2 Life inside an acorn What do you know about oak trees& acorns? There is a whole world that we overlook everyday & we will discover this wonderful world with this labBE EXCITED!!!!!! WOOT WOOT!
3 Acorn InsectsOver 100 species of insects feed on the nuts of North American treesincluding acornsproduced by oaks.We will be focusing on the interactions of:acorn weevilsacorn mothfilbertwormWaspsThese insects destroy so many nuts that it is difficult for trees to reproduce.
4 Acorn Weevil 1/2 inch long have snouts with small, saw like teeth. two types of acorn weevilthe long-snouted acorn weevilssnout equal to or greater than length of body.Eat acorns still attached to treeshort-snouted onessnout is ½ or less than its bodyEat Acorns fallen on ground
5 Life cycle of WeevilLegless, grub-like acorn weevil larvae hatch from eggs a few days after they are laid.Go through five growth stages, or instars.a few weeks, larvae chew their way out of the acorn, burrow into the soil to pupateeventually emerge as adults in 1 or more years.
6 Life Cycle of Acorn Moth The grayish female acorn moths lay eggs in damaged acornssometimes from the holes of acorn weevil larvae.It's easy to distinguish the acorn moth larva from acorn weevil larvae.The acorn moth larva has three pairs of legs near the head & is generally longer than the legless, fat larvae of acorn weevils.Acorn moth Larva feed on acorns & on the fungi that often grow in damaged acorns.They usually pupate inside the acorns
8 Life Cycle of Filbertworm The filbertwormis a moth whose larvae closely resemble the acorn moth, is also often found in acoms.Acorn moth attacks acorns on the groundthe filbertworm attacks developing acorns on the trees.
9 Gall WaspsAdult females lay their eggs in female flowers of oaks in the springcauses galls-abnormal growths of plant tissue,Gall wasp larvae live in and feed on the plant tissue inside the galls.External galls drop off the acorns in the autumn.
10 Hypothesis I think, ____ out of 3 acorns will be infested because________________________________Remember there is no right or wrong in science, just educated guesses based on knowledge
12 LAB Procedure Find 3 Acorns outside Draw a picture of your 3 acorns Measure & record the 3 acorns’Diameter-width around acorn (string & ruler)Weight-in gramsCrack open acorn and search the “meat”Record if it is “Infested” or “Not Infested”If infested, record if weevil larva or caterpillars larva
13 Data (#s) Acorn Drawing Diameter in mm Weight in grams Infected/Not Infected
15 Conclusion Was your hypothesis supported of rejected? What are some sources of possible error?If we were to repeat the experiment, name 1 thing you would do differentlyWhat is something new you learned?
16 New QuestionsCome up with 3 new questions on the Acorn Weevil Lab