Mango Shoot Psyllid

Disease

Mango Shoot Psyllid

Apsylla cistellata

insect

In a Nutshell

    Hard, green, cone-shaped galls where buds should formBrown-black ovoid eggs under the leavesDieback and reduced inflorescence and fruit settings

Hosts: %1$s

· Mango

Symptoms

Females lay ovoid, brown-black eggs into the midrib or blade on the underside of leaves during spring. About 200 days after ovoposition, nymphs hatch and crawl to nearest buds and feed on them. The piercing and injection of chemicals into plant tissues while feeding induces the formation of hard, dark green cone-shaped galls in place of the buds. This prevents proper inflorescence and fruit settings. Dieback of infested branches may occur in case of severe infestation. Losses depend on the number of eggs laid and the consequent effect on the inflorescences. Apsylla cistellata reportedly is a serious pest in India and Bangladesh.

Trigger

Adults are 3 to 4 mm long with brownish black heads and thorax, and light brown abdomen and variegated membranous wings. They are inserted by puncturing the tissue along both sides of the midrib or forming a line on the dorsal surface of the leaf. Eggs hatch after about 200 days and early nymphs are yellowish in color. After emergence they crawl to adjacent tender buds to suck cell sap. The chemicals they inject into the plant tissues while feeding induce the formation of green conical galls. There, the nymphs resume a six month-long cycle before reaching adulthood. Emerging adults will fall from the galls to the ground, where they get rid of coat remains. Later on, they climb up the trees to mate and lay eggs.

Biological Control

Application of industrial ashes rich in silicates is recommended. Infected twigs and shoots should be pruned 15-30 cm from the location where disease symptoms appear to significantly reduce the quantity of galls.

Chemical Control

Always consider an integrated approach with preventive measures together with biological treatments if available. Spread the bark with dimethoate paste (0.03%) to decimate the psyllids that are moving up and down the tree. Injection of dimethoate into the bark might also work. At early stages of psyllid infestation, foliar sprays based on phosphamidon, methyl parathion, fenitrothion and monocrotophos (0.04%) also show good results.

Preventive Measures

    Choose resistant varieties, if availableMonitor orchard regularly for psyllid infestationsAvoid excessive fertilizer useWater orchards regularly during the dry season to avoid drought stress




Features

Regional Weather

Get detailed forecast and actual weather data.

Plantix offers detailed weather information on the following issues:

Precipitation

Humidity

Air Pressure

Temperature

Wind speed

Plantix Community

Get in touch with experts around the world.

Post your questions

You can post your questions and pictures and get feedback from other farmers or gardeners. Plantix' experts will answer your questions related to plant diseases and pests.

MyCommunity

Exchange with Plantix users around you, in your language and related to the crops you grow.

Global Community

Connect to farmers, gardeners, experts and interested people around the world that discuss plant diseases, remedies and best practice for sustainable farming.

AI-Driven Disease Detection

Instant diagnostics and solutions based on your picture

Image Recognition

Plantix analyzes your picture within a few seconds and gives you instant feedback on your plant problem.

Customized Management Options

On top of the detection result, Plantix offers you a detailed description of possible solutions - both biological and conventional.

Preventive measures

Plantix offers information on preventive measures to protect your crop from the next attack.