Since this fungus mainly attacks fruit after harvest, the last fungicide spray prior to harvest should be one that includes Rhizopus rot on the label for stone fruit. Rhizopus rot occurs primarily after harvest but may develop on ripe fruit in the garden. It is recommended that in order to save your jackfruit, applications of a broad spectrum copper fungicide spray should be made, according to label directions, shortly after fruit set. However, controlling hail, birds, and insects may be at best difficult, if not impossible. Sweet potatoes are susceptible to a number of diseases during the postharvest storage period and during shipping. Managing Rhizopus Rot of Jackfruit. Rhizopus head rot is directly linked to physical injury of heads, and as a consequence, anything that can be done to minimize head damage is important. Rhizopus fruit rot of jackfruit: (A) infected fruit; (B) infected male flower. Introduction • Jackfruit is a common fruit in our country. When warm, humid, wet weather coincides with the flowering and fruiting season, rhizopus rot can cause total loss of fruit in jackfruit trees. This is as a result of Rhizopus rot which is common in jackfruit. Its scientific name is Artocarpus heterophyllus. Rot is more likely to occur in high-rainfall areas or during and after stormy periods. 4 5. Species of Rhizopus survive on debris in the soil when host plants are not present. The pathogen can produce the enzyme pectinase in appreciable amount. Rhizopus Head Rot Management. [Credits: pestnet.org; Flickr.com] • Two rhizobacteria inhibit pathogen growth remarkably both in vitro and in vivo.. First report of post harvest control of the rot by food grade lactic acid bacteria. 1. Ideally, management of jackfruit rot needs to start in the orchard. The disease is more likely to occur in high-rainfall areas or during and after stormy periods. The jackfruit also known as jack tree, jakfruit, or sometimes simply jack or jak. The most common are Rhizopus soft rot (Rhizopus stolonifer), bacterial soft rot (Erwinia chrysanthemii), Fusarium root rot (Fusarium solani), Fusarium surface rot (Fusarium oxysporum), and black rot (Ceratocystis fimbriata).R. Rhizopus rot progression is temperature related, with optimum temperatures around 80°F. Most jackfruit are bagged in order to reduce attack from insects, but ideally these bags should be porous and should not allow moisture to build up next to the fruit as such conditions encourage the development of the fungal inoculums. Spores are spread by wind and insects, and infection occurs only through wounds in ripe fruit. Background. Managing Rhizopus Rot. * Symptoms Rhizopus rot is a common fungal disease of jackfruit flowers and fruit. When warm, humid, wet weather coincides with the flowering and fruiting season jackfruit can prematurely rot and fall off the tree. Main Disease of the Jackfruit Rhizopus rot Gummosis disease Pink disease 5 6. 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