Alex Ignatov

14 Questions 212 Answers 0 Followers

Questions related from Alex Ignatov

Have you met such symptoms on potato?

Potato plants free of 5 common viruses (PVY, PVX, PVS, PVM, PLRV) have unusual symptoms. What can it be?

04 June 2020 6,854 19 View

Can Tomato yellow leaf curl virus infect brassicas and beets?

It is stated in https://www2.ipm.ucanr.edu/agriculture/tomato/tomato-yellow-leaf-curl/ that TYLCV can infect a wide range of plant species, including peppers (Capsicum annuum), eggplants,...

20 May 2020 1,823 3 View

How we can make plants accumulate Boron in soil with high soluble Ca and low pH?

Low accumulation of Boron (B) cause physiological damage in many plants. High concentration of soluble Ca in soil (over 6 g/kg) and acidic pH (4.5-5) prevent accumulation of B despite sufficient...

24 January 2020 5,244 3 View

What can improve accumulation of Boron (B) by carrots on Ca-rich acidic soil?

Carrot plants suffer from acute B-deficiency (

26 December 2019 6,335 3 View

What would you recommend for genome sequencing of field isolates of potyviruses?

There is a task to identify rapidly current variants of potyviruses in potato and tomato plants. What would yo recommend - NGS or Sanger method to make it faster? If NGS, what method shell we use...

06 October 2019 9,539 2 View

Do you agree that plants created using novel genome editing methods (CRISPRs) must be classed as genetically modified organisms?

The EU Court of Justice has ruled that plants created using novel genome editing methods will be classed as genetically modified organisms and therefore have to follow the strict EU guidelines for...

28 July 2018 3,734 34 View

How would you describe relation between Phytophthora infestans sensitivity to fungicides in plants vs. in vitro?

It is known that many pathogenic/parasitic microbes increase resistance to biocides if penetrate host cell. What would happen with Phytophthora infestans?

20 April 2018 3,954 10 View

Can anybody recognize the black colonies on this plate?

I have isolated from water some strange-looking colonies on YDC medium. In fact they are dark violet. Do you have any idea about taxonomic position of this bacteria?

24 February 2018 7,867 5 View

What is the main mechanism of low-dose microwave effect on organism?

High energy microwave affect iliving beings mainly through termal effect. What is the mechanism of low dose microwave (300 MHz - 300 GHz electromagnetic field) effect on organism: membrane...

17 January 2015 9,629 8 View

Does someone know bacteria causing canker or blight on Physalis leaves?

I have found recently yellow-pigmented bacterium that cause canker of Physalis leaves at 25-30oC and rapid blight at 35oC. This bacterium cause no symptoms but colonyze plant leaves at

28 August 2014 7,015 4 View

What is the potential threat from plant/animal pathogens buried in the permanent frost area?

"The ancient pathogen Pithovirus sibericum (class of giant viruses) was discovered buried 30m down in the frozen ground. The virus infects amoebas. The last time it infected anything was more than...

04 March 2014 3,512 4 View

Does anybody know control measures for Root mat (Agrobacterium bv1) on cucumber?

Agrobacterium bv1 with cucumopine Ri plasmid causes root mat disease of cucumber and tomato in greenhouses. I cannot find any efficient way to reduce the disease on plants and remove the pathogen...

10 February 2014 5,596 14 View

Is where other reports about dual role of bacterial effectors for both T3SS and T4SS besides Andree Hubber et al. 2004?

Andree Hubber (2004) described effector-coding genes with signal aa for both T3SS and T4SS.

23 November 2013 6,334 3 View

Is N-gene of resistance to TMV present in tobacco accession CV-58 (PI 551316 Nicotiana tabacum L. SC 72, NC403)?

Has anybody confirmed presence of N-gene of resistance to TMV in tobacco accession CV-58 (PI 551316 Nicotiana tabacum L. SC 72, NC403, T.W. Graham, J.F. Chaplin, Z.T. Ford, R.E. Currin. 1974....

31 December 1969 2,710 2 View