Marigold to thwart green hornworm?
 

I've read marigold is good to plant with toms to hopefully prevent green hormworms (ooops..I mean tomato hormworm). Anyone doing this? I am planning to. What I'm wondering, though, is -- should I use tagetes (I have some seedlings) or just any ole marigold I can get?

Babice,
I had also heard this...then by accident started researching marigolds and to my surprise found more negative literature regarding them attracting mites. From what I could find the negatives far outweighed the positives. So i've decided to remove the 6 that I planted near my tomatoes.

[QUOTE=Crandrew;273298]Babice,
I had also heard this...then by accident started researching marigolds and to my surprise found more negative literature regarding them attracting mites. From what I could find the negatives far outweighed the positives. So i've decided to remove the 6 that I planted near my tomatoes.[/QUOTE]

Hmmm...I planted them last year with my 6 toms that I had in the ground and to my knowledge didn't have the tomato hornworms nor the mites. But I was such a newbie (and not aware of this site!) that I might not have known? That's why I was going to do it again but am having a hard time figuring out if there's a specific kind more recommended than others.

I suppose I could just use BT preventatively like I see peeps discussing in this forum. Ugh - I totally don't want to see one of those nasty t.hworms but EVEN MORE don't want one munching away on my toms! I do remember last year having something that my friend at the nursery thought was potato beetle but: (1) I don't think it had as many stripes as I've seen in pics of the potato beetle and (2) I really thought those were actually all over the tomatillos I grew last year (I'm not growing any this year). Obviously I don't want to use any pesticides. BT is organic, right?

My very limited knowledge of companion plants -
Borage and Basil to deter hormworms, Petunias to attract them.
The point of attracting them is of course is so you can lure them away from the tomatoes and then "deal with them" as you see fit.:D

I am trying it this year!

Last year I picked over 100 hornworms off from three measly tomato plants. The kids and I kept track because I was obssesive about checking my plants. I kept a bucket of soapy water next to the plants and changed it everyday.

Yes my understanding is BT is organic. I have BT ready to go soon, and im not sure whether to remove the marigolds. I need Ami or Raybo or some of the pros to comment.

I found two blurbs on Marigolds -
"Marigolds help deter harmful nematodes from attacking tomatoes. The pungent odor can also help confuse other insect pests. To deter nematodes, the best practice is to grow the marigolds, then chop and till them into the soil at the end of the season."

"The marigold is probably the most well known plant for repelling insects. French marigolds repel whiteflies and kill bad nematodes. Mexican marigolds are said to offend a host of destructive insects and wild rabbits as well. If you choose marigolds for your garden they must be scented to work as a repellant. And while this plant drives away many bad bugs, it also attracts spider mites and snails."

I can attest to it attracting snails. From my research on the boards, they helped cause huge mite infestations.

Pretty good list of companions here
[url]http://www.gardentoad.com/companionplants.html[/url]

Nasturtiums seem to get high marks as well.
[url]http://igrowveg.com/2010/07/5-reasons-why-you-should-grow-nasturtiums-near-vegetables/[/url]

[QUOTE=JamesL;273308]My very limited knowledge of companion plants -
Borage and Basil to deter hormworms, Petunias to attract them.
The point of attracting them is of course is so you can lure them away from the tomatoes and then "deal with them" as you see fit.:D[/QUOTE]

I've heard they really prefer datura over tomatoes. Haven't tried it yet.
BT is easy and organic.
I would like to grow datura sometime, although kept away from the dogs, of course. Very toxic, along with brugsmania. ( Angels Trumpet)

I went back to where I read this and am both clearer on things and more confused at the same time. So - where I read this (my companion planting book [I]Carrots Love Tomatoes[/I]) actually specifies [I][U]pot marigold[/U][/I] which it says deters tomato hormworm (among others) and it lists [I][U]marigold[/U][/I] separately which it says deters nematodes (also among others). So, then of course I searched for the difference between these two. The [I][U]pot marigold[/U][/I] is apparently the same as calendula; yet, although it's recommended in this book as deterring tomato hornwoom one site I read said not to plant it near vegetables because calendula is used by larvae of species such as cabbage moth.

Then there's this old t-ville thread (link below) I found where some folks (looks to me mostly by folks in the warmer states) warn against using [I][U]marigolds[/U][/I] because they attract spider mites. The last poster in that thread seems to say that it's the [I]marigold[/I] that might do this (i.e. the tagetes) versus the [I]pot marigold[/I] (i.e. the calendula).

