Citrus Red Mite

Disease

Citrus Red Mite

Panonychus citri

mite

In a Nutshell

    Tiny gray or silvery specks appear on leavesAttacked tissue usually takes on a silvery or bronze appearanceHeavy infestations lead to premature leaf fall, twig dieback, reduced quality of fruits and decreased vigor of the treesA good water supply reduces the incidence and the damage caused by this pest

Hosts: %1$s

· Citrus

Symptoms

The damage is characterized by the appearance on young leaves at the periphery of the tree of tiny gray or silvery specks, a process called stippling. Occasionally, fruits and twigs may also be affected. At high levels of infestation, these specks merge into spots that give the leaf or the green fruit a silvery or bronze appearance. The damage to the leaf tissues reduce the area used for photosynthesis and attacked tissue gradually decay. Premature leaf fall, twig dieback, reduced quality of fruits and decreased vigor of the trees can ensue. This is particularly the case during adverse environmental conditions, for example dry, windy weather. By contrast, a good water supply reduces the incidence and the damage caused by this pest.

Trigger

Symptoms are caused by the feeding activity of the adults and nymphs of the citrus red mite Panonychus citri. They are characterized by a pear-shaped brick-red body and strong white hairs protruding from pearly spots on the back. They infect citrus trees and occasionally also other crops such as papaya, cassava or grapevine. It is found on both surfaces of leaves but appears mostly to feed on the upper surfaces. Thanks to the production of silk thread, it can be easily transported by wind to other trees. Insects and birds are other means of spreading. Infected tools and bad field practices can also propagate the pest to other fields. A good irrigation scheme with an optimal water supply for the trees reduces drastically the incidence and the damage caused by this pest. By contrast, low or high humidity, high wind, drought, or a poorly developed root system can worsen the situation. Optimal conditions for the citrus read mite are 25 °C and 50-70% humidity.

Biological Control

Panonychus citri has a large number of predators and other natural enemies, which is frequently sufficient to control its spread. Several phytoseiid mites (for example Euseius stipulatus) have been used in different countries for the effective control of the citrus red mite, when population numbers are still low. some species of ladybird of the genus Stethorus feed voraciously on the pest. Fungi, and particularly viruses, also play a major role in controlling Panonychus citri populations in the field, something that may be influenced by temperature.

Chemical Control

Always consider an integrated approach with preventive measures together with biological treatments if available. Selective pesticides are highly recommended, as broad-spectrum insecticides may aggravate the situation. For example, synthetic pyrethroids encourage outbreaks of this mite. The use of several types of acaricides avoids the development of resistance.

Preventive Measures

    Monitor the orchards with a lens regularly to assess numbers of mitesAvoid an excessive use of pesticides as this can influence negatively the populations of beneficial insectsWater the tree properly and avoid drought stressAvoid contact of branches with grasses or weeds on the ground




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.