Brassica Fungus?

[FSU_Seminole]

I was just speaking with a friend who warned me about planting brassica plots 2 years in a row in the same place because of some sort of fungus.

I know where I hunt the farmers usually don't plant soybeans the same place for that very same reason but is it also true with brassica? I haven't heard of any deer hunters or plot managers mention this.

[dogdoc]

Re: Brassica Fungus?

yep--it true. We had a discussion on this a few years ago on the QDMA forum. It was suggested by one of the QDM experts that you need to rotate a different winter crop every 3 years. So you can plant 2 years in a row then the third year plant something different--such as a cereal grain/winter pea mix.

todd

[FSU_Seminole]

Re: Brassica Fungus?

Thanks for confirming this Doc, it will save me alot of trouble.

[Thayer]

Re: Brassica Fungus?

Hey Todd, do you have any links about the fungus stuff...I know I have searched and came up empty...The Purina folks did not know of any problems like the fungus...I would like to show them some of articles on the rotation of those brassica's.

[LETMGROW]

Re: Brassica Fungus?

Several Food plot seed suppliers have said. Don't plant over two years in the same plot area. EH Outdoors [ Evolved Habitat] Warns against planting more than two years, Brassicas in the same plot. Fungas and bugs seem to reproduce in the soils. Crop rotation seems to be the accepted procedure.I would suggest you talk to your local Extension agent about this.

[dogdoc]

Re: Brassica Fungus?

DISEASES

As for insects, diseases in a field can be detrimental to a market and a food reserve. Scouting is again necessary to determine the areas where disease are prevalent and the control needed as well as, to decrease the number of outbreaks. There are numerous diseases which affect turnips.

Black Rot- caused by Xanthomonas compestris pv. campestris. This disease affects the above ground portion of the crop but may also affect the roots. Roots which are affected are known to develop dry rot, leading to upmost devistation of a crop. Signs of this disease include dwarfing of young seedlings, and lower leaf drop, a V shaped pattern will form on the leaves and as the disease progresses to the to the midrib of the leaf it causes the veins to turn black, thus the infected portion becomes brown and dry. The best means of control is using bacteria free seed. Using seed treated by hot water treatments and spraying the crop with a fungicide at 7-10 day intervals will decrease the possible spread of the disease.

Root Knot Nematodes- Meloidogyne spp. Root knot nematodes invade the root portion of the crop causing infected roots to swell at the invasion point and develop knot gall. Above ground symptoms such as decreasing growth, and wilting yellow leaves. Overall the plant dies prematurely. Chemical treatments with a nematicide fumigant is the best possible means of control.

Clubroot- Plasmodiophora brassicae is one of the most serious soilborne diseases of the Brassica family, especially detrimental in soils which are acidic. As soil temperatures rise the disease becomes more aggressive. Disease offspring known as zoospores enter into the plant by its roots, through either parasitic wounds or mechanical wounds. A club like or knot like structure is formed at the roots where extreme cell malformation has occurred. Symptoms appear as continual wilting and then recovery, eventually the plant does not recover and thus dies. Rotation with nonsucceptible crops, sanitation, and disinfecting equipment, and a pH above 7.3 discourage the disease.

Fusarium Wilt-Fusarium oxysporum F.sp spinaclae is a seedborne and soilborne fungus that is common if soil temperature is warm. The main symptom of the disease is a vascular discoloration in crown area. Other symptoms include pale green and leafy margins, a rolling of leaves inward as the plant then wilts and dies. Treated seed and field rotation are the best methods of control for this disease.

Downy Mildew- Peronospora parasitica Penetrates the vegetative growth between leaf cells as the disease spreads. Disproportionate, purple spots begin developing on leaves, and stems, these enlarging spots becoming yellow brown. A mildew forms and grows under the leaf surface. Overwintering structures can be found on plants or in infected plant debris. Humid coastal regions are a haven for this disease which can cause damage to young plants and transit crops. Extremely moist and temperatures between 50-60 degrees°F can encourage this disease. Crop rotation, and fall plow will decrease incidence.

Black leg- Phoma lingam. Survival is within seed and infected plant debris. Infected seed germinate causing a fungus to grow quickly infecting the seedlings causing lesions, and stunting of overall growth. Rainfall and irrigation can spread the disease from a diseased plant to a healthy plant.

Turnip Yellow Mosaic virus is transmitted by over 50 different species of aphids. Symptoms of this virus include black necrotic spots, leaf distortion, stunting, mosaics, and mottling.

http://www.uga.edu/vegetable/turnip.html

[Thayer]

Re: Brassica Fungus?

Thank you sir!

[dogdoc]

Re: Brassica Fungus?

[ QUOTE ]

Thank you sir!

[/ QUOTE ]

you're welcome, SIR

[LETMGROW]

Re: Brassica Fungus?

I am not going to quote DogDocs reply, in the interest of saving space. If you aren't convinced now, not to over plant brassicas, SHAME on you. Purina should take heed.