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KENTUCKY PEST NEWS ENTOMOLOGY • PLANT PATHOLOGY • WEED SCIENCE on Line At KENTUCKY PEST NEWS ENTOMOLOGY • PLANT PATHOLOGY • WEED SCIENCE On line at: www.uky.edu/Agriculture/kpn/kpnhome.htm Number 1118 February 26, 2007 ANNOUNCEMENTS FORAGE CROPS • Plant health progress articles may be of interest to UK • Phoenix alfalfa has substantial resistance to sclerotinia agents and specialists crown and stem rot • Integrated Pest Management School is March 7 LIVESTOCK TOBACCO • Cattle insecticide ear tags: points to consider • Preventive control options for tobacco aphids HOUSEHOLD • Overwintering bugs appearing in buildings ANNOUNCEMENTS presented in the journal Plant Health Progress is one of the PMN resources available to U.K. employees. Of the INTEGRATED PEST MANAGEMENT SCHOOL titles published in this journal during the last 18 months, IS MARCH 7 there are many that could be of interest to Kentucky County Extension Agents and State Specialists. Of the The IPM Training School will be Wednesday, March 7 at dozens of articles, titles relating to landscape plants and the UK Research and Education Center in Princeton. Top- fruit crops are listed below and mention is made of addi- ics to be covered at the training include: Bringing Fallow tional field crop, vegetable and turfgrass topics recently Land Back into Production, Soybean Rust Up-date, Spray published in this journal. Technologies for Controlling Rust, Advances in Bt Varie- ties, Seed and Foliar Applied Insecticides, Soybean Stem Landscape plants and trees titles that may be of interest: Borer and Soybean Aphid. The afternoon will end with a session on weed identification. •Host Range of Itersonilia perplexans and Management of Itersonilia Petal Blight of China Aster. Registration will open at 8:30 a.m. with the meeting start- •Lilium lancifolium is Discovered as a New Host of Bot- ing at 9 a.m. and ending at 4 p.m. The program is free and ryosphaeria parva in Georgia. lunch will be provided. To guarantee a lunch, register by •First Report of Phytophthora ramorum Infecting Camellia March 5 by calling 270-365-7541, ext. 216 or e-mail plu- Flower Buds in North America. [email protected]. •First Report of Association Between Delphinium and Peziza repanda. Program is approved for 5.5 hours of continuing educa- •First Report of Phytophthora cambivora on Hybrid Rhodo- tion units for certified crop advisers – 2 in pest manage- dendron in North Carolina. ment, 1.5 in crop management, and 2 in soil and water •The Occurrence of Phytophthora ramorum in Nursery management. The meeting will offer 3 General hours and Stock in California, Oregon, and Washington States. 1 Specific hour of continuing education for Pesticide •Illustration of Key Morphological Characteristics of Safety Education hours for categories 1a, 10 and 12. Phytophthora Species Identified in Virginia Nursery Irrigation Water. PLANT HEALTH PROGRESS ARTICLES MAY •Biology and Distribution of Pryeria sinica, a New Pest of BE OF INTEREST TO UK AGENTS AND Euonymus Found in Virginia and Maryland. SPECIALISTS •First Report of Powdery Mildew of Mahonia aquifolium (Pursh.) Nutt. Caused by Erysiphe (Microsphaera) ber- by John Hartman beridis (DC.) Lév in Canada. •Phytophthora hibernalis: A New Pathogen on Rhododen- County Extension Agents and State Extension Specialists dron and Evidence of Cross Amplification with Two are likely aware that because U.K. is a partner, they have PCR Detection Assays for Phytophthora ramorum. access to the on-line Plant Management Network (PMN) •Comparing Diagnostic Protocols for Phytophthora and its resources. For example, applied research articles ramorum in Rhododendron Leaves. Turfgrass research articles on the following topics: •Phytophthora Root Rot and Stem Canker Found on •Pathogenicity of Bipolaris and Curvularia spp. to Bermu- Nordmann and Subalpine Fir in Norwegian Christmas dagrasses and fungicides for spring dead spot. Tree Plantations. •Fungicides for Pythium blight in overseeded turfgrasses. •Control of Phytophthora Root Rot in Field Plantings of Fraser Fir with Fosetyl-Al and Mefenoxam. Pest Management titles: •Effects of Azoxystrobin Rate and Treatment Interval on •The Establishment of a National Pest Information Plat- the Control of Rhabdocline pseudotsugae on Douglas- form for Extension and Education. fir Christmas Trees. •Synopsis of Fungi Listed as Regulated Plant Pests by the •Rhabdocline Needlecast Increases Needle Loss of Doug- USDA Animal and Plant Health Inspection Service: las-fir Christmas Trees. Notes on Nomenclature, Disease, Plant Hosts, and Geo- •Abnormal Leaf Development on White Oaks Linked to graphic Distribution. Drift of Chloroacetamide Herbicides. The articles and topics listed are from only one journal, Fruits: Plant Health Progress. The PMN includes other on-line •Identifying and Characterizing