Posts Tagged ‘20:1’

Cover Crops that Did Not Winter Kill

Friday, March 2nd, 2012

Gordon Johnson, Extension Vegetable & Fruit Specialist; gcjohn@udel.edu

With the mild winter, many cover crops have not fully winter killed including fall planted spring oats, forage radish, and some mustard species. For vegetable growers seeking to have early areas for spring planting, this will require that these cover crops be killed by herbicides, low mowing, or tillage. This will also limit the potential to no-till vegetables into these areas.

Pea Planting

Friday, March 2nd, 2012

Gordon Johnson, Extension Vegetable & Fruit Specialist; gcjohn@udel.edu

Pea planting has started across the region. A common problem with early pea plantings is compaction and resulting yield losses, particularly where field operations were performed when soils were too wet. Much of the loss is due to reduced germination or seedling death. In addition, early maturing (low heat unit) peas have a lower yield potential and cannot compensate for stand losses as well as later maturing varieties. Compacted soils also set up conditions favorable to the development of root rots which further limit yields. Research has shown that root rot severity can be increased by over 50% in peas where there is heavy compaction.

Another interesting note on peas is the potential to increase overall yields by planting longer maturing varieties, even for the early plantings. Long season varieties have greater genetic potential for producing high yields. While processors will want to plant early varieties to start the season to supply factories starting at the end of May, including later maturing varieties in early plantings will produce higher yields for the next round of harvests in early June and then onward.

Processing Acres Up This Year

Friday, March 2nd, 2012

Gordon Johnson, Extension Vegetable & Fruit Specialist; gcjohn@udel.edu

Processing vegetable acres will be up this year in Delaware and on Delmarva including peas, lima beans, and sweet corn. Pickle acreage will remain steady. This increase in acres is largely due to reduction in stocks. For example, for lima beans, cold storage stocks in January 2011 were 58 million pounds and in January 2012 these stocks were down to 44 million pounds. Peas were down from 234 to 210 million pounds and sweet corn was down from 521 to 436 million pounds. This drop in sweet corn stocks is a major driver in picking up acres. It is interesting to note that in 2011, Delmarva lima bean acres were close to 19,000. This represented over 60% of the US acres and 40% of the production. California acres are down due to competition for land with more profitable crops.

Sweet Corn Fungicide Label Updates

Friday, March 2nd, 2012

Bob Mulrooney, Extension Plant Pathologist; bobmul@udel.edu

A few new fungicide combinations are now labeled for sweet corn as well as field corn. Stratego YLD is a new combination of trifloxystrobin plus Proline (prothioconazole). Headline AMP is a combination of pyraclostrobin and Caramba (metconazole) and Quilt Xcel is a higher concentration of Quadris (azoxystrobin) plus Tilt (propiconazole). They will provide excellent control of Northern corn leaf blight, gray leaf spot, and rust if used as directed on the label.

Insecticide Label Updates for Vegetable Crops

Friday, March 2nd, 2012

Joanne Whalen, Extension IPM Specialist; jwhalen@udel.edu

Potatoes
Please note that there is no longer a Special Local Needs 24C Label for the use of Diazinon AG500 for wireworm management in potatoes in Delaware. This label has been cancelled by the manufacturer so it is no longer legal to use diazinon on potatoes in Delaware.

Besiege and Voliam Xpress Labels
Syngenta Crop Protection recently announced that succulent beans (peas and beans) and sweet corn have been removed from the federal Voliam Xpress label and have been added to the federal Besiege label (you will see this change in the labels currently posted on cdms). We also have the state label for Besiege in Delaware which includes sweet corn and succulent beans (as a reminder — you need both a state and federal label to apply any product). It is my understanding that all states will eventually have a Besiege state label that includes sweet corn and succulent beans; however, you will need to contact your state Department of Agriculture to determine when this will occur in other states. At this point, Syngenta has indicated that sweet corn and succulent beans will eventually be pulled in all states from the Voliam Xpress label. However, they will not be producing any new Voliam Xpress until September 2012 with the new label. So existing stocks of Voliam Xpress that have sweet corn and succulent beans on the label should be OK to use until new product is in the market place – be sure to check with your Department of Agriculture for confirmation as well as read the label on the container – the label is the law. At this point, all other vegetable crops (except sweet corn and succulent beans) will remain on the Voliam Xpress label.

Besiege Federal Label Currently on cdms — http://www.cdms.net/LDat/ldA7G007.pdf

Voliam Xpress Label Currently on cdms – http://www.cdms.net/LDat/ld8N5003.pdf

Vegetables Added to the Belt Insecticide Label
Bayer CropScience recently announced that a number of vegetables have been added to the Belt insecticide label. The insecticide product Synapse, which also contains the same active ingredient as Belt, flubendiamide, will be phased out. Once the Synapse inventory is depleted, Bayer will carry only Belt as their flubendiamide product. Please see the Belt label for crops labeled, use rates and restrictions. (http://www.cdms.net/LDat/ld8LJ012.pdf)

Seed Corn Maggots Control in Spring Planted Vegetables

Friday, March 2nd, 2012

Joanne Whalen, Extension IPM Specialist; jwhalen@udel.edu

With the warm winter conditions, we have observed seed corn maggot flies actively laying eggs earlier and for a longer period of time. Adult flies are active in temperatures down to the mid 40s so it very likely that maggot populations could be higher in spring planted vegetables. Conditions that favor egg laying activity include decaying cover crops, high organic matter, freshly plowed fields, and/or manure applications. Spring planted vegetables susceptible to maggot damage include cole crops, melons, peas, snap beans, spinach, and sweet corn. Control options can include commercial applied seed treatments, or soil insecticides; however, not all options are available for all crops. As a reminder, seed treatment labels indicate that they provide only early season protection of seedlings against injury from seed corn maggots. Please refer to the labels as well as the DE Commercial Vegetable Production Recommendationshttp://ag.udel.edu/extension/vegprogram/publications.htm#vegrecs

WCU Subscription Options for 2012: Mail, Fax, Email or Text

Friday, March 2nd, 2012

We hope that this first issue of Weekly Crop Update for 2012 will help you get your growing season off to a good start. The next WCU for 2012 will be issued on March 30. The WCU will then be posted on the web, and sent to mail and fax subscribers by 4:30 p.m. each Friday until September 21. The cost of mail or fax subscription is $40. You can subscribe by returning the 2012 WCU Subscription Form. The WCU is also available for free online as a printable PDF or in a blog format through this site.

For those of you who access the newsletter via the internet we offer to send a weekly email reminder which will let you know when the WCU has been posted online, provide a link directly to the current issue, and give you a taste of the headlines. If you would like to receive the email reminder or if you experience problems during the season with the online WCU please contact me at emmalea@udel.edu or (302)-856-7303.

I will also send out a text message each week when a new issue is posted. The message will be brief, and the text message distribution list will not be used for other announcements except those of an urgent nature (i.e. pest or disease alerts). If you would like to receive the text reminder please send your name, number and cell phone carrier to me at the above email address or send a message to 302-233-4719.

Emmalea Ernest