{"id":2005,"date":"2020-05-30T08:49:20","date_gmt":"2020-05-30T08:49:20","guid":{"rendered":"http:\/\/termirepel.com\/blog\/?p=2005"},"modified":"2020-05-31T16:53:42","modified_gmt":"2020-05-31T16:53:42","slug":"allium-leafminer-a-new-invasive-pest","status":"publish","type":"post","link":"https:\/\/www.termirepel.com\/blog\/allium-leafminer-a-new-invasive-pest\/","title":{"rendered":"Allium Leafminer – A New Invasive Pest"},"content":{"rendered":"\n
The allium leafminer (also known as the onion leafminer) came originally from Central and Eastern Europe, where it’s a serious pest on leeks, onions, and chives. It has been spreading outwards in the last 20 years and is now found throughout Europe. Later, it was spotted in Lancaster County, PA, in December 2015, making it the first confirmed infestation in the western hemisphere. <\/p>\n\n\n\n
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The pest is seen targeting onions, leeks, garlic, chives, shallots, as well as green onions, with leeks being described as the most damaged host. <\/p>\n<\/div><\/div>\n\n\n\n
Leaf mining takes place\nmostly from April to May and from October to November. However, the damage is\nmost obvious later, once rotting has set in, so is usually seen\nin overwintering leeks between December and February, and in onions in\nJune.<\/p>\n\n\n\n
One of the first symptoms\nyou will notice on plants is wavy, curly, and distorted leaves, upon closer\ninspection, you will be able to see puncture marks along the sides of the\nleaves toward the distal end.<\/p>\n\n\n\n
The fly larvae mine the plant leaves and move toward the bulb and leaf sheaths where they pupate. Exactly where they pupate in the plant may vary depending on bulb and leaf size. To check for larvae, the plants must be pulled out of the ground and the leaves pulled back.<\/p>\n\n\n\n
Penn State Extension photo Marks made by the female leafminer when she lays her eggs. <\/figcaption><\/figure><\/div>\n\n\n\n
Leaf symptoms of adult\nallium leafminer activity were observed on scallion and wild garlic in\nLancaster, York and Perry counties on March 17 and 18. This is about one month\nearlier than we normally see the spring flight of this potentially devastating\npest of all allium crops \u2014 onion, shallot, garlic, chives, leek \u2014 in this part\nof Pennsylvania.<\/p>\n\n\n\n
I have found adult\nflies and damage on scallions at the Penn State Research Center in Landisville\nand have noted increasing fly numbers and damage on chives, onions and\nornamental allium in my home garden. Based on the amount of observed damage and\nthe number of flies seen, the population is building and more flies will be\nseeking allium crops to lay their eggs in over the next few weeks.<\/p>\n\n\n\n
Controls sought for pest threatening Black\nDirt onions<\/h4>\n\n\n\n
By Judy Rife\n\u2502Times Herald-Record \u2502March 5, 2019<\/p>\n\n\n\n
PINE\nISLAND \u2013 Preliminary research has begun to identify controls for the allium\nleafminer, the new pest that poses a threat to Orange County\u2019s signature onion\ncrop, but the battle is far from over.<\/p>\n\n\n\n
That\nis the message growers heard Tuesday at Cornell Cooperative Extension\u2019s annual\nonion school, a day-long event held at the Pine Island Fire Department.<\/p>\n\n\n\n
\u201cThe\nquestion everybody has that we can\u2019t answer yet is \u2018Will it cause economic\ndamage to the bulb onion crop?\u2019 \u2033 said Brian Nault, a professor of entomology\nat Cornell University, explaining the pest is still getting established.<\/p>\n\n\n\n
\u201cSo\nfar,\u201d he continued, \u201cseeded and transplanted onions have escaped, which is not\nthe case with garlic, leeks, spring onions and chives where we have seen as much\nas 75 percent damage.\u201d<\/p>\n\n\n\n
Cornell\u2019s\nteam is working in tandem with a team at Penn State. The two universities\nreceived $325,000 from the U.S. Department of Agriculture last year to study\ncontrols for the leafminer over the 2019 and 2020 growing seasons.<\/p>\n\n\n\n
New insect\npest a threat to onion and related crops in Pennsylvania<\/h4>\n\n\n\n
UNIVERSITY PARK, Pa. — An insect never before found in the Western Hemisphere has been discovered in Pennsylvania, and agriculture officials are asking growers and home gardeners to help monitor and manage the new invasive pest. <\/p>\n<\/div><\/div>\n\n\n\n
“It is now present\nthroughout Europe, reaching the United Kingdom in 2004,” Fleischer said.\n“It recently has been reported in Asia, Turkey, Russia and\nTurkmenistan.”<\/p>\n\n\n\n
“High rates of infestation have been\nreported,” Fleischer said. “There can be from 20 to 100 pupae per\nplant, and 100 percent of plants in a field may be infested.”<\/p>\n\n\n\n
Is there any solution available to\ncombat these pests?<\/p>\n\n\n\n
Yes, to get rid of these pests we have\nan eco-friendly solution!<\/p>\n\n\n\n
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