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Plant Science 1024 Test 4, Notes B

by: Emily Geels

Plant Science 1024 Test 4, Notes B AGPS 1024-001

Emily Geels
Arkansas Tech University
GPA 3.73

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About this Document

Here is what we covered during the plant sale.
Principles of plant science
Dr. Collins
Class Notes
25 ?




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This 3 page Class Notes was uploaded by Emily Geels on Friday April 22, 2016. The Class Notes belongs to AGPS 1024-001 at Arkansas Tech University taught by Dr. Collins in Spring 2016. Since its upload, it has received 19 views. For similar materials see Principles of plant science in Agriculture and Forestry at Arkansas Tech University.

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Date Created: 04/22/16
Plant Science 1024 with Dr. Collins Test #4 Material A. Weed Classification 1. Grouping together weeds whose similarities are greater than their differences 2. Every weed is either terrestrial or aquatic 3. Woody vs. herbaceous 4. Tree vs. shrub vs. grass 5. Life cycle 6. Scientific classification B. There are seven main methods of weed control 1. Mechanical a. Tilling b. Mowing 2. Crop competition a. Crop plant up fast to shade out weeds b. For every lbs. of weed growth, the soil produces one less lb. of crop. 3. Crop rotation a. Changes cultural habits 4. Biological a. Controlling a weed through its natural enemies i. Insects ii. Diseases iii. Allelapathic affect (natural plant toxin) iv. Fish b. For a biological to work i. Adapted to climate ii. Must reproduce faster than weed iii. Don’t let it get out of hand 5. Fire 6. Chemical (24-D) a. Pre-plant treatment- made before the crop is planted b. Pre-emergent treatment- applied after crop is planted, but before the crop comes up c. Post-emergent- applied after the crop has emerged d. Broadcast application- blanket application of the entire area e. Band treatment- applied on either side of crop row f. Directed spray- (round up wand)applied to a particular plant g. Integrated pest management- never really relies completely on chemicals C. Insects 1. Entomology 2. Three characteristics of an arthropod: a. Paired, jointed appendages b. Exoskeleton c. Bilaterally symmetrical 3. Two main classes: a. Arachnida - 2 main body segments - 4 pair of legs - Usually wingless b. Insecta - 3 main body segments - 3 pair of legs - Usually winged 4. Why are insects such a powerful force? a. Small/ easy to hide b. Flight allows for escape c. Reproduce rapidly d. Adaptable to different locations e. 2 different life cycles - Complete metamorphosis  Egg, larvae, pupae, adult - Incomplete metamorphosis  Egg, young, adult (morph by molting) - Larvae causes most damage to crops  Maggot  Minor  Caterpillar  Grub  Weevil  Slug  Borer - The damage done to crops is feeding, not an attack - Insects carry disease 5. Two mouth parts a. Chewing mouth b. Sucking mouth D. Several types of control for insect disease 1. Legal controls a. Quarantine b. Inspection at port entry 2. Cultural control a. Rogue b. Surgery c. Crop rotation d. Sanitation 3. Physical control a. Treated with chemicals/ hot water b. Traps 4. Chemical control a. Pesticide i. Insecticide ii. Fungicide iii. Herbicide iv. Algaecide 5. Three main applications a. Spraying b. Dusting c. Fumigant d. Integrated pest management (combo)


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