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Organic Research NeedsOrganic Research Needs:
Some Important Vegetable Pests and Possible Organic Controls that
Lack Efficacy Data
| Crop |
Pest |
Occurrence
1=sporadic,
3=yearly |
Cultural
controls
effective? |
Possible rescue control |
| Brassica |
Flea beetle
|
3
|
Y
|
Rotenone, kaolin, pyrethrum,
soap
|
|
Cabbage aphid |
2 |
? |
Soap, oil, neem, Beauveria |
|
Cabbage maggot |
2 |
Y |
Neem |
|
Onion thrips |
1 |
? |
Kaolin, pyrethrum, spinosad |
|
Alternaria |
2 |
Y |
Microbial products* |
|
Black leg |
1 |
Y
|
Microbial
products* |
|
Clubroot
|
1
|
Y
|
Microbial products* Microbial
products* |
| |
Downy mildew |
1 |
Y |
|
| Cucurbit |
Head rot |
2 |
? |
|
| |
Striped cucumber beetle/
Bacterial wilt |
3 |
Y |
Microbial products* Pyrethrum,
kaolin, rotenone, Beauveria |
|
Squash bug |
2 |
N |
Beauveria, kaolin, pyrethrum,
spinosad, plant oils |
|
Black rot |
2
|
N
|
Microbial products* |
|
Phytophthora |
1 |
N |
Microbial products* |
|
Powdery mildew |
3 |
N |
Several good controls , comparative
trials needed |
| Lettuce |
Tarnished plant bug |
2
|
?
|
Beauveria, kaolin, neem,
pyrethrum, spinosad |
|
Aster leafhopper/ Aster yellows |
2 |
Y |
Neem, kaolin, repellents, pyrethrum |
|
Sclerotinia |
1 |
Y |
Contans® |
|
Powdery mildew |
2
|
Y
|
Bicarbonate, B. subtilis,
microbial, oils, soap |
| |
Downy mildew |
2 |
Y |
Bicarbonate, B. subtilis, microbial,
oils, soap |
| Onion |
Onion thrips |
2 |
Y |
Beauveria, kaolin, pyrethrum,
spinosad |
|
Botrytis |
2
|
Y
|
Oils, microbial products* |
| |
Purple blotch |
1 |
Y |
Oils, microbial products* |
| Pepper |
Downy mildew |
1
|
Y
|
Oils, microbial products* |
|
Aphids/CMV |
1 |
Y |
Neem, repellents |
|
Tarnished plant bug |
1 |
? |
Beauveria, kaolin, neem,
pyrethrum, spinosad |
|
European corn borer |
2 |
? |
Control available, improve timing/application |
| Potato |
Potato leafhopper |
2 |
N |
Neem, kaolin, repellents, pyrethrum, rotenone,
soaps, oils |
|
Colorado potato beetle |
2 |
Y |
Alternate controls needed to avoid resistance to spinosad |
|
Rhizoctonia |
2 |
Y |
Microbial products* |
|
Scab |
3 |
Y |
Microbial products* |
|
Late blight |
1 |
N |
Microbial products*, hydrogen peroxide |
| Sweet corn |
Seed corn maggot |
1 |
Y |
Microbial products* |
|
Damping off |
2 |
Y |
Microbial products* |
|
European corn borer |
3 |
N |
Bt, spinosad, Trichogramma |
| Tomato |
Early blight |
3 |
Y |
Oils, copper, microbial products |
|
Late blight |
1 |
N |
Microbial products*, hydrogen peroxide |
|
Anthracnose |
2 |
? |
Microbial products* |
|
Stink bug |
1 |
? |
Neem, pyrethrum |
* Microbial products including plant growth-promoting rhizobacteria,
Gliocladium catenulatum, Trichoderma harzianum, Ampelmyces quisqualis,
Myrothecia, Pseudomonas flourescens, Streptomyces griseoviridis,
and others. Note: Another area needing research is efficacy
of combinations of pesticides. Combinations or alternating use
of some of these products need to be explored further.
|
