. Bulletin. Agriculture. THE LEAD-CABLE BOEER IN CALIFORNIA. 19 in a suitable pore at the side of the gallery and deposits an egg from 1 to 2^ millimeters into the pore from the gallery. (Fig. 14.) Only a single egg is deposited in each pore. Apparently the pores are selected with considerable care, for oftentiiiies tlie gallery runs for S^MI , , 5 S 5 i! , 5 > J 53 ⢠V ⢠* a ,* ⢠⢠â¢â¢ ⢠⢠*. * ^ â¢â¢ a .* ^. . ⢠' ⢠T ⢠⢠â '.'. 'y. ^^ P , . ⢠'. â ,'' ⢠B ' . i s » â¢â » _ c £:xpi^,v/!r/o/v of c///?ffT C- A^OTH£/? BEETLE -⢠BGGS A - ENTP/INCE BURROM B - EGG G/ILLERV Fig
. Bulletin. Agriculture. THE LEAD-CABLE BOEER IN CALIFORNIA. 19 in a suitable pore at the side of the gallery and deposits an egg from 1 to 2^ millimeters into the pore from the gallery. (Fig. 14.) Only a single egg is deposited in each pore. Apparently the pores are selected with considerable care, for oftentiiiies tlie gallery runs for S^MI , , 5 S 5 i! , 5 > J 53 ⢠V ⢠* a ,* ⢠⢠â¢â¢ ⢠⢠*. * ^ â¢â¢ a .* ^. . ⢠' ⢠T ⢠⢠â '.'. 'y. ^^ P , . ⢠'. â ,'' ⢠B ' . i s » â¢â » _ c £:xpi^,v/!r/o/v of c///?ffT C- A^OTH£/? BEETLE -⢠BGGS A - ENTP/INCE BURROM B - EGG G/ILLERV Fig. 13.âDiagram of section of oak wood with which one pair of adults of tlie Cali- fornia lead-cable borer were placed, showing resulting infestation. May 19, 1920, 5 p. m. Pair of adults placed with section of oak. May 20, 1920, 10 a. m. Female started entrance gallery. Male assists. May 20, 1920, p. m. Male taken short distance away several times. Always returned. Pair mate. May 21, 1920, 12 m. Female about twice its lengtlr in wood. Male removed. May 22 to June 21, 1920. Pernale still boring. Section of wood cut up and examined thoroughly. Female at . terminus of galleiT. weak. Gallery 115 millimeters long. Larvae and eggs found as indicated. (Distances in millimeters.) some distance between places where eggs are laid. The indications also are that in going back and forth to throw out the borings from the entrance the female may stop at any point along the way and lay an egg in the nearest suitable pore: at least the variation in Fig. of California lead-cable borer in pore of wood. Enlarged about 21 times. the sizes of the larvse and the length of their mines indicate this. (See diagram, Fig. 13.) She must also back down and lay, because eggs are found so close to the tenninus of the gallery that anj^ other method of oviposition seems Please note that these images are extracted from scanned page images that
Size: 2493px × 1002px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectagriculture, bookyear
