Citrus greening detected in Trinidad

Fruit affected by Huanglongbing
Fruit affected by Huanglongbing (USDA)

Huanglongbing (HLB), also known as Citrus greening, has been confirmed in Trinidad for the first time. The disease, which was detected on leaves from a lime tree in the north of the island, can cause devastating yield loss for Citrus growers and is regarded as one of the most important threats to global commercial and sustainable citrus production.  Continue reading

Update: Plant Health News (06 Apr 16)

Diaphorina citri, one of the major vectors of HLB in Colombia (David Hall - USDA ARS)
Diaphorina citri, one of the major vectors of HLB in Colombia (David Hall – USDA ARS)

Here’s a taste of some of the latest stories about plant health, including HLB infected insects identified in Colombia, a new millet variety introduced in Rwanda and a new video to teach farmers in Kenya about drought-tolerant maize.

Click on the link to read more of the latest plant health news!

Continue reading

Update: Plant Health News (03 Feb 16)

Huanglongbing can be fatal for citrus trees (Source:USDA)
Huanglongbing can be fatal for citrus trees (Source:USDA)

Here’s a taste of some of the latest stories about plant health, including the new parasitic wasp that can detect aphid infestation, the effect that El Niño will have on avocado in Peru and the threat of Huanglongbing (HLB) on agriculture in Colombia.

Click on the link to read more of the latest plant health news!

Continue reading

Update: New Pest & Disease Records (11 Jun 14)

Fusarium oxysporum f. sp. cubense tropical race 4, associated with Panama wilt, has been identified outside Southeast Asia © Scot Nelson (CC BY-SA)
Fusarium oxysporum f. sp. cubense TR4, has been identified outside Southeast Asia © Scot Nelson (CC BY-SA)

We’ve selected a few of the latest new geographic, host and species records for plant pests and diseases from CAB Abstracts. Records this fortnight include Phytophthora cinnamomi in the rhizosphere of agricultural crops in southern Bahia (Brazil),  the first report of Fusarium oxysporum f. sp. cubense tropical race 4 associated with Panama disease of banana outside Southeast Asia and the first report of ‘Candidatus Liberibacter asiaticus’ associated with Huanglongbing on Persian lime in Martinique and Guadeloupe.

Continue reading

Update: Plant Health News (31 Jul 13)

Phythophthora sojae causes root and stem rot of soybean © Daren Mueller, Iowa State University (CC BY-NC)
Phythophthora sojae causes root and stem rot of soybean © Daren Mueller, Iowa State University (CC BY-NC)

Here’s a taste of some of the latest stories about plant health, including reports of citrus greening (huanglongbing) in Paraguay, the discovery of genes resistant to Phytophthora sojae in soybeans and a computer model that gives early warning signs of crop failure.

Click on the link to read more of the latest plant health news!
Continue reading

Is citrus greening coming your way?

Mexico is the latest to succumb to the inevitable spread and establishment of huanglongbing (HLB) – the devastating disease of citrus crops. Mexican authorities in the states of Jalisco, Michoacán and Colima have warned growers that HLB – otherwise known as citrus greening – is here to stay.

HLB was first detected in Mexico in July 2009 and it’s clear now that it won’t be going away. Some estimates suggest HLB could affect 60% of Mexico’s citrus industry, an industry which provides employment for 70,000 farmers. SENASICA, the National Service for Animal and Plant Health, Food Safety and Quality, has invested over US$20 million to control the disease. An economic impact assessment report prepared this year by consultants specializing in the economics and finance of plant health programmes indicated total losses to the Mexican economy could amount to almost $7000 million.

Mexico’s not the first to report the alarming consequences of HLB infection. The disease has been known in Brazil for some years and is spreading throughout the region. Florida first reported the disease over 5 years ago and data from 2010 showed 18% of trees in Florida are infected – for more information on the disease in Florida click here. HLB was first reported in Nicaragua and Honduras in 2010 and in Costa Rica in February this year. A recent outbreak in the Dominican Republic is said to have destroyed 34,000 trees and left 5000 unemployed.
Continue reading

California on alert against citrus psyllid

 The detection of the Asian citrus psyllid (Diaphorina citri) in a citrus grove in Ventura County, California, has set alarm bells ringing in the Californian citrus industry, and led to the imposition of a quarantine in the County just as the citrus harvest was getting under way. The psyllid, now found throughout Florida and present in a number of other U.S. states, is a serious pest of citrus, and is the primary vector for citrus greening (also called Huanglongbing or HLB), one of the more serious diseases of these fruit crops. All citrus and closely related species are susceptible hosts for both the insect and the disease, and there is no cure once a tree is infected with HLB.

Continue reading