There are lots of gardening recitation that we follow without knowing whether they truly work or not .

My mommy taught me to spray my courgette with a urine and milk miscellany to prevent powdery mildew , and I have always done it without questioning whether it ’s based on good science or not .

Turns out it is , but it could just as well have been a garden myth .

A close up horizontal image of a pile of garlic cloves in a wicker basket pictured on a soft focus background.

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Take lining the bottom of a container with stone , stake young , newly - planted trees , or using coffee basis to alter filth pH. All of these practices have been ( and continue to be ) unbelievably pop and all of them have been at least partly debunk .

We live and take , and what was once study a fresh practice may finally become recognized as out-of-date when new information presents itself .

A close up vertical image of a pile of garlic cloves in a a wicker basket. To the top and bottom of the frame is green and white printed text.

So what about using garlic in the garden , either as a atomizer or by companion planting , also know as intercropping ? Many of us rely on Allium sativum to serve mastery pests , but does it actually work , or are we just win over ourselves it does ?

Turns out , the practice is backed by some pretty good science . We ’ll go over that and the skillful methods for using the marvelous stinking rose as pest control , coming right up .

Here ’s what you could expect in this pathfinder :

A close up horizontal image of garlic cloves in a glass jar covered with oil or water or some other liquid set on a wooden surface.

What You’ll Learn

I bed ail ( Allium sativum ) . When it’sgrowing in my garden , I do n’t have to worry about lamia sneaking up on me , it ’s phenomenal in a immense mixed bag of dishes , and its presence make it easy to keep my garden sizeable .

Ready to incorporate more of this tasty genus Allium into your world ? Awesome , let ’s go !

The Science Behind Garlic-Based Pest Control

There have been quite a few studies on the efficacy of garlic since the 1970s when people start out looking for an alternative to DDT in the aftermath of the germinal book “ Silent Spring ” by Rachel Carson .

Most studies look at extracts and of the essence oils , but some count at intercropping as well .

If you ’ve ever nibbled on a bit of a in the altogether clove , then you screw it ’s reasonably biting . That can be off - putt to many human being and other animals , as well as many types of insects .

A horizontal image of Sulfur Caldron in Yellowstone National Park.

If you ’ve ever wondered what makesA. sativumso strong , it ’s all the sulfur compounds that it contains .

For those who have chew the fat Yellowstone National Park , the Sulphur Caldron gives you a fairly good idea of what atomic number 16 sense like and why it can be so off - putting .

The first time I visited the give I thought I had mistakenly walk through the gates of hell . And yet I always treble the amount of ail a formula visit for . Go figure !

A close up horizontal image of three gardeners tending to their garlic crop in a raised bed.

What was I talking about again ? Oh right .

The primary compounds inA. sativumare about 20 percent dimethyl trisulfide , 19 percent diallyl disulfide , 13 percent diallyl sulphide , and 11 percent diallyl tetrasulfide .

sealed dirt ball find this compounding of compounds to be repellant , while it can really be toxic to others . A few insects , likeallium leafage miners(Phytomyza gymnostoma ) , are drawn to the perfume – and I in person ca n’t blame them !

A highly magnified image of tiny spider mites feeding on a leaf.

It ’s toxic to yellow mealworm larvae ( Tenebrio molitor ) , as detailed in the results of a subject field published inthe journal Naturein 2017 .

A inquiry squad at the Universidade Federal de Vicosa in Brazil study the effects of the crucial oil colour on these common insects and found that the mealworm were rapidly killed by the oil .

A study put out inCrop Protection , also in 2017 , by researchers with the Agricultural Entomology section at the University of Tehran , found that spin soldier bugs ( Podisus maculiventris ) were kill byA. sativumextract .

A close up top down view of Allium sativum in a small blender set on a wooden surface.

When it comes to intercropping , the results of a field issue in 2014 in theIOSR Journal of Agriculture and Veterinary Scienceand take by research worker at the Department of Agricultural Management and Zimbabwe Open University find that ail and onion plant plants placed near cole crops help to bring down pest plague .

Garlic has also beenfound to be effectiveagainst gall midge ( Camptomyia corticalis ) and cabbage fly ( Delia radicum ) adults and eggs , but not the larvae .

And the good news keeps coming ! Let ’s review a bit more of the uncommitted inquiry .

