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Master Gardener Entomology Module   2010
 

Master Gardener Entomology Module 2010

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This presentation was given to Alabama Master Gardener interns in February 2010.

This presentation was given to Alabama Master Gardener interns in February 2010.

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  • Injury is the effect of insect on plant.
  • Cucumber mosaic virus: >60 aphid species are capable of transmitting CMV in nonpersistent virus – virus is acquired within 1 min of feeding but can be transmitted within a short duration of time (stylet-borne inoculum)Potato virus Y: aphids can acquire the virus in less than a minute and has to be transported very quickly to a healthy plant in a minute or so. Aphids may retain the virus for 24 h.
  • Define the problem: Record the normal & abnormal charactersKeep written notes & take pictures (blogging?)Examine entire plant in its ecosystemLook around: is something affecting one plant or a group of plants?Look for patterns:Nature is random!If patterns exist on plant or a group of plants…abiotic problem? (e.g., herbicide injury, storm injury to plants, etc.)Biotic sources affect plants randomly (e.g., insect, diseases)Biotic problems change location between yearsScouting procedure:If you have found the problem, mark the problem area with sticks, garden stakes, tall flags, etc.Familiarize yourself with sampling techniques and sample preparationTake a closer look at plants, uproot plants if feasibleAsk the experts before spending money on control!Delineate time-development:Biotic problems may spread slowly in an area and a pattern may appearAbiotic problems develop faster and patterns are obviousKeep an eye on the marked area and sample frequently to be able to “encounter” the problem (random) Determine the cause of injury:Think broadly >> narrow down to few causes ORUse the process of elimination to arrive at a solutionUse all resources you have to ID insects, many on the webFind the economic threshold: doing nothing is also OK
  • Trends in FAW population were stronger than BAW seen before. FAW pressures were high in all parts of AL. There were at least two generations detected one month apart of FAW in north central AL. Three peaks could be detected one month apart in south AL along the Gulf Coast. Impact of weather parameters was also stronger on FAW populations than BAW.

Master Gardener Entomology Module   2010 Master Gardener Entomology Module 2010 Presentation Transcript