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. Organic fungicides. 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).And observe the number of days between pesticide application and when you can harvest your crop. Be sure that the plant you wish to treat is listed on the label of the pesticide you intend to use. Always follow the pesticide label directions attached to the pesticide container you are using. Rotate fungicide groups and/or tank mix fungicides to avoid producing fungicide-resistant isolates.ĬAUTION: Mention of a pesticide or use of a pesticide label is for educational purposes only. For a current list of fungicides for late blight management visit the Midwest Vegetable Production Guide.Fungicides specific to water molds must be used and applications repeated according to label instructions. Phytophthora infestans is a water mold and not a true fungus.Fungicide applications should be made prior to infection when environmental conditions favor disease to be the most effective. Products are available for management of late blight on tomatoes and potatoes.Under ideal conditions, such as a greenhouse, petunia also may become infected. The host range is typically limited to potato and tomato, but hairy nightshade ( Solanum physalifolium) is a closely related weed that can readily become infected and may contribute to disease spread.Many clonal lineages affect both tomato and potato, but some lineages are specific to one host or the other. These are called clonal lineages and designated by a number code (i.e. There are many different strains of P. ![]() These sporangia easily become air-borne, resulting in prolific spread of the pathogen. infestans can infect and produce thousands of sporangia per lesion in less than five days. Overwintering in a tomato production system is unlikely but infected tomato fruits may give rise to infected volunteer seedlings the following season. infestans can overwinter in Minnesota if protected in potato cull piles. ![]() The most common routes of introduction each season are infected potato seed tubers, infected tomato transplants shipped in from other regions, or windblown sporangia (asexual spores) from the south that then infect fields and circulate locally. ![]() ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |