When Do Persimmons Ripe?
In Japan, persimmon trees grow from late spring until early summer. They have a short life span and they are not very productive during this period. However, if you live in a warm climate, then it might be better than other types of fruit such as peaches or nectarines.
The best time to pick persimmons is between April and June (depending on your location). If you want to pick them earlier, then you need to wait until July.
If you don’t like waiting, then there are several methods to get rid of the pesky pests that cause the pest problem. One method is using pesticides. Another way is to use insecticides and fungicide.
Insecticides kill off the insects that attack the persimmons while fungicide kills off any bugs that may be growing inside the persimmon trees.
There are many different kinds of pesticides that can be used to control the pests. Some of these include:
Bacillus thuringiensis (Bt) pesticide – Bt is a naturally occurring bacterium that produces toxins which are toxic to certain insects. These poisons have been tested successfully against various pests including aphids, scale, thrips and whiteflies.
Bifenthrin pesticide – Bifenthrin is a man-made pyrethroid. It is an effective contact poison and it is also toxic to the honeybee after several treatments.
Carbaryl pesticide – Carbaryl, which is also called Sevin, prevents the victim’s nerve cells from functioning, and eventually paralysis and death will occur. It can also be used to kill off weeds and pests.
Imitiaz pesticide – Imitiaz is an insecticide that prevents the proper formation of chitin, which is the material that forms an insect’s exoskeleton. In a way, you can consider it a type of shell.
Malathion pesticide – Malathion works by attacking and damaging the nervous system, specifically the peripheral nerves. It also affects how the brain uses neurotransmitters.
Permethrin pesticide – This is another popular type of insecticide. It prevents the closing of the sodium channels in nerve cells which makes the victim’s channels remain open. This leads to uncontrollable muscle contractions and paralysis.
Pyrethrum pesticide – Pyrethrum can be extracted from chrysanthemum flowers, among other things. It is highly toxic to the nervous system and it also affects the victim’s ability to attack and defend itself.
Spinosad pesticide – This particular toxin affects the insect’s brain by changing how it functions. This causes paralysis and eventual death.
Zeta-cypermethrin pesticide – This is another common insecticide that prevents the proper forming of chitin. The unique thing about this insecticide is that it works even on resistant strains of insects.
If you want to control the population of these insects, then you need to apply pesticides monthly. To maintain a healthy tree, you need to apply it every two weeks.
Insecticides and Fungicides
Aside from dealing with the bugs themselves, you also get various types of molds and fungi that infest your trees. The first type of mold is known as black spot. This fungus tends to create blackish marks on the body of the leaves, mainly on the upper side.
The second type of mold is called grey mold. This fungus creates a dense, ash-colored furry mold. A third type of mold is known as pink mold. This mold turns the leaves into a pinkish color and it also curdles the edges of the leaves.
In order to prevent these molds and fungi from infecting the tree, you should use fungicides. Just like the pesticides, there are various types of fungicides. We have:
Bordeaux mixture – Bordeaux mixture is a type of fungicide made from water, copper sulfate and slaked lime. It is mainly used on grapes, but it can be used on other fruits and plants as well.
Copper sulfate – This is one of the oldest types of fungicides. It is widely used on a variety of crops including wheat, corn, fruits and vegetables.
Mancozeb – This is a mixture of two fungicides that are zinc salt of 2-isobutylphenol and the ethylene glycol bis (methylene dithiol carbamate). The first part attacks the development of the fungus’ body and the second part attacks the cell membranes.
Sources & references used in this article:
Nutritional composition of ten persimmon cultivars in the “ready-to-eat crisp” stage. Effect of deastringency treatment by P Novillo, C Besada, L Tian, A Bermejo… – Food and Nutrition …, 2015 – redivia.gva.es
Persimmon cv. Hachiya (Diospyros kaki Thunb.) fruit: some physical, chemical and nutritional properties by A Celik, S Ercisli – International Journal of Food Sciences and …, 2008 – Taylor & Francis
Persimmons by L Stein, M Nesbitt, J Kamas – Extension Fruit Specialists. The …, 2013 – counties.agrilife.org