[URL]http://www.tomatoville.com/showthread.php?t=14002[/URL]

SO - well - yes, rather confusing. I do have tagetes seeds which I planted up front by my roses. I won't plant any tagetes in with the toms. But at this point I guess I won't bother trying to find calendula either. (By the way, garlic bulbs will deter spider mites).

I had marigolds planted about every 2-3 feet apart all around my garden last year, and the hornworms still feasted on my tomatoes! :no:

Yesterday, I was googling stuff to help deter the "bad bugs" and came across this:

[URL]http://www.sparkpeople.com/resource/nutrition_articles.asp?id=1324[/URL]

[URL]http://www.gardeningknowhow.com/problems/repelling-bad-bugs-with-plants.htm[/URL]


[URL]http://lifehacker.com/5583176/draft-keep-your-yard-and-garden-pest-free-without-harsh-chemicals[/URL]

Headed out now to see if I can find some dill, mint, yarrow and a few others to see if they will help any with the tomato monsters.... wish me luck!! :cute:

I can confirm the spider mites LOVE marigold. I used to plant them around the garden. But no more. I have enough of a fight as it is w/o giving them more of their favorite foods.

[QUOTE=Mollie's Nana;273848]

Headed out now to see if I can find some dill, mint, yarrow and a few others to see if they will help any with the tomato monsters.... wish me luck!! :cute:[/QUOTE]


Mints can be extremely invasive. I would keep them in pots around the garden rather than in it.

[QUOTE=DogsandDirt;274239]Mints can be extremely invasive. I would keep them in pots around the garden rather than in it.[/QUOTE]

+1 keep it in a pot

I plant tagetes, basil and nasturtiums around my tomato plants. I have seen 1 of those tomato hornworms in a pepper plant once last year. So I guess is either I am lucky or the rotations/companion planting are working or both. I have not seen spider mites near my tomato yet. Slugs are somewhat present but does not seem to bother my tomatoes so far.

I try to do companion planting and rotation but I am very much interested in Allelopathy to help me since I use organic growing methods.

I read today in my Mother Earth News magazine that horseradish deters Colorado Potato Beattle...I have been lucky that CPB have not found my potato plants yet.

I found that the beds that had brassicas before potatoes in my rotation had no wireworm damage and later I found some publications that the brassicas releases some compounds into the soil that wireworms don't like.

[QUOTE=wmontanez;295252]

I found that the beds that had brassicas before potatoes in my rotation had no wireworm damage and later I found some publications that the brassicas releases some compounds into the soil that wireworms don't like.[/QUOTE]

First I've heard of this- think I'll try to plant next year's potatoes where the fall brassicas are going. Thanks for sharing this observation.

kath

The areas where I had wireworm damage is when I converted lawn area to grow potatoes...

these 2 articles talk about it
[url]http://extension.oregonstate.edu/catalog/pdf/pnw/pnw607.pdf[/url]
[url]http://orgprints.org/10863/1/Wireworm_control_and_brassica_green_manures.pdf[/url]

so are spider mites bad
 

While reading this thread with much zest, as I have French marigolds all over the garden, who knows what is good and what is bad and what do spider mites do anyway?

Do Spider mites become spiders? and aren't spiders good for eatting other bugs?

Much confussin on :dizzy:this issue, no?

yes bt is definitely organic. i never heard of marigolds to deter thw but i have read they deter nematodes.

bt is so easy and effective why mess around with other things that may not work unless you want to have marigolds. i sprayed and the thw are all gone. i often don't have any thw in some seasons but if i do they seem to come appear one time and not again so i think i'm done with them... but i'll still watch.

tom

[QUOTE=JamesL;273308]My very limited knowledge of companion plants -
Borage and Basil to deter hormworms, Petunias to attract them.
The point of attracting them is of course is so you can lure them away from the tomatoes and then "deal with them" as you see fit.:D[/QUOTE]

[QUOTE=JamesL;273308]My very limited knowledge of companion plants -
Borage and Basil to deter hormworms, Petunias to attract them.
The point of attracting them is of course is so you can lure them away from the tomatoes and then "deal with them" as you see fit.:D[/QUOTE]

Although I have heard a lot about borage stoping the tomato worm, I find it untrue. I had two years ago planted over 150 tomatoe plants and got the worm. It dececrated my garden, not matter what I did to get rid of them they just kept multiplying. So I heard of the borage thing and planted it all over the tomato patch last year and still got thusands of worms.