| Extension/Outreach |
1 |
Pathogens |
|
6- to 12-Inch Shoot |
Enhance grower decision-making and minimize prophylactic insecticide applications and costs |
| Regulatory |
1 |
All |
|
6- to 12-Inch Shoot |
Group 1 pesticides, as identified by EPA, are a high priority for regulatory scrutiny. These are: aldicarb (Temik), carbaryl (Sevin), chlorpyrifos (Lorsban), endosulfan (Thiodan or Phaser), ethoprop (Mocap), methyl parathion (PennCap M), phosmet (Imidan) thiabendazole (Mertect 340-F), dacthal (DCPA). |
| Regulatory |
2 |
All |
|
6- to 12-Inch Shoot |
The need for SREIC to engage in the IR-4 process to enhance opportunities for testing and registering reduced-risk products in sweetpotatoes. |
| Regulatory |
2 |
Pathogens |
|
6- to 12-Inch Shoot |
Increase registration of herbicides for control of key weed species such as Carfentrazone, Sulfentrazine, Halosulfuron, Metolachlor and Dimethanamid. |
| Research |
1 |
|
|
6- to 12-Inch Shoot |
Major weed species in need of further investigation: nutsedge (purple, yellow, rice flats), pigweed, annual grasses, sicklepod, sesbania, and ground cherry nightshade. |
| Research |
1 |
All |
|
6- to 12-Inch Shoot |
Causal factors associated with insect damage, |
| Research |
2 |
|
|
6- to 12-Inch Shoot |
Other weed species also worth review include morningglory species, lambsquarters, cocklebur, perennial grasses (Johnson grass, Bermuda grass), s. sandspur, common ragweed, prickly sida. |
| Research |
2 |
All |
|
6- to 12-Inch Shoot |
Insect monitoring and scouting techniques, |
| Research |
3 |
|
|
6- to 12-Inch Shoot |
The development of reduced risk strategies for weed management. Basic biology of various weeds such as sedges and Palmer amaranth interactions may be critical in reducing root damage. |
| Research |
3 |
All |
|
6- to 12-Inch Shoot |
Interactions between weed populations and insect damage, |
| Research |
4 |
|
|
6- to 12-Inch Shoot |
Information about causal factors related to the density and diversity of weeds in fields. 1) the interaction between weeds, insects and diseases, 2) crop history, 3) planting date, and 4) soil and moisture conditions. |
| Research |
4 |
All |
|
6- to 12-Inch Shoot |
The etiology of post-harvest root damage, |
| Research |
5 |
All |
|
6- to 12-Inch Shoot |
Reduced-risk disease management tools, |
| Research |
6 |
All |
|
6- to 12-Inch Shoot |
Techniques for enhancing the health of propagation materials, |
| Research |
7 |
All |
|
6- to 12-Inch Shoot |
Growers’ priority weed problems, |
| Research |
8 |
All |
|
6- to 12-Inch Shoot |
Weed-free periods or density thresholds to minimize herbicide use, and |
| Research |
9 |
All |
|
6- to 12-Inch Shoot |
New sweetpotato varieties resistant to diseases, insects and weed competition |
| Research |
10 |
All |
|
6- to 12-Inch Shoot |
Research focused on basic pest biology, particularly for pathogens and soil-borne insects. A better understanding of pest life cycles and relationships to potential causal agents such as soil and climate conditions, cropping history, and cultivar selection is necessary to develop basic IPM tools. |
| Research |
10 |
Pathogens |
|
6- to 12-Inch Shoot |
At least eight insect pests cause significant yield and quality effects in sweetpotato production. 1) wireworms, 2) white grubs, 3) sweetpotato weevil, 4) sweetpotato flea beetle, 5) cucumber beetle, 6) white fringed beetle, 7) armyworm/cut worm complex, and 8) sugarcane beetle. |
| Research |
11 |
Pathogens |
|
6- to 12-Inch Shoot |
There is a lack of effective scouting and monitoring techniques, particularly for soil-borne insects, including wire worms, white grubs and spotted cucumber beetle |
| Research |
12 |
Pathogens |
|
6- to 12-Inch Shoot |
Registered pesticides or other control strategies, are not available to manage pests that emerge later in the growing season |
| Research |
13 |
Pathogens |
|
6- to 12-Inch Shoot |
Basic pest biology, population dynamics and field conditions necessary to correlate insect damage with causal factors |
| Research |
14 |
Pathogens |
|
6- to 12-Inch Shoot |
Viable cultivars with measurable resistance to insect pests |
| Research |
15 |
Insects |
|
6- to 12-Inch Shoot |
New, reduced-risk disease management methods is a limited understanding of which pathogens are causing significant loss of yield and quality. 1) the effect of specific pathogens on production, 2) the extent of root damage caused by particular pathogens, and 3) the relationship between specific pathogens and rejected product shipments. Additional knowledge gaps include an inadequate understanding of: 1) how selected pathogens are spread, 2) population dynamics of pathogens and vectors, 3) economic thresholds, particularly for nematodes, 4) buyer practices, including which diseases are present and how much must be present for a shipment to be rejected, and 5) the efficacy of existing materials. |
| Research |
16 |
Insects |
|
6- to 12-Inch Shoot |
The lack of information on the yield and quality effects of specific pathogens is particularly acute with viruses and postharvest diseases. |
| Research |
17 |
Insects |
|
6- to 12-Inch Shoot |
Alternatives are needed to control post-harvest diseases at this stage. |
| Research |
18 |
Insects |
|
6- to 12-Inch Shoot |
Disease transmission is a needed area of research. A better understanding of aphid and whitefly population dynamics would help identify whether it is feasible to reduce reinfection by viruses by controlling aphid and whitefly vectors. Little is known about the spread of the bacterium, E. chrysanthemi (e.g., via fruit flies in storage or by cutting plants). |
| Research |
19 |
Insects |
|
6- to 12-Inch Shoot |
Economic thresholds are not developed for most disease problems such as Rhizopus soft rot, |