Next generation herbicides: hydrothermal aqueous phase role as a seed germination inhibition


Hydrothermal aqueous phase (HAP) is generated as a co-product in varying amounts — influenced by the reaction time, temperature and pressure of the hydrothermal media. We study and identify novel bioactive compounds that may negatively affect seed germination, root elongation and seed viability, in order to develop a new valuable material for weed control. By understanding the role of reaction temperature and time in the hydrothermal process of sewage sludge, we will be able to select the conditions that allow the highest activity of HAP and therefore, to assimilate sludge treatment as new tool in IWM approaches.

Project led by : Dr. K. Dhamodharan

In collaboration with: Dr. Roy Posmanik

20200203_153735
20191231_135850
20200205_135801
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Exploring the Biology and Phenology of the Invasive Weed Parthenium hysterophorus

In recent years, there has been increasing concern about the spread of the invasive weed Parthenium hysterophorus in agricultural and non-agricultural habitats across Israel. With no control, P. hysterophorus can cause up to 97% yield reduction. Here, we investigate the biology and phenology of this weed and examine the effectiveness of various selective and non-selective herbicides aimed to improve  P. hysterophorus control.

Project led by : Sahar Malka

In collaboration with: Dr. Ran Lati and Professor Hanan Eizenberg

tama
20200213_073122
20200121_093626
20200213_073152

Development of Integrated Management Protocols for swallow-wort (Cynanchum acutum)

Cynanchum acutum is a perennial vine associated with wet habitats and may be found in cultivated fields, orchards, fence rows, natural areas and roadsides. Recently, its range has expanded to the Arava valley, and it has become a pest in the date orchards due to its unique phenological and biological characteristics. The main objective of this proposal is to develop new and effective control options for C. acutum. These control options will set the basis for advanced integrated management protocols in order to achieve maximum control of this weed.

Project led by : Uri Bar

In collaboration with: Dr. Ran Lati, Dr. Malki Spodek, Dr. Jessica Schäckermann and Professor Avraham Gamliel

20200612_152209
20190805_162047
20190805_161300
20190805_150300
20190805_151609
20190730_093741
20190805_103435
20190805_104214

Studying the evolutionary trajectory of Amaranthus tuberculatus and Amaranthus palmeri as noxious invasive weeds

The economically damaging weeds Amaranthus tuberculatus and A. palmeri were both introduced from North America to Israel in the 1960's-70's. Although both species are potentially harmful, A. palmeri has proven to be more damaging and competitive than A. tuberculatus. However, in recent years, A. tuberculatus has emerged as a weed with great agricultural importance. At this point, there is no available data explaining whether a new introduction or the ongoing evolution of a highly adaptive biotype constitutes the reason for this occurrence. Herbicide resistance was also recorded in populations of both species and thus may serve as the reason for the increasing damage of both species in recent years. 

Project led by : Amit Wallach

In collaboration with: Professor Hanan Eizenberg

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Controlling invasive Ambrosia species

Ambrosia species are a perennial invasive weeds, that have invaded Israel  in several occasions. Traditional management of Ambrosia species mainly includes the application of various non-selective herbicides. However, better understanding of the biology and phenology of these weeds may increase herbicide efficacy. The objectives of this research are: to study the biology and phenology of these invasive weeds, and to target more sensitive life stages in order to increase herbicide efficiency.

Project led by : Danielle Vaknin

In collaboration with: Professor Martin Goldway and Professor Hanan Eizenberg

20201029_111443
20201118_090108
20201029_111415

Reuse of dredged riverbed sediments in agricultural fields

During rainfall events, soil particle that erode from the surrounding agricultural fields, eventually deposit in the stream channel. The Purpose of the current project is to investigate the potential reuse of dredged sediments, accumulated in Nahala stream, by means of: (i) assessing the seed bank composition and soil quality of the dredged sediments, (ii) examine different treatment methods (e.g. solarization, co-composting) aimed to reduce seed viability, in order to sustainably implement dredged sediments in the nearby agricultural fields.  

 

Project led by: Smadar Tanner

In collaboration with: Dr. Yael Laor and Dr. Roei egozi

sediments piles
Clod
נחל-נהלל-אווירי
20210519_100932