weed spider

Remove red spider on our culture

It is one of the most common pests in plantations of cannabis but we can address it in many ways.

The red spider is tiny (measuring 0.5 mm). But it is as small as harmful. It is very difficult to see, so we must be very attentive to our culture. Perhaps, before seeing the arachnid we see the traces it has left in our plant. At first we can see that the leaves or stems have a very small white dots. If the pest is more advanced the leaves lose color and you can even get to fall, when the time comes we will see the fine cobwebs behind the leaves. And if the stage of the pest is very advanced, the leaves are covered full of spider web and the plant dies.

The leaves have a very small white dots and we will see the fine cobwebs behind the leaves

Factors conducive to this plague

A number of causes that can favor the appearance of red spider on our culture must be taken into account. This tiny spider usually occurs when the plant is in an environment of high temperatures and very low humidity. What this bug likes is dry environment and high temperature. Also, if the plant is in a small pot and not watered far the arachnid stay at ease. If we are growing inside, plague can ruin our harvest as the temperature can be higher than outside and, separately, the plant is not in contact (as when abroad) with other insect predators that could kill it and keep safe our plantation.

How to end the plague

When, indeed, we note that our plant was infested with a plague of red spider, we have to quickly find solutions. There are home remedies that can fight these arachnids. We can divide onion skins on the floor of the crop and this food served repellent. Also, you can make tea with water and fern leaves with which to irrigate the crop. They can also be made ​​with infusions of wormwood mixed with sodium silicate which can spray the plant in autumn and spring. Another home remedy is to clean the underside of leaves with a cotton ball soaked in a mixture of alcohol and water (half water and half alcohol), this system may prove more tedious because we must clean sheets every week until the end of culture.

Permanent solutions

If we opt for products hundred percent effective, we can find on the market several solutions that will end the plague of spiders very effectively. The Spidex Phytoseiulus persimilis (against spider mite) : it is a predator for biological control red spider. It is the predator’s used against this pest and an adult is capable of pulling 5 red spiders per day or 20 eggs or larvae. Because of its great capacity for predation eliminates the pest completely. For application must be pest and the humidity should not be too low.

You can also fight against red spider with a natural predator of pests that can be found in the product SPICAL 5000 Amblyseius californicus, is a product containing 5000 larvae of the species Amblyseius Californicus fighting red spider. We can even use it as a preventative though there is no plague.

5000 larvae of the species Amblyseius Californicus

Other organic products we can find is the Swirskimite that is a predator mite that combats (among other pests) to the red spider. The Swirskimite has the peculiarity to appear in envelopes that are hung halfway up the plant. As a preventive method you can hang an envelope plant.

The Red Spider is a biological insecticide that can also be used, is a contact insecticide eliminating insects quickly and also destroys the pest eggs.

A contact insecticide

This product enters the plant through the sap and attacking the hormone systems of insects, breaking the reproductive cycle.

Finally, another very effective product that can be used is the OleatBIO Trabe, a nontoxic and also biological insecticide. Is regulated by European legislation and may be used in organic farming, also has a wide field of application in integrated and conventional agriculture.

By Noelia Jimenez Team Piensa En Verde

The red spider is tiny (measuring 0.5 mm). But it is as small as harmful. It is very difficult to see, so we must be very attentive to our culture.

What Does Marijuana Do to Spiders?

Jason mentioned the other day that he and his wife were watching the new series Orange is the New Black, wherein one of the characters talks about how deer were eating her marijuana plants. The factoid checked out. Deer really are a problem for pot growers because fresh growth on the plants makes an excellent snack.

According to forest rangers who were led to a hilltop grow site by under-the-influence animals in Italy, deer who’ve consumed marijuana plants are “unusually frisky” and “abnormally high-spirited.” This got us wondering what kind of effect marijuana had on other animals.

Cannabinoid receptors have been found in non-human mammals, birds, reptiles, fish and even some invertebrates, so there are plenty of animals that react to marijuana. Most of those reactions aren’t that surprising, or all that interesting, though. Dogs and cats act kind of funny and groggy after eating weed (please don’t feed them your stash, no matter how YouTube famous you want to be, though—the stuff can be toxic to them, especially dogs), and monkeys exposed to THC keep wanting more.

Spiders, though, are infinitely interesting when they get stoned because the effects of the drug are clear in the odd-looking webs they build afterwards.

Getting spiders high for science started in 1948, when German zoologist H.M. Peters got fed up with trying to study web-building behavior in spiders who wouldn’t do him the courtesy of working on his schedule. His garden spiders tended to build their webs between two and five a.m., and he asked his pharmacologist friend P.N. Witt if there might be some chemical stimulant that would coax the spiders into building their webs at a more reasonable time.

Witt tried giving the spiders some amphetamine and, while they kept building at their usual hour (to Peters’ dismay), the two scientists did notice that those webs were more haphazard than normal. Over the next few decades, Witt continued to dose spiders with a smorgasbord of psychoactive substances, including marijuana, LSD, caffeine and mescaline, to see how they reacted. Since spiders can’t use tiny bongs or drink from little mugs, Witt and his team either dissolved the drugs in sugar water or injected them into flies and then fed the spiders with them.

The drugs affected the size and shape of the spiders’ webs, the number of radii and spirals, the regularity of thread placement and other characteristics. By comparing photographs and measurements of normal and “drug webs,” Witt and other researchers could see how the different substances affected different aspects of the web and, by extension, the spiders’ motor skills and behavior.

The line of study didn’t have many practical applications at the time and was eventually discontinued. In 1995, though, NASA repeated some of Witt’s experiments and analyzed the webs with modern statistical tools and image processors. This allowed them to quantify the differences between webs, and they suggested that comparisons like this could be used to test the toxicity of different chemicals on spiders instead of “higher” animals like mice, saving time and money.

What a web they weave

This is your web.

This is your web on drugs.

Specifically, this a web on marijuana. It was made by one of the NASA spiders, which appears to have given up on it halfway through. NASA says the spiders that were given marijuana were easily sidetracked while building and left their webs unfinished.

The spiders on benzedrine, a stimulant also known as “bennies,” weaved their webs energetically, even frantically, but without planning or attention to detail. Their webs were characterized by large gaps.

Caffeinated spiders made smaller, but wider webs, characterized by threads meeting at wide angles, disorganized cells and a lack of the normal “hub and spoke” pattern.

Spiders given the sedative chloral hydrate gave up on their webs even faster than the ones who’d had a little pot.

Finally, spiders given low doses of LSD actually maintained more geometric regularity than they did when they were stone sober.

All images courtesy of NASA.

For a funny take on this experiment, see this video.

According to forest rangers who were led to a hilltop grow site by under-the-influence animals in Italy, deer who’ve consumed marijuana plants are “unusually frisky” and “abnormally high-spirited.” This got us wondering what kind of effect marijuana had on other animals.