Ent - Pests of plants 1.5 Billion dollars a year in the US...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Pests of plants 1.5 Billion dollars a year in the US Types of injury to plants Leaf feeders Japanese beetle Bean Leaf beetle Borers Attack trunks, limbs, and stems eat phloem which stops flow of nutrients to plant Fluid feeders feed on plant sap made of phloem aphids can transmit disease Fruit and seed feeders fruit fly Coneworm Gall Makers Utilize growth hormones causing abnormal plant growth Diseases Viral Bacterial Fungal Nematode almost all plant viruses are transmitted by insects Mosaic Yellows No cure, must physically remove infection Diseases Dutch Elm Disease Caused by bark beetles or by root grafting effects leaves no cure huge problem in Canada in the 80's 3 new resistant elm varieties Tobacco and Mosaic virus chewing insects transmit virus Foliage turns yellowish or dark green irregularly Plum Pox recent disease infects plant fruit transmitted by aphids Some Especially Bad Pests ** European Corn Borer ** more than 1 billion dollars damage annually attack 200 different types of plants
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
corn soybean wheat cotton Eats inside of plant stalks causing collapse different number of generations per year making control harder Southern Green Stink Bug Causes 5 million dollars worth of damages annually Feeds on Cotton peaches tomatoes seeds, etc. pecans ornamental plants Big problem in South America Locust Africa and the Middle East 80 million dollars annually Swarms of 4-50 million at times have been known to cover 20% of the worlds landmass Japanese Beetles feed on over 400 species of plants roses beans grapes blueberries are leaf skeletonizers traps are a popular form of control Pests in Homes 1 Urban Pests House Mites Common cause of allergies need more than 50% humidity to grow Feed on humans bedbugs lice mites Follicle mites live in facial areas found in 10-20% of children and nearly 100% of aged causes acne Feed on pets ticks fleas Ants Hymenoptera may nest in void walls primitive ants sting
Background image of page 2
more advanced species have acid squirting system Red fire ant Comes from Brazil 11 Southern states icld. VA Carpenter Ant Problem in northern US like moist wood move wood to form nests similar to termites treatment insecticide poured directly in mound must reach the queen bait formulations also work Cockroaches Egg capsule (ootheca) contains 10 to 40 eggs very high reproduction rate Nocturnal, like dark moist and vertical places contaminate food and spread disease E coli Salmonella Strep throat allergens Control remove food eliminate hiding and resting places Chemicals place insecticides where roaches are commonly found
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/19/2008 for the course ENT 2004 taught by Professor Jrvoshell during the Fall '07 term at Virginia Tech.

Page1 / 11

Ent - Pests of plants 1.5 Billion dollars a year in the US...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online