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Orono Weekly Times, Wednesday, June 15, 1988-9 A* equestrian romp through the Tree Nursery Last Saturday afternoon a joy a romp through the Orono Of course they all rode and group of riders started out from Tree Nursery. The group was drove Morgans for the occa- the Trillium Stables on O'Chon- lead by Mrs. Samson of sion. ski Road, west of Orono to en- ' Trillium Stables. Durham East Tent Caterpillars • by Andrea Meresz Eastern Tent Caterpillar The Eastern Tent Caterpillar occurs occurs from the Maritimes to Sault Ste. Marie, in the south-east corner of Manitoba, and throughout the eastern U.S.A. The most common hosts are apple and wild cherry. Adult moths are chocolate broxyn in colour, with a pair of oblique white lines on the forewings. The. average wingspan is 3.5 cm. In late June or early July, females lây up to 350 eggs in a compact mais, which resembles grey foam, in a band around the twigs or branches branches of the tree. The larvae émerge from the egg cluster in the spring of the following year, just as the leaves are unfolding. unfolding. The young caterpillars spin a silken tent in a fork of nearby branches. They enlarge this tent as they grow. During cloudy or rainy weather, and at night, caterpillars remain within the.tent. On sunny days the larvae feed on the leaves of the host tree. Larvae of the Eastern Tent Caterpillar Caterpillar a ré dark in colour with a single white stripe down the back. They can easily be distinguished from the Forest Tent Caterpillar, which has a row of keyhole-shaped spots down the back. Both species of caterpillars are 5 cm. long when fully grown. Caterpillars mature in 6 weeks' time. In June, they wander away from the tree and pupate in brush or debris on the ground; on fences, or on buildings. Moths emerge in 2 weeks, and lay - eggs shortly after emerging. There is only only one generation each year. Forest Tent Caterpillar The Forest Tent Caterpillar is closely related to the Eastern Tent Caterpillar. Their life cycles are very similar. The Forest Tent Caterpillar is the most widely distributed species of moth in North America. It feeds on Inroad leaf trees. In northern Canada, it prefers Trembling Aspen. In southern Canada, it prefers Oak, while in the southern U.S. it feeds on gum trees. Sugar Maple is often severely defoliated, although Red Maples are untouched. Periodic infestations have been noted since 1835, and outbreaks have been reported from somewhere in Canada every year since the Forest Insect Survey was established in 1936. As with the Eastern Tent Caterpillar, Caterpillar, the Forest Tent Caterpillar overwinters within the egg cluster surrounding twigs or branches. The larvae emerge just as the leaves are unfolding. Caterpillars feed together on a branch, and move to another only when the branch is defoliated. Unlike Eastern Tent Caterpillars, Forest Tent Caterpillars Caterpillars do not form true tents, only silken mats on branches or trunks. If the entire tree is defoliated they will migrate to other trees. Large stands of susceptible forest trees may be denuded by early summer. Usually these trees will produce another crop of leaves 4 to 6 weeks later. Trees are rarely killed, and large outbreaks of this pest are most often followed by years of relatively low populations. Feeding is complete complete in mid to late June. Larvae leave the tree, spin cocoons, and emerge as moths 2 weeks later. Moths are pale brown in colour ' with' 2 dark diagonal stripes on the forewings. They are the same size as Eastern Tent Caterpillar moths. Females lay eggs in clusters on twigs or branches. There is only one generation each year. Control of Tent Caterpillars Tent caterpillar populations fluctuate fluctuate a great deal from year to year, primarily because of control by natural enemies. These include birds, predatory and parasitic insects, insects, and disease organisms. Unfavourable Unfavourable weather also limits the populations of tent caterpillars. Flomeowners can control both of these species by removing egg clusters from ornametital trees and shrubs in the winter. On cloudy, days, tents of the Eastern Tent Caterpillar with the caterpillars in them can be removed with a Stick and destroyed. Although trees may be complete ly defoliated by these caterpillars, the damage is usually more . apparent apparent ■ than real.. The use of chemical pesticides (although many products are registered) is rarely justified to control these pests. Bacterial insecticides which contain Bacillus thuringiensis, however, are available, which can be used as a biological control of young larvae. This insecticide is specific to caterpillars caterpillars and will not harm beneficial insects and bees. Bacillus thuringiensis thuringiensis formulations should be applied early in the spring when the larvae are small, because it must be ingested to be effective. At this time of year (June), spraying spraying insecticides for the control of these pests is not recommended because most of the damage has been done, and the larvae will soon leave the trees to pupate. The presence of the caterpillars around the house is only a temporary nuisance, as they will soon pupate and then change to moths. Come and Witness The Creation of Weird and Wonderful Hair ' Styles ON-:MAIN STREET SATURDAY, JUNE 18th (From 11:00 a.m. until 2:00 p.m.) CREATED BY ÔUR WEIRD AND WONDERFUL STAFF PLUS SATURDAY SPECIAL SUNLIFE BY GOLDWELI BECK GEL CARE LOTION HAIR & BODY SHAMPOO ALL THREE FOR ONLY $26.00 Hair With Flair The Northumberland and Newcastle * Board of Education TENDER PUPIL TRANSPORTATION Tenders are invited to supply a 72 passenger school bus and driver for the transportatien of pupils to Courtice Secondary School, R'.R. #3, Bowmanville, Ontario. Sealed tenders clearly marked "Pupil Transportation" will be received by: John Stephenson - . • Manager of Transportation and Planning The Northumberland and Newcastle Board of Education 834 D'Arcy Street North Gobourg, Ontario , K9A 4L2 until 3:00 p.m. on Tuesday, 5 J^uly, 1988. Conditions, specifications and tender forms are available at the same address. ( All queries regarding this requirement are to be directed to the Transportation Department. ' , Telephone: (416) 372-6871 Date of Publication: June 15, 1988 , . P.O. 88-98929 Letter to the Editor Dear Roy: On the week-end of June 3, 4 and 5 1 experienced something that happens happens once in a lifetime - my High School Reunion. A week-end I will think of many times in the future. I want to thank the committee which made this event possible. Without their time and dedication to organize this reunion, Clarke Grads would not have been reunited. reunited. You did it so well and I am grateful. Nancy (Hallowell) Scott '68