Sick lemon tree
- Thread starter athainat
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Greetings, welcome to the Forums.
The shots are a bit blurry, but this looks like Thrips (Thysanoptera) damage. If possible, go in and try to take some zoomed-in macro shots of the damage on flat leaf surface. Also examine the leaves for actual thrips and photograph them, if seen.
What is the culture and growing conditions for this Citrus tree? Is it growing in full sun? Thrips are often more of a problem on plants that are stressed or poorly grown.
For control of thrips begin with improved care and biological control agents. Nextm try horticultural oil or insecticidal soaps.
There are insecticides that can control thrips, but sometimes use of such insecticides can lead to pesticide resistance or pesticide-induced hormoligosis, which can make matters worse.
Some relatively environmentally friendly insecticides include Spinosad and Veratran D,. Consider using them first, if they are available in New Zealand.
The shots are a bit blurry, but this looks like Thrips (Thysanoptera) damage. If possible, go in and try to take some zoomed-in macro shots of the damage on flat leaf surface. Also examine the leaves for actual thrips and photograph them, if seen.
What is the culture and growing conditions for this Citrus tree? Is it growing in full sun? Thrips are often more of a problem on plants that are stressed or poorly grown.
For control of thrips begin with improved care and biological control agents. Nextm try horticultural oil or insecticidal soaps.
There are insecticides that can control thrips, but sometimes use of such insecticides can lead to pesticide resistance or pesticide-induced hormoligosis, which can make matters worse.
Some relatively environmentally friendly insecticides include Spinosad and Veratran D,. Consider using them first, if they are available in New Zealand.
I am sending new pictures of the leafes
I hope that you can find what is it and help me how can I save the tree
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Thank you for the clear photos. I am not seeing actual thrips on the leaf, but that might just mean they jumped 'ship', perhaps when the leaf was picked... Hmm, thrips are small, but the do have a distinctive shape. Examine some leaves on the tree, maybe you'll find thrips.
Spider mite damage can look similar, and the leaves usually show little or none of that black frass that thrips often leave.
Also, there is an odd, green, scaly texture to the leaf, that could be something like a Scale insect... though it doesn't really look like that either.
Perhaps, this is something found in New Zealand that is somewhat different from pests found elsewhere.
Spider mite damage can look similar, and the leaves usually show little or none of that black frass that thrips often leave.
Also, there is an odd, green, scaly texture to the leaf, that could be something like a Scale insect... though it doesn't really look like that either.
Perhaps, this is something found in New Zealand that is somewhat different from pests found elsewhere.
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How can I save this tree.
It has a lot of fruits.
Can any one tell me if there is a spray which can treat this disease?
If you want to begin a treatment right away, first try a horticultural oil, but it is still a good idea to fully identify the pest.
Visit a local full-service retail nursery or garden center bring leaf samples and speak to the horticulturalists there. The may be familiar with this exact pest. It certainly looks like thrips damage but best to double-check.
Visit a local full-service retail nursery or garden center bring leaf samples and speak to the horticulturalists there. The may be familiar with this exact pest. It certainly looks like thrips damage but best to double-check.
Thank you very much for your reply
I will consult a garden center and take advice from them and will let you know