Well, a lot of things can be used against Spider mites,
But first let’s understand why one needs so many things and means.
Spider mites are very small spiders, around 1 millimeter length and reproduce very fast.
Their color is red or yellow and the damage they make can be very big.
They can reach a state of immense quantities.
They are moving between plants, using webs that they produce,
and suck the liquids out of the leaves, leaving them dry.
This can happen in a matter of days if not taken care of.
Spider mites are active on all vegetable crops,
and they develop tolerance to many designated pesticides.
They are not affected at all by many of the pesticides developed at great cost to give a proper solution against them, turning out to be very hard to eradicate.
Use at least 3 kinds of different pesticides, and alternate between them every 3 days,
in order to overcome pest’s resistance, and completely exterminate them.
For further information about this, read this post, and this post also.
There are 3 ways to eliminate spider mites: chemical, organic and biological.
The best pesticides for spider mites,
Chemical active ingredients:
|5. FENBUTATIN OXIDE|
|9. NEEM OIL|
|10. MINERAL OIL|
A naturally occurring pesticide that is found in seeds from the neem tree.
Azadirachtin is the most active component here.
It reduces insect feeding and acts as a repellent.
It also interferes with insect hormone systems, making it harder for insects to grow and lay eggs.
The popular fungicide which controls the fungi named powdery mildew has also an acaricidal effect on spider mites,
adults and eggs.
On average, sulfur reduced mite infestations to low levels within one week of treatment
and eliminate mites as of three weeks post treatment.
It is important to mix the sulfur with water in the amounts indicated on the product label.
Usually mix 4 tablespoons per each 1 gallon of water used.
A collection of six esters, which are found in high concentrations within the achenes of the flower.
It targets insects’ nervous systems.
Pyrethrin induce excited behavior in the insect, which results in increased insect exposure to the pyrethrin and eventual death.
Covers the egg, larva, nymph and adult stages, causing suffocation.
It leaves no toxic residue on plants.
acts as a smothering and prevents insect respiration.
For maximum effectiveness, spray all kinds of oils well
especially on the underside of the leaf.
The foliage of the crop should be well moistened.
Spray in the cool evening hours.
It is recommended to spray two consecutive sprays three days apart.
Phytoseiulus persimillis –
The carnivorous mite Phytoseiulus persimilis, which originates in South America,
serves as an effective natural enemy of spider mites.
The adult female is pear-shaped and orange-reddish in color.
Its main characteristics are: long front legs and rapid movement
especially when exposed to strong light or when its normal activity is disturbed.
The young stages (larvae and nymphs) are oval in shape and pale pink in color.
Its rate of development is almost twice as fast as that of the pest.
It is no wonder, then, that the persimilis mite is considered a particularly effective natural enemy
with an impressive ability to suppress populations of harmful mites.
It’s a great mite predator for spider mites in humid greenhouses, and in dense field crops.
It consumes eggs, nymphs, and adult stages of mites.
Spider mites are killed by being searched by the predatory mites, that suck them dry once found.
Release at first sign of mite infestation.
Once leaf damage is serious, as more than 4 mites per leaf, achieving control is more difficult.
For heavy infestations, remove the most affected parts of the plant.
In which crops are Phytoseiulus persimilis effective?
Tree and shrub nursery
Tomato and Cherry tomato
Sweet pepper and Hot pepper
Melon and Watermelon
Green and Runner bean
Cucumber and Gherkin
Apply mites repeatedly by inverting the bottle, over spider mite-infested leaves.
Each inversion delivers a measured amount of vermiculite.
Tap and roll bottle before re-opening it.
These are live organisms, that are shipped directly from the manufacturer
via fast next day mail delivery, so they do not die during transit.
Biological beneficials have a very short life expectancy and therefore need to be introduced into the crop
as soon as possible after receipt.
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