- Phytophthora blight is being reported in summer squash
- Angular leaf spot in cucurbits is wide spread in some areas
- Pythium and Rhizoctonia root rot have been reported in tomato and eggplant transplants
- Cucurbit downy mildew has been reported on cucumber as far north as Southern Georgia. To track cucurbit downy mildew in the US please visit http://cdm.ipmpipe.org/
- No late blight has been reported in the region to date and has only been found as far north as central Florida to-date. To track late blight in the US please visit http://usablight.org/
Vegetable Crops Edition
Seasonal updates and alerts on insects, diseases, and weeds impacting vegetable crops. New Jersey Commercial Vegetable Production Recommendations updates between annual publication issues are included.
Subscriptions are available via EMAIL and RSS.
Quick Links:
NJ Commercial Vegetable Production Recommendations
Rutgers Weather Forecasting - Meteorological Information important to commercial agriculture.
May 31, 2014 Andy Wyenandt
Vegetable Briefs 6-1-14
May 31, 2014 Andy Wyenandt
Vegetable Disease Update – 6/1/14
Pepper
Bacterial Leaf Spot – Symptoms of bacterial leaf spot on pepper leaves include small, brown water-soaked lesions that turn brown and necrotic in the centers. Spots may coalesce and form large blighted areas on leaves and premature defoliation can occur. On fruit, brown lesions can form which have a roughened, cracked wart-like appearance. High temperatures, high relative humidity and rainfall favor Bacterial spot development. Loss from Bacterial spot can be reduced somewhat by maintaining high levels of fertility, which will stimulate new growth. Applying a fixed copper (M1) at labeled rates may help suppress spread. Quintec (quinoxyfen, 13) at 6.0 fl. oz/A is now labeled for the suppression of bacterial leaf spot in pepper in the mid-Atlantic region. Please see the 2014 New Jersey Commercial Vegetable Production Recommendations Guide for more information.
Tomato
Bacterial spot and speck – Tomato transplants with suspected symptoms can be treated with streptomycin (Agri-Mycin 17, Agri-Strep, 25) at 1 lb/100 gallons, or 1.25 teaspoon per gallon every 4 to 5 days prior to transplanting. Additionally, Kocide 3000 (copper hydroxide, FRAC code M1) has a greenhouse label for speck and spot control in the greenhouse. Apply ½ to 1.5 TBSP per 1000 sq ft. every 5 to 10 days. Remember, phytotoxicity is an important issue when apply copper in enclosed structures, see label for cautions, restrictions and liabilities. After transplanting, apply Actigard at 0.33 oz 50WG/A (see label for use), or fixed copper (M1) at 1 lb a.i./A plus a mancozeb (Dithane, Manzate, Penncozeb, M3) at 1.5 lb 75DF or OLF, or ManKocide (M1 + M3) at 2.5 to 5.0 lb 61WP/A on a 7 day schedule.
May 27, 2014 Kris Holmstrom and Joe Ingerson-Mahar
Veg IPM Update: Week Ending 5/28/14
Click Image to View
Vegetable IPM Report 5-28-14 – Click to View | Download | Print
Maps for the Week
-European Corn Borer Population Map
-Pepper Weevil Trap Catch MapTopics for the Week
- Sweet Corn
- Cole Crops
- Peppers
- Tomatoes
- Pepper Weevil Report
- BMSB
May 25, 2014 Andy Wyenandt
Vegetable Disease Briefs 5-25-14
- Hail damage has been reported in areas of southern New Jersey.
- Cucurbit downy mildew has been reported on cucumber as far north as Southern Georgia. To track cucurbit downy mildew in the US please visit http://cdm.ipmpipe.org/
- No late blight has been reported in the region to date and has only been found as far north as central Florida to-date. To track late blight in the US please visit http://usablight.org/
May 25, 2014 Andy Wyenandt
Vegetable Disease Update 5-25-14
- Potato
- Strawberry
- Tomato
Potato
Blackleg is caused by Erwinia spp. which also cause ‘soft rots’. The bacteria which lead to the aerial phase of Blackleg are soil-borne (originate from old crop debris) and spread by rainfall, overhead irrigation and wind. [Read more…]
May 25, 2014 Andy Wyenandt
Recognizing Angular Leaf Spot in Cucurbits
Angular leaf spot is common in New Jersey and the region. It often shows up during cool, wet weather and isolated rain.
Symptoms of angular leaf spot in cucurbit.
Angular leaf spot of pumpkin. Note leaf ‘shot holes’.
Angular leaf spot will first appear as, small water-soaked lesions which will expand until they reach a larger leaf vein resulting in the angular looking symptoms on leaves. Under heavy disease pressure, the bacteria will infect fruit causing small, water-soaked circular spots. In many cases once weather conditions become dry again, infected tissue in leaves will die and fall out leaving the characteristic ‘shot hole’ symptoms. Control of angular leaf spot begins with the application of labeled rates of fixed copper plus mancozeb to help suppress the spread of the disease until hot, dry weather returns.
