Managing Tuta absoluta in Agricultural production systems

Adapted from ‘Tomato leaf miner/ American leaf miner management in Agricultural production systems (Distribution, biology, damage and integrated management)’ written by Koppert Biological Systems.

Tuta damage to leaves and fruit
Tuta damage to leaves and fruit

The tomato leaf miner, Tuta absoluta, is a devastating pest of tomato. Originating from Latin America, T. absoluta has spread via infested fruits and packaging material to Europe, North Africa and the Middle East. Given its potential for crop destruction and rapid reproduction, it quickly became a key pest of concern in East Africa. Its primary host is tomato, but it also affects potato, aubergine, beans and others.  Continue reading

South-South collaboration helps in the fight against invasive pests

Tutu absoluta
Tuta absoluta on tomato (Photo credit: Elizabeth Maina)

Invasive species cause widespread devastation and huge economic losses to smallholder farmers across the world, especially in sub-Saharan in Africa. Invasive species not only directly undermine farmer’s ability to achieve food security, they also affect smallholder agribusiness making farmers unable to link to profitable food value chains and international agricultural trade networks.

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Update: New Pest & Disease Records (07 Sep 16)

Tuta absoluta mines through leaves and feed on tomato fruit © Peter Kodwaran, MOALF, Kenya
Tuta absoluta mines through leaves and feeds on tomato fruit © Peter Kodwaran, MOALF, Kenya

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 a new insect pest, Cyrtozemia dispar, on peanut in India, the presence of the entomopathogenic fungus Pandora neoaphidis in Argentina and the first record of Tuta absoluta in Tanzania.

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Surveillance critical to halting deadly tomato pest

By Jackie Opara. Reblogged from SciDev.Net

tuta
© Marja van der Straten/NVWA Plant Protection Service/Bugwood – CC BY-NC 3.0 US

Effective surveillance and integrated pest management could curb the devastating impacts of tomato pest, Tuta absoluta, also called tomato leaf miner, which is ravaging the crop in Nigeria, experts say.

T. absoluta has affected most parts of northern Nigeria tomato farms in Kaduna state, causing a loss of more than 1 billion naira (about US$3.5 million), leading to rising tomato prices, according to the Centre for Agriculture and Biosciences International (CABI) — an organisation working with African governments and research institutions to monitor the spread of the pest.

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Factsheet of the month: August 2015 – Sprays against Tuta tomato leaf miner

20157800364 In recent years, Tuta absoluta has gained a reputation for being one of the most destructive pests of tomato and can cause losses of 80-100% in the field if left unmanaged. Tanzania are feeling the effects of the yield reduction with a 375% increase in the cost of tomatoes in the past 6 months. A carton of tomatoes that cost Sh16,000 ($9.4) in January 2015 now costs around Sh60,000 ($35.3). Vivian Munisi, a trader at Tanzania’s Arusha central market, is just one of the people who are expecting the price of tomatoes to increase further in the coming months as a result of the shortfall caused by T. absoluta. 

The larvae of T. absoluta, which is also known as the tomato leaf miner, bores into leaves and fruit and feeds below their surface, forming mines as they move along the plant. The network of mines produced as a result of this feeding can also serve as an entry point for disease, which can lead to further damage. Although tomato is the main host for the tomato leaf miner, it can also affect potato and other Solanaceae plants. The pest originated in Latin America but has spread to Europe, Asia and more recently, Africa where it has caught smallholder farmers unprepared.

There are a number of management options that will help to reduce the damage caused by the tomato leaf miner.  These include disposing of infested fruit, setting pheromone traps and applying sprays of either biocontrol or a chemical pesticide. To find out more about tomato leaf miners and how these sprays can contribute to their control, read this month’s Plantwise Factsheet for Farmers which was written by an Agriculture Officer from the Ministry of Agriculture, Food Security and Cooperatives (MAFSC) in Tanzania. Tomato production in Tanzania has been badly affected by the tomato leaf miner. Continue reading

Tuta absoluta: combating the tomato leafminer [Video]

A recent IPM workshop in Ethiopia focussed on the tomato leafminer – a pest that causes devastation on tomato crops in Europe, Africa and South America. This video shows how the workshop attendees dedicated their time to finding out more about the pest, seeing it in the field, and working on recommendations for control.

To view factsheets, maps, images and new reports of this pest, visit the Plantwise Knowledge Bank.

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