Fruit Crops Edition - Wine Grape Section

Seasonal updates on diseases, insects, weeds impacting small fruit (blueberry, cranberry, and wine grape). Fruit Pest Alerts are also available via this category feed.
 
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June 17, 2015

Fruit IPM Report 6-16-2015

Peach

Brown Marmorated Stink Bug (BMSB): Adults are occasionally seen during orchard scouting. Knock down materials will be required for the remainder of the season in orchards with BMSB populations.

Oriental Fruit Moth (OFM): Second generation flights are very low in most areas. By all indications this generation should produce much lower pressure than the 1st generation. Any insecticides which are applied now should target this generation. Growers who have trap counts that are less than 6 moths per trap can skip insecticides that are intended for OFM. If trap counts are higher, then time your sprays according to the following table:
[Read more…]

Filed Under: Blueberry, Fruit, Tree Fruit, Wine Grape
June 12, 2015

Vineyard Nutrition Monitoring

from NJ Center for Wine Research & Education

Bloom is here and it is a great time to get an accurate assessment of the nutritional status of your grapevines.

Monitoring Grapevine Nutritional Status

Grape Leaf PetioleWhat to sample? Soil or leaf petioles.
Soil sampling should be performed before planting and every 3 years, primarily to track the pH. Sample each block as you would for other crops.

The more direct method for determining the nutrient status of the vine is tissue sampling, specifically petiole sampling (Figure 1. Grape leaf blade and detached petiole). Petiole sampling should be performed every 2-3 years in established plantings. You may need to sample annually when establishing the vineyard.
[Read more…]

Filed Under: Wine Grape
June 2, 2015

Fruit IPM Report 6-2-2015

Peach

Bacterial Spot: Leaf symptoms have been seen in only a few locations and only on highly susceptible varieties. Bacterial spot has not been troublesome this spring probably due to mostly dry conditions during petal fall and early covers. Fruit remains highly susceptible until pit hardening so management practices should be continued.

San Jose Scale Crawler

San Jose Scale Crawler (yellow)

San Jose Scale (SJS): Scale crawlers have not yet been seen but are usually active by now. The best materials include Esteem, Centaur, and Movento. Esteem and Centaur can both be applied at the start of crawler emergence. Movento may take up to a week become fully systemic. It should also be applied with a spreader. Spray volume is the name of the game when achieving good scale control. Diazinon can also be used with a maximum of 1 in-season application per year. The sprayer should be calibrated to soak all wood surfaces where there is known scale activity.

Green Peach Aphids (GPA): GPA colonies are present in northern peach orchards at up to 3 colonies per tree and over 1 colony per tree in nectarines. For peaches these levels can be tolerated, but not on nectarines where GPA damage is present on the fruit.

Plum Curculio (PC): PC activity is over in southern counties but still active in northern counties. Fresh eggs were recently deposited on peaches late last week. Activity should not last too much longer, so one additional cover of a PC effective insecticide should be all that is needed.

Tufted Apple Budmoth (TABM): Tufted apple budmoth started to emerge on 5/12 in southern counties and on 5/17 in Hunterdon County. While this insect has not been an issue over the last 6-8 years, locally high levels of moths have been captured in some pheromone traps this past week. TABM is a leafroller that can web a leaf to the surface of the fruit, and feed between the leaf and the fruit. On peaches this damage can lead to unmarketable and rotten fruit. Young larvae may get established in the stem end. When this is the case, the larva can ‘fall’ into the fruit interior in varieties where the flesh easily separates from the pit, or in split pit fruit. Degree day modeling for timing sprays dictates that the first alternate middle treatments should be timed for around 6/1-2 in southern counties, and by about 6/11-12 in Hunterdon County and northern farms. This is for conventional materials, including Delegate, Altacor, Belt and other diamide mixtures. Timings for TABM control are outlined below. If you are a grower who did have TABM damage last year, you are advised to use the timings that follow:

Conventional,
Diamides		 Conventional,
Diamides		 Intrepid,
Rimon		 Bt
County Area AM – 4 Alt Mid Sprays EM – 2 Complete Sprays EM – 2 Complete Sprays EM – 2 Complete Sprays
Southern 1st 6/1-2, 2nd 6/6-8 1st 6/3-6 1st 6/2-8 1st 6/6-8
Northern 1st 6/9-10 1st 6/11-14 1st 6/10-13 1st About 6/14-18

[Read more…]

Filed Under: Blueberry, Fruit, Tree Fruit, Wine Grape
May 5, 2015

Performing a Detailed Inspection of Wine Grape Planting Material

Figure 1. A bundle of healthy grafted grape vines. These vines are moist, have healthy roots, and are clearly labeled.

Figure 1. A bundle of healthy grafted grape vines. These vines are moist, have healthy roots, and are clearly labeled.

Spring is a good time to plant new grapevines as the soil is warm and moist enough to support early growth and vines get plenty of time to get established during the growing season that follows. When your order of vines arrives, make sure that your planting material is of good quality before it is planted.

Source Planting Materials from Quality Nurseries

The best way to begin ensuring that you have good, healthy and productive grapevines is to source planting material from nurseries that provide clean materials or certified vines. Planting material from nurseries that follow quality assurance protocols reduces the chances of getting diseased or weak planting material.
Certified material means cuttings come from a source block that was properly managed, subjected to regular inspections for insect pests, disease damage, and tested for virus right from propagation through packaging. These nurseries also go through independent third party audits.

Make sure that planting material comes with documents or labels that will help in tracing plants back to the original source. Each bundle of vines should have proper labels describing primary information such as variety, clone, rootstock and some kind of batch number. Make sure your planting material was shipped promptly after packing and came in a temperature-controlled vehicle. Presently there are no certified nurseries in New Jersey; however, there are several certified nurseries available in California and few in Oregon, Washington and New York. [Read more…]

Filed Under: Wine Grape
March 18, 2015

Wine Grape IPM School: March 31

Date: March 31, 2015
Location: RAREC, 121 Northville Road, Bridgeton, NJ 08302
 
Wine Grape IPM Flyer

Rutgers University and the NJ Center for Wine Research and Education will be hosting a “Grape IPM School” on March 31st in Bridgeton, NJ. Experts from Michigan, Virginia and Ohio will be joining Rutgers to share their knowledge about key insect pests, diseases and weed identification. This workshop is aimed at growers of all experience levels.

Please pre-register (856-455-3100 or bradbury@aesop.rutgers.edu)
Space is limited. See attached flyer for details.

Grape IPM School Flyer

Filed Under: Wine Grape
March 5, 2015

Grape IPM School March 31, 2015

With all the snow and cold weather it’s hard to believe that it’s March already and Spring is right around the corner! It’s time to start planning your pest management programs.

For the first time, we are hosting an all-day “Grape IPM School”. The aim of this “school” is to introduce and update wine grape growers of all experience levels to the key pest issues they face. We will discuss the basics of Integrated Pest Management (IPM) and how to apply it to your vineyard. We have invited regional experts who will share their expertise on how to use IPM to scout for and manage grape berry moth, grape root borer, plant viruses and diseases, among others.

Please join us at the Rutgers Agricultural Research and Extension Center (RAREC), 121 Northville Rd., Bridgeton on MARCH 31st.  Mark your calendars, more details to follow….

Filed Under: Wine Grape