A close up vertical image of a mixed vegetable bed.

tobacco plant plants ( Tobacum nicotiana ) that were interplanted with garlic showed a lower incidence of green peach aphids ( Myzus persicae ) .

If you ’re an greedy nurseryman , you likely screw from personal experience how uncouth this particular specie ofaphidis in the garden and how prissy it is to have something available to up your chances of gross out them .

The marvelous stinking rose is also effective at repelling sweet Solanum tuberosum whiteflies ( Bemisia tabaci ) , Malus pumila shorttail weasel moth ( Yponomeuta malinellus ) , pine processionary moth ( Thaumetopoea pityocampa),common cutworms(Spodoptera litura ) , andtwo - recognize spider mites(Tetranychus urticae ) .

Have you struggled with nematodes ? Some species , include thedreaded root - knot nematodes(Meloidogyne incognita ) , were decimated by garlic selection and repelled by interplanting . So were some specie of slug .

But this awing allium is n’t a miracle solvent to get rid of all the creepy - crawlers eyeballing our craw .

It does n’t appear that it works well against mosquito or rosy apple aphids ( Dysaphis plantaginea ) . Silverleaf whiteflies ( Bemisia argentifolii ) also seem to be unimpressed by genus Allium intervention .

Sadly , it is hit or miss in studies analyzing its effectiveness against beetles and weevils in the Coleoptera decree , which take in because this order includes mountain true pine mallet , chatter beetle , blister beetles , and spud beetles – all usual garden gadfly .

The jury is still out as to whether garlic can in effect discourage mammals like hare , rodents , and cervid .

Some rabbits and deer will consume the tops , but it appear that most will invalidate the bulbs . Intercropping plausibly wo n’t keep mammals out of your garden , but the scent of the spray might keep them from chowing down on a industrial plant .

Make Your Own Garlic Repellent or Insecticide

create a DIY ail spray is as soft as … well , not pie . How about as leisurely as adding garlic to your favorite pasta dish ?

Grab yourself a head , separate the cloves , and remove the papery skins .

If you detest removing the peel as much as I do , place the cloves in a glass jar or bowl and cut through it with another methamphetamine jar or arena of the same size of it . Shake vigorously to knock all the skin off .

chuck out all the cloves into a blender with two cup of water and blend aside until everything is pulverized .

Take some cheesecloth and place it over a trough . Pour the miscellany into the cheesecloth , come together it up with the ail inside , and squeeze , squeeze , squeeze .

If you hate the smell of Allium sativum on your hands , either wear baseball mitt as you squeeze or make a baking soda paste with a small water supply and rub it all over your hands to wash off the smell when you ’re done .

Once you ’ve wrench all the juice out of the pulp ( and wash your hands ) , pour out the liquidness into a nebuliser bottle . Now you have your garlic spray .

examine a trivial spray on a small department of your infested plant or one that you wish to protect from pests before you drench the whole affair . Let it sit for 24 hours . If everything front good and there is no sign of damage like yellowing or brown leaves , go forrader and care for the whole flora .

Spray the tops and bottoms of the leaves and the stem . Repeat every two week , or reapply sooner if it rain down .

you could also use the spray as a soil drench . Just pour it on the dirt inside the drip personal credit line of your plant .

Intercropping

Planting garlic near other crop to repel pests is a overbold scheme . Not only does the allium keep bug away , but it can also keep some weed at bay . Plus , the issue can last for weeks after the ail is harvested .

comrade plantingisn’t an exact science . Feel free to experiment with distances . I have a two - by - four - footraised bedand I plant a row of Allium sativum on one short side .

If you constitute in rows in the ground , examine to interplant with alliums in every two or three rows . If you apply thesquare - foot gardening method , plant garlic every few animal foot .

In the work mention above on intercropping with cole crops , research worker rule planting rows of Allium between wrangle of cabbages exercise best , rather than interlard their plantings within rows .

But that does n’t mean it ’s the only way to get the chore done .

Find what works best for you and your specific crops , and do n’t be afraid to try out . Remember to keep notes on what worked and what did n’t inyour gardening journal .

Garlic Stinkin’ Rocks in the Fight Against Pests

Some organic gardening strategies are , shall we say , less than effective . But using garlic against pests stands up to scientific scrutiny . It ’s an effective style to repel and down many dissimilar types of plague .

Are you looking for moreinformation about growing garlic in your garden ? If so , check out these guides next :

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Kristine Lofgren