WA Aquatic Pest Control Test Questions And Answers Verified 100% Correct

WA Aquatic Pest Control Test Questions And Answers Verified 100% Correct slope ratio to prevent establishment of emergent and bank weeds - ANSWER -1:1 or 1:1.5 slope to control plants in lakes, canals, ponds, ditches - ANSWER -construct so they can be drained if needed, can dry out to control plants depending on fish populations east of cascades, waterline plants - ANSWER -redtop at waterline, crested wheatgrass on soulders of ditchbank cleaning canals - ANSWER -chaining practical, draglines, backhoes, excavators, weed harvesters for lakes and some canals burning ditchbank weeds - ANSWER -sear green veg, then burn 7-10 days later, obtain permit from Ecology grass carp - ANSWER -used for vegetative control w approval from WDFW four factors of aquatic herb application - ANSWER -char of environment, water use, char of water, herbicide for floating and emersed weeds: - ANSWER -sprayable formulations and surface water applications for submersed weed control: - ANSWER -sprayable and granular formulations bc they sink to bottom granular herbicide application rates - ANSWER -based on surface area or total water volume treatment granular herbicide advantages: - ANSWER -treatment confined to bottom, long contact time w plants, can be nontoxic to fish for large impoundments, improve plant control by: - ANSWER -max application rates, treat large water areas at one time, apply herb during time of minimal wind, use bottom treatment in deep water, use granular formulations, use quickly absorbed herb fish management is for 1 and 2 - ANSWER -1) remove undesirable species and 2) attempt est of desirable balance of game fish forage fish - ANSWER -carp, bullhead, perch, suckers carp - ANSWER -warm, slow moving water, lakes, or ponds bullhead - ANSWER -quiet, mud bottomed aquatic perch and suckers - ANSWER -lakes and streams mechanical fish barriers - ANSWER -seines, nets, traps, weirs, barriers, size selective but not completely effective rotenone - ANSWER -only piscicde registered for fish control downstream fish kills - ANSWER -are the legal responsibility of those who applied the chemical detoxification time - ANSWER -a week to a month depending on alkalinity, temp, turbidity, etc, can decreased it by adding potassium permanganate mosquitos are distinguished by - ANSWER -1)numerous scales on bodies, wing veins, and wing edges and 2) females that have distinct blood sucking proboscis, undergo complete metamorphosis mosquito eggs out of the waterline hatch - ANSWER -with the rise of the water level mosquito eggs in ground depressions hatch - ANSWER -after being immersed by flood, irrigation, or melting snow waters mosquito eggs on water surfaces hatch - ANSWER -after an incubation period of several days mosquito eggs deposited out of the water hatch - ANSWER -when dissolved oxygen content of water is at proper level or summer diapause is broken mosquito larvae - ANSWER -four developmental instars, 4-10 days mosquito pupae - ANSWER -tumblers, do not feed, remain active, 3 days mosquito adults - ANSWER -males live 7-10 days, females 2 weeks-months, most produce multiple broods Aedes - ANSWER -overwinter as eggs, larva in snow melt pools, irrigation, flood water, tree holes, artificial containers, most common mosquito culex - ANSWER -larva in clean water in still, stagnant water, polluted ponds, flooded fields, containers, etc, cities and towns culiseta - ANSWER -larva clean water in artificial containers, ponds etc, large mosquitos coquillettidia - ANSWER -larva pools with vegetation, freshwater marshes, larva acquire oxygen through plants, overwinter as larvae anopheles - ANSWER -larva in impounded pools, water in sun or shade, larva lie horizontal to water surface adult mosquito surveying methods - ANSWER -light traps, animal bait traps, CO2 traps, sweep nets, and aspirators, biting collection