Abutilon theophrasti a new host for Orobanche aegyptiaca in Israel

EWRS, 2nd International Conference Weed Management in Arid Ecosystems

(Santorini) 2009

T. Yaacoby, Y. Goldwasser, and B. Rubin

R.H. Smith Faculty of Agriculture, Food & EnvironmentThe Hebrew University of Jerusalem, Rehovot 76100, Israel

Abutilon theophrasti a new host for Orobanche aegyptiaca in

Israel

Egyptian broomrape (Orobanche aegyptiaca) parasitizes a broad host rang of agricultural crops:

•Legumes•Solanaceae (eggplant, tomato, tobacco, potato and capsicum peppers)•Umbellifferae (carrot, parsley, celery)•Cruciferae (oil seed rape, cabbage) lettuce•Compositae (sunflower)

In summer 2006 we found that O. aegyptiaca is capable to parasitize Abutilon theophrasti,

a Malvaceae specie never before mentioned as a host in literature

Tomato 2006

Tomato 2006

Maize 2006

Maize 2006

Maize 2006

O. aegyptiaca

From the field to the greenhouse

Abutilon 2007

O. aegyptiaca

on Abutilon theophrasti in green house

2007

O. aegyptiaca

on Tomato2007

Abutilon 2007

Abutilon and tomato 2009

O. aegyptiaca

Same location (2008) - Sunflower infested with A. theophrasti

and O. aegyptiaca

O. aegyptiaca

2008 same location – Watermelon remain infested with

A. theophrasti and O. aegyptiaca

Tabor mountain

August 2008

On summer 2009 we found in Olive orchard with a history of high infestation of

O. aegyptiaca that Malva nicaeensis could be another Malvaceae host too!

O. Aegyptiaca on Solanum nigrum

The ability of O. aegyptiaca to detect, recognize and parasitize A. theophrasti, presents an

immediate threat to other Malvaceae species like cotton, okra and ornamentals belonging to this

botanical family

I cannot read what is written down below…… but, I know how to thank you in Greek!