. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 8 i;i i i i i 'â -â . i . 3. i>i r\i;i mi m 01 IGBH 01 i ii:r median triangular area, truncate, or family emarginate. Olyp with raised w-like rugosity with corresponding lateral and anterior mesial concavities; anterior margin truncate or obscurely broadly emarginate. Mature bead capsules in pupation chambers \ ary greatly in dimensions, the minimum being hud. Long without mandibles, front mm. I'.\ nun., epistoma nun., pleurostoma mm.; the maximum nun. long without mandibles, front I nu
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 8 i;i i i i i 'â -â . i . 3. i>i r\i;i mi m 01 IGBH 01 i ii:r median triangular area, truncate, or family emarginate. Olyp with raised w-like rugosity with corresponding lateral and anterior mesial concavities; anterior margin truncate or obscurely broadly emarginate. Mature bead capsules in pupation chambers \ ary greatly in dimensions, the minimum being hud. Long without mandibles, front mm. I'.\ nun., epistoma nun., pleurostoma mm.; the maximum nun. long without mandibles, front I nun. by mm., epistoma mm., pleurostoma mm. Tin' larva differs from the larva f Sttona > also found on clover root-., in being relatively smaller and stouter, without long hairs, ami with more evident distinotioD between the tho- racic and abdominal regions. Sitona larvnare always external feeders, II- obscunu larva- al- ways internal feeders. PUPA The pupa (figs. 5 and 6) is truncate fusiform in shape, with the apex of the abdomen squarely truncated on a line between the caudal spines no. of larva or the da- on the ninth abdominal segment. The wing ver root borer Front view, pads extend to near tile him! margin of tin- greatly enlarged r. 1,1 i ,iii sixth, and the elytra] pads to near the hind margin of the fifth abdominal segment. Tne color of the fresh pupa is pearly white to white and shining. SetaB on all parts of pupa are short, fine, inconspicuous. Setal spines ate also snort ami inconspicuous, except the two anterior dorsal spines on the prothorax, which are considerably more prominent than other thoracic spines and setae, and the two very prominent conical, slen- derly pointed, and slightly recurved caudal spines on the ninth abdominal segment. The two frontal setal spines opposite the upper inside margin of the eve mark the vertical limits of carina' which form the out- side margins of crescent-shaped concave areas. There is also a median i
Size: 1137px × 2198px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1900, bookdecade1910, booksubjectagriculture
