Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download File
Transcript
Pest Management Essential Standard 8.00Compare distinguishing chrematistics of pest. Objective 8.01 • Discuss the anatomy and life cycle of pest. What is an insect? • Small animals that have three body regions and three pairs of legs equaling six legs • Body regions – head – thorax – abdomen Types of Insects • The five types of mouthparts are important in identifying and controlling insects. – – – – – Chewing Piercing-sucking Rasping-sucking Siphoning Sponging Chewing Insects • Insects tear, chew or grind food • Examples – – – – grasshopper Beetle Cutworms Caterpillars • Damage by chewing insects includes tearing, chewing, or grinding all parts of the plant Piercing-Sucking Insects • Punctures plant and sucks the sap usually from underside of the leaves or the stem • Examples – – – – – Aphids Mealy bugs Mites Scale whiteflies • Damage causes yellow spotted leaves which result in stunted growth Rasping-Sucking insects • Rasps or breaks surface and sucks sap • Example – thrips • Damaged plant tissue becomes speckled and white Siphoning insects • Have a coiled tube they dip into liquid food such as nectar and draw it in • Example – butterflies • Siphoning insects do little to no damage to the plant Sponging Insects • Have two sponge-like structures that collect liquid food and move it into the food canal • Example – houseflies • Sponging insects can carry germs or diseases that can damage plants Life Cycles • Complete metamorphosis has four stages – – – – egg larva-worms or caterpillars Pupa- resting stage adult-flies, beetles, etc. Life Cycles • Incomplete metamorphosis has three stages – egg – Nymph- baby insect – Adult • Insects must be killed when they are feeding or actively moving on the plant Life Cycles Chewing Insects • Parts of leaves are eaten away – – – – beetles cutworms caterpillars grasshoppers Chewing Insects • Beetles – eat leaves, stems, flowers, fruit and nuts • Cutworms – usually attack stems, but may eat other plant parts Chewing Insects • Caterpillars – – – – larva of moths and butterflies fuzzy or hairy eat young leaves and stems roll up in leaves making leaves curl • Grasshoppers – eat all parts of plants Sucking Insects • • • • • • Aphids Leaf bugs Mealy bugs Scale Thrips Whiteflies Aphids • Pierce and suck juices • known as plant lice • cause stunted growth and yellow spotted leaves • causes sticky substances and black mold • will attract ants Aphids Leaf Bugs • Cause plants to look unhealthy • plants will lose their normal color and wilt Leaf Bugs Mealy Bugs • Pierce and suck from underside of leaves and in leaf axils causing yellow appearance and sticky secretions Mealy bugs Scale • Appear as black or brown raised lumps attached to stems and underside of leaves causing yellow leaves and stunted growth Scale Thrips • Chew and then suck causing plant tissue to become speckled or whitened, leaf tip to wither, curl up, or die Thrips Whiteflies • Feed on underside of young leaves causing yellowing • will look like flying little white specks when plants are shaken Whiteflies Mites • Attack underside of leaves causing gray to grayish-green spots • severe infestations cause webbing Mites
