Landscape, Ornamentals, Nursery, and Turf Edition

Seasonal updates on ornamental, nursery, and turf pests.
Subscriptions are available via EMAIL and RSS.

 

Companion Website Links:

Rutgers Turf Blog - Articles on turfgrass diseases and cultural practices for the commercial turfgrass industry. Subscription available via RSS.

 

Rutgers Weather Forecasting - Meteorological Information important to commercial agriculture.

Unsolicited Seeds From Foreign Sources

Several states are now reporting and you may have read or heard news reports of packets of seeds arriving in the mail from foreign shipping addresses that were not ordered. If you receive such a packet, DO NOT open or discard them. Rather, follow these directions from the NJ Dept of Agriculture:

UPDATED NJDA ALERT (https://www.nj.gov/agriculture/news/hottopics/topics200727.html)

We have been receiving reports of people receiving seeds in the mail from China that they did not order. Sometimes the seeds are sent in packages stating that the contents are jewelry. Unsolicited seeds could be invasive, introduce diseases to local plants, or be harmful to livestock.

Here’s what to do if you receive unsolicited seeds from another country:

This is known as agricultural smuggling. Report it to the USDA!

  1. DO NOT plant them and if they are in sealed packaging don’t open the sealed package.
  2. Take a photo of the package and seeds and send the photos to the New Jersey Department of Agriculture Joseph.zoltowski@ag.nj.gov and USDA SITC at  SITC.Mail@aphis.usda.gov
  3. Maintain the seeds and packaging and send to the USDA Office located at 1500 Lower Rd, Linden NJ 07036 for evidence. 

If individuals are aware of the potential smuggling of prohibited exotic fruits, vegetables, or meat products into or through the USA, they can help APHIS by contacting the confidential Anti-smuggling Hotline number at 800-877-3835 or by sending an Email to SITC.Mail@aphis.usda.gov. USDA will make every attempt to protect the confidentiality of any information sources during an investigation within the extent of the law.

One-line email signature graphic: We R Here When You Need Us.

****************************************************************

cid:image002.png@01D3F9A9.A68FD670

Differentiating the Common Wood Borers of Ash Trees

Today, it is understandable for arborists and landscapers to assume that Emerald Ash Borers (Agrilus planipennis) are the cause when they observe branch die-back of ash trees (Fraxinus genus). During the 21st century, this invasive Asian tree beetle borer has killed many 100’s of millions of ash tree species as it has spread across much of the eastern half of the United States. However, it is important to remember some of the other wood borer species that cause ash decline, if not death. This blog will discuss the symptoms to distinguish between the Emerald ash beetle borer, the Ash/Lilac Clearwing moth borer (Podosesia syringae), the Banded Ash Clearwing moth borer (Podosesia aureocincta) and Ash Bark Beetle borers (Hylesinus species). Only the ash bark beetle species will have more than a single generation per season.

Symptoms on ash from banded ash clearwing moth borer infestation. (Photo Credit: Steven K. Rettke of RCE)

[Read more…]

NYCAMH/NEC Farmworker Needs Assessment Survey

The New York Center for Agricultural Medicine & Health/Northeast Center for Occupational Health and Safety in Agriculture, Forestry, and Fishing based in Cooperstown, NY is conducting a farm worker health needs assessment to help them better address worker health and safety needs during the COVID-19 pandemic. [Read more…]

Don’t Let Your Guard Down With Farm Worker Health

The COVID-19 pandemic has highlighted the critical, indeed essential, role of farm labor in getting food from farm to plate. However, health concerns should not stop with a negative COVID test, especially if an employee or family member is exhibiting any of the ‘flu-like’ symptoms that are associated with corona virus.

A recent farm call was a reminder that working outside, especially during this July heat wave, exposes workers to a number of potential health risks that may present very similar symptoms and can be equally health, and even life, threatening. Recently published studies from the Rutgers Institute of Earth, Ocean, and Atmospheric Sciences suggest growing numbers of people worldwide are at risk of heat stress and related complications, including farmers and ag laborers working in high heat and humid conditions.

Harvesting and other activities along field edges, including going into the woods instead of using a portable bathroom facilities, also lead to a high risk of tick bites, which can also carry a number of diseases, many as or more debilitating than Lyme disease that most are now aware of. A recent story at Today.com suggested that the COVID-19 pandemic might lead to more tick-borne disease this year, quoting Rutgers entomologist and assistant professor Alvaro Toledo at the Center for Vector Biology with suggestions how to prevent tick bites.

