Virginia Commercial Pesticide Applicators CORE exam

Virginia Commercial Pesticide Applicators CORE exam with answers 100% A+ score. Explain the difference between key pests, occasional pests and secondary pests - correct answers.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 ify the cause what should you do first if you discover a pest that may need to be controlled? - correct 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 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 , parasites and diseases, mollusks, arthropods, and vertebrates. why do weeds present such a challenge to pest managers? - correct 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 ots (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 , bacteria, mycoplasma, and viruses what are the symptoms of viral plant diseases - correct ing, yellow rings on leaves, wilting, and mosaic patterns how do plant parasitic nematodes harm plants? - correct 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. how do mollusks harm plants? - correct feeding on foliage and fruit. mollusks reduce the value of commercial produce if they feed on harvested plants and fruit. what are arthropods? how do they differ from vertebrates? - correct opods are animals with segmented bodies and jointed appendages. Arthropods have an external skeleton and may have specialized appendages such as sucking tubes, chewing mouth parts, antennae, and pincers. they have no backbones like vertebrates what is the difference between gradual and complete metamorphosis? why is it important to know the life cycle stage of an insect? - correct al metamorphosis includes 3 stages: egg, nymph and adult. there is no pupa stage. complete metamorphosis includes 4 stages: egg, larva, pupa, and adult. insects that develop via complete metamorphosis change body form. larvae may not look at all like adults within the same is very important to recognize the damaging stage for best treatment results. many insect are pests in one stage but not another. especially larval form. what are beneficial insects? and why are they important to agriculture? - correct ts that are pollinators (bees and butterflies) or pest predators (ladybeetles and lacewings). with out pollinators many types of plants could not reproduce and beneficial predators feed on harmful insects, mites, and weeds. how do mites harm plants? - correct answers.They suck the plant juices, eat the underside of leaves, and disfigure the plants they feed on. what is an economic threshold? - correct level at which economic losses caused by pest damage, if the pest population continued to grow, would be greater than the cost of controlling the pests. reaching an economic threshold usually prompts some kind of pest control action. how are thresholds important to a sound pest control strategy? - correct ng a treatment or action threshold is essential to prevent the pests in an area from causing unacceptable injury or harm. action thresholds vary: sometimes one pest is too many (like a rat in a food processing facility). Thresholds help producers and applicators weigh the cost of pest control against the cost of a pest infestation what is monitoring and how is it important to a sound pest control strategy? - correct ar checking or scouting for pests in a designated area. Monitoring will tell you what pests are in an area, how many are in the area, and how much damage they are causing. it will help determine if the pest population has reached the treatment threshold and whether control measures have worked.