Are there any studies where Citronella essential oil or any kind of essential oil application on pathogen inoculated seedlings caused leaf scorching?

e.g. high concentrations of SA or interaction with abiotic stress factors and promoting its negative effect? Many authors indicate that SA has a beneficial role in plant-pathogen interactions or exogenous application alleviate the negative effect of salt stress. I'm interested in different roles of SA, what happened with plants when overproduction of SA has taken place (except conversion to less toxic form)? Maybe you know some publications, I have problems with finding. I know that SA can cause oxidative stress, but maybe you can help me more in this area.

How can we determine which pathogen (bacteria, fungi, virus) is responsible for a given plant disease from a phenotypic observation (for example: spots, smudges on leaves) ??

Damaged were beech seedlings planted in the spring 2015. The bark and phloem were damaged mainly shallow, on the several places were feeding spots oval and deeper. The feeding (probably insects) was mainly in the root neck area, but so in higher part of the seedlings, approximately in 20-30 (40) cm above ground. We found in the old German books (Escherich, Altum, Nüsslin), that similar damage was created from European hornet (Vespa crabro).

I work on a pesticide preparation, based on essential oils, and I need to stabilize the solution, for field tests. As it will be used for organic agriculture, the emulsifier must also be produced by organic agriculture. I am about to test soya lecithin and gum arabic. I would like to test 3 or 4 more of them.

I thank you for your help!

Hello,

I need to infect my plants with powdery mildew to check if they become more susceptible to the infection. Currently in my lab, we just drop spores and try to do it as evenly as possible. But I think it should be a more accurate method to infect plants. Do you know any protocols? Also, how do you check the results of the infection? 

Which soybean seedborne Fusarium species can we expect to find in a soybean seed lot? Do we actually know that? Are seedborne Fusarium species plant pathogens?

Is there a way to analyse any possible inhibition effects of one pathogen on the other or possibly any other interactions between them ? e.g. one pathogen might just weaken the plant defenses without causing any symptoms, therefore facilitating easiest infection of the symptom-causing pathogen...

Any ongoing research work on the use of mycoviruses in India for the biocontrol of plant pathogens?

I am using the seaweed extract, extracted by alkaloid method, as a cell treatment. The problem is that although many literatures suggest that it helps the growth, I don't see it on my plant cells. I used different concentrations of it from 0.001 g/ L to 0.5g/L. in higher concentrations it kills the cells and in lower doesn't help? What can I do? is it any suggestion?

best,