I would apply for preventive ( once you get any of these disease your fucked and the counter attack protect once you do isn’t worth it, prevention is the key... ) copper ( many brands ) + Regalia ( use up till harvest and use bio insecticides like Grandevo or venerate no prob) after first set of leafs ( every 7-12 days )
than you have some safe systemic protection (12 days ) and another benefit of regalia is it makes your plant a overall happier and vigorous plant . Thus better results
getting the the non cannabis label of regalia is way cheaper (everything from that brand is & it’s 100% % ingredients)
Drench or foliar spray ( I do both ) since your running hydro I would suggest foliar cause that regalia def foams a shit tons and def stains (orangish-brown) , what I would is foliar spray every 7 days to be safe with copper (copper can’t be sprayed past 3-4 week of flower )
Regalia® Bioungicide delivers improved crop yield and harvest quality by stimulating a plant’s ability to fight diseases. Effectively control Powdery mildew.
marronebio.com
Roger that... @ $90 for a quart, it will have to wait until I get paid on Friday. I have isolated the plant to its own cabinet just to be safe.
Thanks for the heads-up guys. That is why i love this site....
p.s. I also removed the leaves with the spots and everything below.
. . .
Septoria Leaf Spot of Tomato
Septoria leaf spot, also called Septoria blight, occurs throughout the United States and worldwide wherever tomatoes are grown. This disease can be quite destructive and crop losses of up to 100% have been reported in heavily defoliated fields. Septoria leaf spot is primarily a disease of tomato, but it has been reported on other Solanaceous hosts including eggplant, potato, petunia, horsenettle, and black nightshade.
SYMPTOMS AND DISEASE DEVELOPMENT:
Septoria leaf spot is caused by the fungus
Septoria lycopersici. This fungus can attack tomatoes at any stage of development, but symptoms usually first appear on the older, lower leaves and stems when plants are setting fruit. Symptoms usually appear on leaves, but can occur on petioles, stems, and the calyx. The first symptoms appear as small, water-soaked, circular spots 1/16 to 1/8" in diameter on the undersides of older leaves. The centers of these spots then turn gray to tan and have a dark-brown margin. The spots are distinctively circular and are often quite numerous. As the spots age, they sometimes enlarge and often coalesce. A diagnostic feature of this disease is the presence of many dark-brown, pimple-like structures called pycnidia (fruiting bodies of the fungus) that are readily visible in the tan centers of the spots. When spots are numerous, affected leaves turn yellow and eventually shrivel up, brown, and drop off. Defoliation usually starts on the oldest leaves and can
quickly spread progressively up the plant toward the new growth. Significant losses can result from early leaf-drop and often leads to the subsequent sunscalding of the fruit when plants are prematurely defoliated.
Septoria leaf spot is favored by warm, wet, humid conditions. Although the fungus can survive in or on seed and in weed hosts, the
main source of inoculum is from leaf fragments and other plant debris from diseased plants that "overwinter" in the soil. Under wet conditions, spores (also called conidia) of the fungus are produced in the pycnidia. These spores are spread to healthy tomato leaves by windblown water, splashing rain, overhead irrigation systems, hands and clothing of pickers, cultivation equipment, and several types of insects such as Colorado potato beetles, flea beetles, tomato worms, and aphids. Following this initial spread and when free moisture is present on the leaves, the spores germinate, infect the tomato tissues, and spots usually appear within 5 days. Pycnidia subsequently develop in these new spots, more spores are produced, secondary cycles of infection begin, and the disease spreads.
MANAGEMENT:
The effects of Septoria leaf spot can be minimized by following a multifaceted approach to disease management that includes sanitary, cultural, and chemical methods. It is
very important to eliminate initial sources of inoculum by removing or destroying as much of the tomato debris as possible after harvest in the fall. Alternatively, in large fields where plant removal is not practical, plant debris can be covered and buried by
deep plowing. These simple sanitary practices can significantly reduce disease development the following year since they remove sources of the fungus that overwinter in the soil. During the growing season, it is important to start with healthy, disease-free transplants. If infected plants are found, . . .
original article =>
https://portal.ct.gov/CAES/Fact-Sheets/Plant-Pathology/Septoria-Leaf-Spot-of-Tomato
