linerjordan.blogg.se - Early blight on tomatoes ca chua

You may also choose Mancozeb or Maneb, although these have longer wait times before you can harvest tomatoes safely than does chlorothalonil. Some gardeners prefer chemical fungicides, the best of which for tomatoes is chlorothalonil (sold as Fungonil, Daconil, or under other brand names. Or you can treat it organically with a biofungicide like Serenade. You can apply until the leaves are dripping, once a week and after each rain. Treat organically with copper spray, which you can purchase online, at the hardware store, or home improvement center.

Treat it as soon as possible and on a schedule. Once blight is present and progresses, it becomes more resistant to biofungicide and fungicide.Remove and destroy infected leaves (be sure to wash your hands afterwards).The best control measure for tomato blight is prevention (see below).How do you control and treat early blight?.It often strikes after a period of heavy rainfall.

It’s most evident during early- to mid-season.

Fruit can also be affected spots often begin near stem of fruit.

Early blight is marked by tell-tale rings.

Dark, concentric spots (brown to black), ¼ – ½” in diameter, form on lower leaves and stems.

To muddle matters further, early blight is occasionally mistaken for Septoria leaf spot because the two diseases infect tomatoes at the same time.

Early blight’s Latin name is sometimes confused with a form of tomato rot, alternaria, a different tomato problem altogether.

Leaves may drop, leaving fruit open to sunscald.

Early blight (one form of tomato blight) is caused by a fungus, Alternaria solani, which over-winters in the soil and infected plants.

Tomato blight, in its different forms, is a disease that attacks a plant’s foliage, stems, and even fruit.