Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
9 Cards in this Set
- Front
- Back
|
list the 2 categories of mechanical coantrol and the 3 and 6 subcategories of each, respectively |
1. physical exclusion -crushing -removal -exclusion 2. environmental manipulation -light -sound -moisture -temperature -electricity -electromagnetic energy |
|
|
explain exclusion and give some examples |
-barriers and adhesives
example: plastic lined trenches for colorado potato beetle, gravel barriers, mesh windows, sticky banding around trees to catch insects that walk |
|
|
explain removal and give some examples |
literally removing the bugs -examples: bug vacuum, handpicking |
|
|
explain temperature as an environmental manipulation tactic. and the 4 types of high temperature treatments |
use unfavourable temperatures over a long period of time to reduce insect activity and eventually cause death -can't do it in the field but can do it post-harvest -also definitely for export products, shock em in cold for a period of time first 4 high temp treatments: 1) dry heat - high pressure hot air for circulation 2) wet heat - hot water dipping, more effective than dry heat but probably more work intensive (e.g. for greenhouse ornamentals, dip em) 3) steam - for cleaning contained spaces like greenhouses 4) burning - modify propane flamers for example, space out so they flame between crops. good for things that develop resistance quickly like colorado potato beetles 3) steam 4) burning |
|
|
explain moisture as an environmental manipulation tactic |
decreasing RH can affect oviposition of pests, but also the activity of predatory insects -spray plants with cold water to dislodge aphids |
|
|
explain electromagnetic energy as an environmental manipulation tactic |
-long wavelength: for heat, mostly. but only really effective indoors -medium wavelenth: light and UV radiation for light traps -short wavelength: <1 nm, for sanitizing stored products |
|
|
explain sound as an environmental manipulation tactic |
-goal is to repel insects or modify behaviour, has been done in lab but not in field/commercial situations |
|
|
explain light as an environmental manipulation tactic |
different coloured light can attract or repel insects -use light traps in greenhouses -or use yellow bulbs that don't attract insects |
|
|
explain electricity as an environmental manipulation tactic |
e.g. electric fly swatters, or electric grates that are used with light traps |
