Dear Seco,

I am sure, Phytophthora infestans is associated with tomato while for eggplant (fruit rot) it is Phytophthora capscici is. But, always keep it in mind that, Phtophthora species are changing their behavior with respect to their pathogenecity, vegetative structure, fruiting bodies and reproduction. New pathotypes are designated from various regions and they vary from region to region (with respect to geographical region). If you could able to isolate and conduct further molecular studies on Phytophthora species, you may get predefined pathotypes on both tomato as well as eggplant and new pathotypes may emerge from your region if carefully analyzed using molecular tools available.

Best of Luck

Regards

Mahadevakumar

Hi Mari,

To my knowldge tomato and eggplants, as most of the Solanaceous plants, are affected by both Phytophthora infestans (Late blight) and  P. capsici (fruit rot). I know of these species as they often lead to severe yield losses although I do not exclude that there might be other Phytophthora that could cause disease but not economically important.

Phytophthora capsici.

http://edis.ifas.ufl.edu/vh045

Hello Mari,

The most probable Phytophthora spp. for tomato would be-- (i) P. infestans, (ii) P. capsici and (iii) P. nicotianae while for eggplant --(i) P. nicotianae. But this can vary from region to region. You might also get different results than above.

Even if there are prior reports of Phytophthora spp. affecting tomato and eggplants from your region, a survey of pathogen population from different locations in your region would be the best way to be sure of the Phytophthora spp. affecting these two crops in your region. The best way to identify would be to supplement the morphological characters with molecular identification methods which are readily available.

Best

SGR

Dear Mari,

In his book 'Les maladies de la Tomate' (now transated into English and Spanish), Dominique Blancard cites as pathogens on tomato:

1) causing damping off and root rots

* Phytophthora nicotianae (aka Phytophthora parasitica nicotianae) as the most widespread  worldwide;

* P. cryptogea, described in several countries on tomato roots, especially at the young stages;

* P. capsici,

* P areacae (= P. palmivora), mentionned in the Netherlands in the 1960s,

* P. citricola, held responsible for plantlet wilting and collar rot on young plants in Italy in 1960;

* P. mexicana, mainly responsible for fruit lesions but also root rot and damping offs,

* P erythroseptica, reported from rotted plants in or off soil in Australia and Bulgaria;

* occasionaly, P. cactorum and P. dreschleri have also been reported from tomato.

> on leaves and fruits

* Phytophthora infestans and Phytophthora nicotianae.

Regarding eggplant, I don't know exactly which Phytophthora species are reported. Only thing I can say : I never received any sample of P. infestans from eggplants in the 25 yrs I 've worked with this pathogen so far - but we haven't scouted eggplant crops for it either...

All the best

Didier

Thank you for all the answers! This will indeed help in my study. 

Dejar Mari, please see:

http://onlinelibrary.wiley.com/doi/10.1111/j.1364-3703.2011.00754.x/full

Article Reaction of Certain Solanaceous and Asteraceous Plant Specie...

Article Phytophthora capsici on Vegetable Crops: Research Progress a...

Article Advances in Research on Phytophthora capsici on Vegetable Cr...

Article Genetic Diversity, Population Structure, and Resistance to P...

http://www.plantpathologyquarantine.org/pdf/PPQ_2_2_8.pdf

@ Mari Neila Seco

Please also take a look at the following links.

Article Isolation, identification of Phytophthora nicotianae var. pa...

Article Buckeye Rot of Tomato Caused by Phytophthora capsici in Mich...

Article An emerging threat of Phytophthora infestans causing late bl...

Article Incidence of Phytophthora infestans (Mont.) de Bary on potat...

Article Potato and tomato late blight caused by Phytophthora infesta...

Article First Report of Root Rot of Tomato Caused by Phytophthora sy...

Article Phytophthora Erythroseptica Causing Wilting and Stunting of Tomato.

https://www.ctahr.hawaii.edu/oc/freepubs/pdf/PD-45.pdf

https://edepot.wur.nl/193819

http://www.globalsciencebooks.info/Online/GSBOnline/images/0812/EJPSB_2(SI1)/EJPSB_2(SI1)106-124o.pdf

Thanks!