Fruit Pest Message for May 4, 2007
Tree Fruit Development- In most locations, peaches are in bloom, pears at white bud or bloom, apples late tight cluster to pink. Apple bloom soon in warmer locations!!
New England Tree Fruit Pest Management Guide – This long-awaited guide will include pest management for all the tree fruits- apples, pears, and stone fruits. The New England fruit specialists have a new arrangement with our colleagues at Cornell University. We have reviewed the Cornell Tree Fruit Production Guide and adapted it for the New England region. In particular, all pesticide recommendations have been carefully reviewed because there are some differences in pesticide registrations that occur between New York and New England. It is expected to arrive from the printer next week and will be available from the UConn Communications and Information Technology Office; Unit 4035; 1376 Storrs Rd.; Storrs, CT 06269 or (860)486-3336. If you are a Connecticut grower, please purchase from UConn because each New England state has ordered the number of copies we feel is appropriate for our growers.
Insect update- Traps are up for tarnished plant bug (low, white sticky traps), apple blotch leafminers (low, red sticky traps) and European apple sawfly (high, white sticky traps). As of yesterday, I had not seen any sawflies and tarnished plant bug captures have been very low. Leafminers started to emerge this week and were quite high in one location.
Apple Scab Status – I now have weather stations at seven orchard locations throughout the state. Below is this week's summary for five of them which includes the location, date weather data was downloaded, dates when apple scab infections occurred, percent spore maturity and the degree days for apple scab development. The degree days for apple scab are calculated with a base of 32 degrees and start at 50% McIntosh green tip in each location. This occurred on April 20th in South Glastonbury and April 21st in the other locations. Note that the "accelerated" phase of apple scab occurs between approximately 300 to 700 degree days (DD). This is the time when most of the apple scab ascospores mature; therefore, the critical time for scab treatments. We are at or approaching 300 DD at all of these locations.
Bottom Line- It's a critical time for apple scab. Luckily, the weather looks dry for quite awhile.
Summary of Apple Scab Data throughout the State
So. Glastonbury- April 30th
Pomfret – April 30th
East Lyme – May 2nd
Gales Ferry- May 2nd
Lebanon- May 3rd
Lorraine Los
Fruit Crops IPM
Coordinator
Plant Science Department, U-4067
University of Connecticut
Storrs,
CT 06269-4067
(860)486-6449
(Phone)
(860)486-0682 (Fax)
Lorraine.Los@uconn.edu
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This information was developed for conditions in the Northeast. Use in other geographical areas may be inappropriate.
The information in this material is for educational purposes. The recommendations contained are based on the best available knowledge at the time of printing. Any reference to commercial products, trade or brand names is for information only, and no endorsement or approval is intended. The Cooperative Extension system does not guarantee or warrant the standard of any product referenced or imply approval of the product to the exclusion of others which also may be available.All agrochemicals/pesticides listed are registered for suggested uses in accordance with federal and Connecticut state laws and regulations as of the date of printing. If the information does not agree with current labeling, follow the label instructions. The label is the law.Warning! Agrochemicals/pesticides are dangerous. Read and follow all instructions and safety precautions on labels. Carefully handle and store agrochemicals/pesticides in originally labeled containers immediately in a safe manner and place. Contact the Connecticut Department of Environmental Protection for current regulations.The user of this information assumes all risks for personal injury or property damage.Issued in furtherance of Cooperative Extension work, Acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture. Kirklyn M. Kerr, Director, Cooperative Extension System, The University of Connecticut, Storrs. The Connecticut Cooperative Extension System offers its programs to persons regardless of race, color, national origin, sex, age or disability and is an equal opportunity employer.