Authors : Sandip S. Petare, Vaibhavi P. Ughade, Sonali V. Padwad and Ashish D. Tiple
Page Nos : 64-81
Description :
The significant decline in papaya yield is attributed to the widespread occurrence of bacterial canker disease, which is caused by Erwinia species affiliated with the Enterobacteriaceae family and closely linked to carotovora, crysanthemi, as well as cypripedii species. Manifested by water-soaked angular lesions on leaves and stems, bacterial canker is a notable feature. These pathogens, which are temporary inhabitants of the soil, exhibit resilience even at temperatures as low as 28°C. Given the imperative of maximizing yield, effective control measures against the disease are essential. Conventional treatments such as bactericides, antibiotics, and fluorescent pseudomonades have proven ineffective in managing papaya bacterial canker. Consequently, the present investigation employs the well diffusion technique to evaluate the antibacterial properties of leaf and stem extracts derived from Annona squamosa, Punica grantum, Citrus reticulata, Psidium guajava, and Manilkara zapota, extracted in methanol, 50% ethanol, and methanol+chloroform solutions, against bacterial canker. The leaf and stem extracts exhibited substantial growth inhibition zones against Erwinia spp. Given that the selected herbs are widely cultivated cash crops and potential barriers to Erwinia spp. transmission, they offer the prospect of establishing multi-story tree cropping systems that not only enhance economic returns but also contribute to the ecological equilibrium of the environment and optimize the utilization of natural resources available.
