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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July 23, 2015

Fruit IPM Report 7-22-2015

Peach

Oriental Fruit Moth (OFM): While overall pest pressure in peaches is very low for oriental fruit moth, we are at the proper time to treat if your farm has trap captures above 6 males per trap. Timing for third brood OFM applications are as follows:

OFM 3nd Generation Timing
Insecticide Type
County/Region Degree Days by 7/22
base 45		 Conventional Intrepid/IGRs Diamides
Gloucester-Southern 2317 1st – 7/17-19,
2nd – 7/27-28		 1st – 7/14-15,
2nd – 7/25-27		 1st – 7/13-18,
2nd – 7/24-27
Hunterdon-Northern 2053 1st – 7/24-28,
2nd – about 8/5-7		 1st – 7/22-24,
2nd – about 8/3-5		 1st – 7/22-23,
2nd – about 8/3-5

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Filed Under: Blueberry, Fruit, Tree Fruit, Wine Grape
July 1, 2015

Fruit IPM Report 6-30-2015

Peach

Oriental Fruit Moth (OFM): We are between 2nd and 3rd generation broods in southern counties, but still treating emerging larvae in northern counties. 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:
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Filed Under: Blueberry, Fruit, Tree Fruit, Wine Grape
June 29, 2015

Wine Grape Alert: Assess Protection Against Grape Berry Moth

Grape berry moth is one of the key direct pests of grapes in NJ. Females lay their eggs on the berry and the larvae makes a small entry hole and then feeds inside the berry. Webbing may be observed as the larvae move between berries.

A threshold of 10% webbing has been used in NY grapes.The MSU model predicted degree-day timing for Intrepid or Altacor applications against grape berry moth to be last Thursday in South Jersey (Bridgeton).

Due to the storm and the rains last week, applications may have reduced efficacy or were not able to be applied. If you have a history of grape berry moth pressure, today would be the tail end of timing for conventional materials. These include pyrethroids, like Bifenture or Danitol, or Imidan. Please read the label carefully as Imidan has a long re-entry interval. Also as a reminder, phytoxocitiy has been observed with using “EC” formulations of insecticides, such as Danitol, with Captan.

Filed Under: Fruit, Wine Grape
June 26, 2015

Fruit IPM Report 6-24-2015

Peach

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:
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Filed Under: Blueberry, Fruit, Tree Fruit, Wine Grape
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.
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Filed Under: Wine Grape