam shabir shah, members to conduct surveys and research trials based on bark beetle role as a disease carrier, its management and control of organisms associated with mango decline and suggest remedial measures to combat this problem.

Three experiments were conducted in collaboration with Bayer crop science at various locations viz Noor Ahmed Nizamani farm Tando Qasir, Abdul Hakim Dayo near Jakhra railway crossing and Abdul Shakoor Ansari farm at Rahoki. The results were satisfactory and highly encouraging.

Thrice at monthly interval through sprinkler on moist soil followed by irrigation the preliminary findings indicated that in drenching method carbendazim derosal provided satisfactory control that other fungicides against mango decline.

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