It is critical for your employees’ health and well-being to get proper diagnosis and treatment for all of these ailments. This table illustrates how many tick-born diseases, as well as heat stress, all have potential symptoms very similar to those of COVID-19. Each is linked to additional resources at the CDC. In many cases, it may be the ‘other symptoms’ that may be unique to each disease and assist a medical practitioner with correct identification and lead to better verification with further testing.

   Disease    >

Symptoms  v

COVID-19 Heat Stress Lyme Disease Ehrlichiosis Babe- biosis Powas-san Rocky Mtn Spotted Fever
Vector* Human Black-legged Tick (a.k.a. Deer Tick) (I. scapularis) Lone Star Tick (A. americanum) & Black-legged Black-legged Tick Ground hog(I. cookei), Squirrel (I. marxi) & Black-legged Ticks American Dog Tick (D. variabilis)
Fever or chills X X X X X X X
Cough X X
Shortness of breath/difficulty breathing X
Fatigue X X X X
Muscle/body aches X X X X X X
Headache X X X X X X X
New loss of taste or smell X
Sore throat X
Congestion or runny nose X
Nausea/vomiting X X X X X X X
Diarrhea X X
Rash X X X
Other symptoms X X X X X X
Potentially Deadly/Disabling
X X X X X X X

*NOTE – main vector listed, but many tick born diseases may be vectored by other species of ticks, or different species causing same disease may be carried by different tick species.

Managing Heat Stress in Nursery and Landscape Plants

With temperatures approaching or exceeding 95oF for many areas of the state, there is potential for heat stress to negatively impact nursery and landscape plants both in the ground and in containers. Most trees and shrubs in our area can begin to experience some degree of heat stress when temperatures exceed 85oF. Several factors can influence the extent of heat stress injury, including the severity and duration of high temperatures, relative humidity, wind, soil moisture status, the age and condition of the plant, and how well the particular species of plant is adapted to dealing with these conditions.

Japanese Maple

Leaf Scorch on Japanese Maple caused by heat stress. Photo Credit.

Heat stress can cause damage to the leaves, resulting in dried or curled edges, as well as reddish or pale coloration as the green chlorophyll pigment begins to break down. This damage may only be superficial, but in some cases it could cause serious injury and death of the leaf tissue. One factor that greatly affects the severity of tissue damage caused by heat stress is the hydration status of the plant before the onset of extreme temperatures.

Plants will naturally dissipate heat through the process of transpiration, provided there is adequate moisture in the soil to support this function. During periods of extreme temperatures, the roots will struggle to draw enough water from the soil to keep up with the rate of water vapor that is exiting the leaves through transpiration. This leads to symptoms such as leaf scorch, curled leaves, discoloration, defoliation, die-back, and temporary wilting. Because the plant is experiencing stress and a disruption in its normal physiological functions, it becomes more susceptible to insect and disease problems.

There are several preventative measures that can be taken to reduce the impacts of heat stress in nursery and landscape plants.

  1. Thoroughly water plants either in the evening or in the early morning before extreme temperatures occur. Water the plants deeply and use irrigation methods that minimize leaf wetness to reduce the potential for foliar diseases.
  2. Properly mulch plants to conserve water in the soil and help lower soil temperatures. Bark mulch, leaf mulch, straw, and other organic mulches will help to lower the temperature in the root zone, while gravel mulches can actually increase root zone temperatures. Be sure to provide additional water to newly mulched plants to prevent dry mulch from taking moisture away from the roots.
  3. Avoid fertilization during periods of heat stress because this can absorb moisture in the root zone and further contribute to dehydration of the plant.
  4. Avoid applying herbicides that can volatilize in high temperatures and drift, causing damage to non-target species.
  5. Pay special attention to plantings that are located next to driveways, concrete patios, or other structures that can absorb and radiate additional heat to the plants. These areas will likely require additional irrigation.

 

Additional Resources:

How to Protect Trees and Other Landscape Plants from Heat Stress

Reducing Heat Stress to Container Grown Plants

Natter’s Notes: Heat Stress

Hot Weather Takes a Toll on Georgia Landscapes

Make Sure Your Farm or Ranch Counts – And is Counted!

Did you know that according to the 2019 State Agriculture Overview for NJ, 3,900 acres of peaches yielded 5/tons per acre at a value of over $25.6 million dollars? Or that 3,500 acres of peppers were harvested in 2019, with a value of $45.8 million dollars?  Or that 9,300 acres of harvested blueberries were valued at $85.3 million dollars in 2019?  And in 2018, NJ ranked 4th nationwide in cranberry and peach production, and third in bell peppers?

[Read more…]