VIRGINIA COMMERCIAL PESTICIDE APPLICATORS CORE EXAM / STUDY GUIDE LATEST VERSION / QUESTIONS AND CORRECT ANSWERS / A GRADE SCORE SOLUTION.

VIRGINIA COMMERCIAL PESTICIDE APPLICATORS CORE EXAM / STUDY GUIDE LATEST VERSION / QUESTIONS AND CORRECT ANSWERS / A GRADE SCORE SOLUTION. Explain the difference between key pests, occasional pests and secondary pests - CORRECT Answer Key pests are nearly always present and require regular control. occasional pests are migratory or cyclical and require intermittent control. secondary pests require control only under certain conditions, such as the elimination of a key pest or the absence of a natural host. what should you do first if you see damage to a plant, animal, or valuable product/ - CORRECT Answer identify the cause what should you do first if you discover a pest that may need to be controlled? - CORRECT Answer make sure the pest is actually responsible for the damage. then accurately identify the pest how can pest identification help you develop a good pest control strategy? - CORRECT Answer it allows you to determine basic information about the pest, including its life-cycle and when it is most susceptible to control measures. name the 5 basic pest groups - CORRECT Answer weeds, parasites and diseases, mollusks, arthropods, and vertebrates. why do weeds present such a challenge to pest managers? - CORRECT Answer weeds are often hardy, aggressive, and tolerant of harsh conditions. many produce large numbers of seeds which can spread over a wide area and remain dormant for a long time. how can you tell a monocot from a dicot? - CORRECT Answer monocots (sedges and grasses) have one cotyledon, parallel leaf veins, flower parts in multiples of 3 and fibrous roots. Dicots have 2 cotyledons, broad leaves with netted veination, and flower parts in multiples of 4 and 5 and usually have taproots. name the pathogens that cause most plant and animal diseases - CORRECT Answer fungi, bacteria, mycoplasma, and viruses what are the symptoms of viral plant diseases - CORRECT Answer stunting, yellow rings on leaves, wilting, and mosaic patterns how do plant parasitic nematodes harm plants? - CORRECT Answer by attacking the roots, stems and leaves. nematode root feeding interferes with a plants ability to take up water and nutrients. infected plants wilt and seem to be suffering from a lack of water or nutrients.