Tuta absoluta yet another invader at the Tanzanian doorstep - - PowerPoint PPT Presentation

tuta absoluta yet another invader at the tanzanian
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Tuta absoluta yet another invader at the Tanzanian doorstep - - PowerPoint PPT Presentation

Tuta absoluta yet another invader at the Tanzanian doorstep Mwatawala, M.W. Associate Professor Department of Crop Science and Production Sokoine University of Agriculture , Tanzania. Tuta absoluta : meeting the challenge of the tomato


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Tuta absoluta yet another invader at the Tanzanian doorstep

Mwatawala, M.W. Associate Professor

Department of Crop Science and Production Sokoine University of Agriculture , Tanzania. Tuta absoluta: meeting the challenge of the tomato

  • leafminer. Intercontinetal Hotel, Addis Ababa, Ethiopia,

November 26-28th, 2013

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The IPM CRSP Tanzanian Team

  • Prof A. Maerere – Horticulture – Team Leader
  • Prof K.P. Sibuga – Weed Science/agronomy
  • Prof M. Mwatawala – Entomologist
  • Dr D. P. Mamiro – plant pathology
  • Dr R.E. Mgembe – Horticulture
  • Dr C. Msuya-Bengesi - Extension
  • Mr H. Mtui – Horticulture/PhD student
  • Dr K. Mwajombe – Extension
  • Mr Fred Magina – Entomologist, TaCRI
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IPM CRSP activities on tomato

  • The effect of postharvest treatments on tomato shelf life

The effect of varieties and chlorine concentration levels on tomato fruit shelf life

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IPM CRSP activities on tomato

  • Tomato production under open field and high tunnel

growth conditions

Disease incidence values for different varieties grown in open field and high tunnel

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IPM CRSP activities on tomato

  • Tomato production under open field and high tunnel

growth conditions

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  • Tanzania has recorded

a number of invasive insect pest species, some of which are associated with tomato

  • Pests from Genus

Bactrocera have been recorded in tomato and other Solanaceous hosts

Pest invasions w ith im plications of tom ato and other Solanaceae

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  • The melon fly Bactrocera

cucurbitae was recorded in Tanzania centuries ago, attacking mostly cucurbitaceous plants.

  • However, farmers in

Northern Tanzania, have recently reported losses due to B. cucurbitae in tomato

I nvaders ….. Tephritids

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  • In 2004, the invasive Bactrocera invadens was reported from

Tanzania in 2004. The host range of this species include solanaceous hosts like egg plant, African egg plant and black nightshade.

  • Application of pesticides in tomato may have limited

detection of this pest in tomato.

I nvaders … Tephritids

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  • In 2006, the invasive

Bactrocera latifrons was recorded in Tanzania. Detection surveys were conducted in 2007 by trapping and sampling solanaceous hosts along major highways

  • Positive hosts include

tomato, African egg plant and black nightshade

I nvaders …. Tephritids

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  • B. Latifrons distribution in Tanzania

I nvaders …… Tephritids

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  • Phyllonorycter mwatawalai

and P. maererei are among the microlepids recently described from Tanzania

  • Distribution and host range

these species is not well known, could include tomato.

New discoveries …… Microlepids

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Threats …. Tuta absoluta

  • The tomato leaf

miner, Tuta absoluta (Meyrick), is reported to be a serious pest of tomato and other solanaceous crops.

  • This pest may

cause lossess as high as 80-100% in tomato.

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The porous nature of the borders and cross border inter – relationships and migrations Tanzania borders 8 countries in the mainland: Kenya, Uganda, Rwanda, Burundi, DRC, Malawi, Zambia and Mozambique

Threats …. Tuta absoluta

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Lack of strong quarantine regulations or poor enforcement of available regulations as well unstable security in some African countries

Threats …. Tuta absoluta

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Widespread availability and abundance of suitable hosts especially in the non – agricultural settings

Threats …. Tuta absoluta

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  • Chances for introduction and establishment of the

pest are very high

  • Activate surveillance program for this pest have to

be activated

  • Conduct awareness campaigns involving tomato

farmers

  • Nature of East African borders requires

harmonisation of quarantine regulations

Threats …. Tuta absoluta

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The end

Thanks to IPM CRSP, VirginiaTech, Ethiopian Agricultural Research Institute, USAID