Pests & Diseases
As jackfruit has limited commercial production in the United States, research into pests and diseases is ongoing. Longicorn beetles when in the larval stage destroy plant stems, often leading to reduced yields.
Larva from the oriental jackfruit fly can seriously affect trees and fruit, but covering the fruit in protective bags while developing can help protect fruit and control infestations.
Jackfruit is vulnerable to many boring insects such as the spined oak borer, shoot borer, as well as other pests including bud weevils, spittle bugs, mealybugs, scales, thrips, and aphids. Mammals, too, often feed on and destroy fruit, especially civet cats and wild boars in some regions.
Jackfruit trees are at risk of root rot if soil is overly moist for long periods, especially during flooding. Pink rot can be identified by whitish spots developing on branches, eventually expanding to encircle the branch and turning a salmon color.
Stem, fruit, and male inflorescence rot can be destructive to production. These soft rots attack the tree and young fruit preventing maturity and limiting yields at harvest.
Leafspot appears as darkened lesions on leaf surfaces. Other diseases that can disrupt growing and maturity include grey blight, charcoal rot, collar rot, and various types of rust.
Storage & Packaging
Although there has been little research on optimal jackfruit storage or processing, keeping the fruit cool at 52°F and 55°F with a relative humidity of 85 to 95% is recommended. Exposure to ethylene for 24 hours can aid in ripening.
References: California Rare Fruit Growers, Purdue University Extension, UC Davis Postharvest Technology Center, University of California, University of Florida/IFAS Extension, University of Hawaii.