Saturday, November 14, 2009

HELP!!! My plants have some kind of disease?!!?

My verbena and calibrachoa have little white spots ( if you took a pen and dotted a piece of paper, that is what they look like. ) They are all over the foliage. They are young plants, they were starts when I recieved them about 3 weeks ago. I also have been having trouble with botritis on my plants, bacopa mainly. I've sprayed them with a fungicide and cleaned them up, any other suggestions? Oh, the new growth on the cali., and verbena look yellow, I am sure it's not from overwatering , what else could it be? I have good soil that I order in bulk from a local nursury. Over night my plants went from healthy green to yellow, weak, some wilting it's just amazing and frustrating! My helichrysum has some leaves that are turning dark and wilting. I know this is a lot and there are a lot of diseases out there I just feel stuck. I couldn't find any good sites on the internet that offered pics with the disease on annuals. There were a few but not any good. All of my plants are in a greenhouse

HELP!!! My plants have some kind of disease?!!?
Watch how you are watering.


Make sure the water is not touching the foliage as you water and that it is not too cold


Sounds like you have thrips and maybe spidermites.


Yellow foliage- need fertilizer, more iron, check the pH.


Helichrysum sounds like it has gotten too wet or staying too cold.


What is the night temperature? sounds like it got too low


Get a high low thermometer so you know what is going on at night.


Find a way to increase the air circulation in the structure, it will help.


Cornell university has an excellent horticultural site, I use it very often.


Make sure the floor of the greenhouse is clean and the plants are not on the floor.-that is where most problems start.
Reply:The white dots are almost certainly scale insects. They don't move. They build that little white "shelter" over them so they can suck the life out of your plant at their leisure.





Go to your favorite L%26amp;G Center and ask them for Shultz Houseplant Spray. The active ingredient is made from chrysanthemum flowers and it lasts about 6 weeks which should do the trick.





If you want something that is nontoxic get Neem Oil or Horticultural Oil. They kill them by coating them with oil and they suffocate. If you use the oil spray them every 2 weeks for 3 times.





At the end of 6 weeks for either treatment take a cotton ball and lukewarm water and a drop or 2 of detergent and gently wipe off all the dead white spots. They're tough insects but they can be beaten.





*Even if I am wrong about it being scales, which some people think I am (I'm not one of them) the treatment would be the same for mites, thrips, and mealybugs.
Reply:its gonorrhea
Reply:spider mites - you'll see fine webs on leaf stems





mealy bugs - white fuzzy critters that will decimate your plant





Solution for both: Spectracide 3 in 1, HomeyD, Lowz, Wallyworld
Reply:what re those people rambling about? white dots are trips traces - they puncture leaf and leave white dots. they usually affect young plants. unfortunately there is no cure or trips. try vaporizing water around your plants - trips and other insects do not like humid air. yoru air is obviously too dry. and if all your plants are not doing well u re doing smth wrong - either overwatering them, or u just repotted them wrongly, and if your soil is from nursery it doesn't make it perfect either
Reply:it sounds like a mixture of problems, the little dots sounds like red spider mite, they are so small that your unlikely to see one unless you get a good hand lense and look really hard.





yellowing of the leaves could be magnesium or iron deficency





fungul attacks are caused by a lack of air movement





do a ph test of the soil and find out what the reccomended ph range for the plant is.
Reply:go to home depot or Lowe's home store and look in their books on gardening .I used them before for various problems,take a leaf with you to compare

kung fu

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