Author(s):

Abdul Salam Mengal, Shahid Hussain, Dr. Manzoor Ali Abro, Tahira Nisa, Mohammad Rafiq khetran, Ghulam Yaseen Dahar, Umer Zaib, Syed Najeebullah Mushwani, Azizullah keerio, Sajjad Ahmed Maari

Abstract:

Fusarium wilt is one of the most serious and destructive diseases of mango nursery throughout Pakistan. This disease cause huge losses in mango nursery upto 22-25%. Keeping in view the losses caused by the Fusarium wilt in mango nursery, the present studies were planned to see the present position of the problem of Fusarium wilt disease by survey of disease incidence in different districts and to manage the disease by various methods of management like, use of chemicals and botanical extracts. The main objectives of the study were, (i) to record the disease incidence of Fusarium wilt in different mango nurseries of two districts of Sindh including, Hyderabad and Mirpurkhas (ii) to evaluate in vitro effect of different fungicides to manage this disease. For this purpose five fungicides were selected namely Nativo, Alliete, Cabriotop, Acrobat and Romeo. The concentrations of tested fungicides were kept (30. 60, 90 ppm) All the experiments were carried out according to the Randomized Completely Block Design (RCBD) with five treatments and three replications.

The results of our study showed that the disease is present in high frequency throughout all the districts surveyed. The maximum disease incidence of Fusarium wilt was recorded from Mirpurkhas (60.0%) followed by Hyderabad (55.0%). Five fungicides were tested for their efficacy against Fusarium oxysporum, Among all of them, Nativo was found more effective in reducing the linear colony growth of the fungus (3.33 mm) followed by Alliete (8.66 mm) and Cabriotop (19.00 mm), Whereas, the Acrobat was found moderately effective to reduce the linear colony growth of the fungus (24.70 mm) and Romeo was less effective (30 mm) as compared to control (82 mm). All the fungicides at their highest doses significantly reduced the linear colony growth of fungus as compared to control (82.67 mm). So, we can conclude that for the management of Fusarium wilt of mango nursery the more suitable fungicides are Nativo and Alliete, these chemical fungicides and can manage the disease as well. These studies will be proved fruitful for researchers and growers in future for management of the Fusarium wilt of mango nursery.

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