Summer Diseases on journals, all with color photographs to help illustrate re- ‘Babygold’ Peach in South Carolina. search results. In addition, PMN offers resources such as •Differentiation of Isolates of Glomerella cingulata and Col- the image database and the Arthropod Management Tests letotrichum spp. Associated with Glomerella Leaf Spot and Plant Disease Management Reports publications and Bitter Rot of Apples Using Growth Rate, Response which provide plant management information and tools to Temperature, and Benomyl Sensitivity. for Extension Agents and Specialists. U.K. Agents and •Penicillium expansum Invades Apples Through Stems Specialists can easily subscribe to the Plant Management during Controlled Atmosphere Storage. Network for free by going to http:// •Postharvest Fruit Rots in d’Anjou Pears Caused by Bo- www.plantmanagementnetwork.org/. Click on sub- trytis cinerea, Potebniamyces pyri, and Sphaeropsis pyripu- scribe, then personal subscriptions, then complimentary trescens. personal subscriptions, then University of Kentucky, and •Control of Strawberry Black Root Rot with Compost take it from there. Socks. •Efficacy of Selected Insecticides for Management of the TOBACCO Multicolored Asian Lady Beetle on Wine Grapes Near Harvest. PREVENTIVE CONTROL OPTIONS •Influence of Berry Injury on Infestations of the Multicol- FOR TOBACCO APHIDS ored Asian Lady Beetle in Wine Grapes. by Lee Townsend •Use of Petroleum Derived Spray Oils in Washington Grapevine Powdery Mildew Management Programs. The very successful preventive approach to aphid control •First Report of Raspberry bushy dwarf virus in Ohio. on tobacco is based on the use of new products in the neonicotinoid class- clothianidin (Belay), imidacloprid Field crops research articles on the following topics: (Admire), and thiamethoxam (Platinum). The mode of •Wheat stripe rust and on Fusarium head blight includ- action of these insecticides is based on nicotine, which ing risk forecasting. acts on the central nervous system of insects to produce •Corn mycotoxin and fumonisin levels as related to nerve excitation and the paralysis which leads to death. chemical and fertilizer treatments. Their solubility in water allows for uptake and movement •Soybean diseases including resistance to Asian soybean in plants, giving them a significant systemic effect, espe- rust, discovery of Rhizoctonia foliar blight, and virus cially on sap feeding insects such as aphids. Slow break- disease incidence. down in the plant gives long term pest control. These products belong to the 4a group based on mode of action. Vegetable crops research articles on the following topics: •Fungicides for potato early and late blight diseases. UK tobacco insecticide evaluations have shown Belay, •Insecticides to manage cucumber beetles in zucchini Admire, and Platinum to provide excellent preventive squash and row covers to suppress muskmelon bacte- aphid control by tray drench or transplant water applica- rial wilt. tion compared to untreated tobacco. No statistical differ- •Greenhouse tomato Botrytis gray mold management ences have been seen between products or application and disease management products in organically- methods more than 60 following transplant and no statis- produced tomatoes. tical differences have been seen in aphid control using •Impatiens necrotic spot virus in peppers. low or high label rates. 2 KPN—February 26, 2007 Insecticide Rate Clothianidin Belay 16% WSG 10 oz per acre Imidacloprid Admire 2F – 2 lbs/gal 1 fl oz/1,000 plants tray drench for aphids 1.4 fl oz/1,000 plants tray drench for aphids Admire Pro – 4.6 lbs/gal 0.6 f l oz/1,000 plants – tray drench for aphids 0.8 fl oz/1,000 plants - transplant water for aphids Platinum – 2 lbs/gal 0.8 to 1.3 fl oz/1,000 plants Thiamethoxam Belay 16 WSG (Arysta Lifescience) lists aphid and flea ted wilt virus at higher rates. Apply as a tray drench not beetle control. Caution: Causes moderate eye irritation. more than 7 days prior to transplanting. Generic imida- Soil applications may sometimes cause yellowing of foli- cloprid products are available, such as Alias 2FM and age present at the time of transplanting. This effect does Couraze 2F. not have any impact on growth and yields. Platinum (Syngenta) lists flea beetle, Japanese beetle, Admire 2F and Admire Pro (Bayer) lists mole crickets (no thrips, and wireworm control. Apply as a tray drench not problem in Ky), whiteflies (no problem in Ky), and wire- more than 2 days prior to transplanting. During trans- worms, plus suppression of cutworms and tomato spot- planting, workers handling plants must wear waterproof gloves. FORAGE CROPS hot, dry spells. PHOENIX ALFALFA HAS SUBSTANTIAL Although a handful of cultivars with partial resistance to RESISTANCE TO SCLEROTINIA CROWN AND SCSR do exist, the level of
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