INSECT PESTS 



297 



Round-headed Borer 



R o u n d - 

 headed Borer: 

 Flat-headed 

 Borer: Grubs 

 tunnel in the 

 trunk near the 

 ground. Dig 

 out the borers 

 wherever saw- 

 dust appears. 

 Apply a mixture 

 of lime-sulphur 

 and lead ar- 

 senate to the 

 trunks. 



Leaf- blister 

 Mite : See 



Pear. 



Red Spider: 

 Clover Mite : 



. , Injure the 



leaves, especially in dry seasons, by feeding 

 on the surface, causing them to turn yellow 

 or rusty in color. Eggs of clover mite are 

 often abundant on tree trunks through the 

 Winter and are orange red in color; they 

 are killed by the lime-sulphur spray in early 

 Spring. For Summer treatment spray 

 leaves with kerosene emulsion or nicotine 

 solution. 



Apple Red- 

 Bugs: Two 

 species of red leaf- 

 bugs suck the sap, 

 causing the leaves 

 to become dis- 

 torted, and the 

 fruit to be ir- 

 regular with de- 

 pressed spots 

 usually most 

 abundant near 

 blossom end. 

 Spray with nico- 

 tine solution (i 

 pint in 50 gallons 

 water) either sep- 

 arately or in com- 

 bination with lead arsenate, lime-sulphur 

 or Bordeaux mixture. 



Tarnished Plant Bugs: Suck the sap 

 from the fruit, dimples developing from the 

 punctures. Spray with nicotine solution as 

 for Red Bugs. 



Leaf Hoppers : Whitish insects sucking 

 sap from the under side of the leaves, caus- 

 ing a whitish spotting or mottling on upper 

 surface. Spray with nicotine solution as 

 for Red Bugs. 



Woolly Apple Aphids : A white, woolly 

 or cottony mass on bark represents a colony 

 of this aphid, which sucks the sap, forming 

 swellings or galls on the twigs. It clusters 

 in wounds and prevents healing. It also 

 forms galls on the roots, and often the 

 smaller roots decay. Plant only clean or 

 fumigated stock. Apply tobacco dust liber- 

 ally and work into the soil around trees. 



Apple Red-Bugs 



Rosy and Green A phids 



Spray with kerosene emulsion to kill aphids 

 on twigs. 



Rosy and 

 Green Aphids: 



Rosy aphids 

 attack the fruit 

 clusters which 

 fail to develop, 

 and also the 

 leaves, causing 

 them to curl. 

 The green 

 aphids usually 

 attack only the 

 leaves of ter- 

 minal shoots 

 and water 

 sprouts, causing 

 them to curl, 

 thus checking 

 the growth. 

 Spray with 

 nicotine solu- 

 tion as for Red 

 Bugs. 

 Oyster-shell Scale: 

 Scurfy Scale: Both 

 occur on the bark and are 

 elongated or pear-shaped 

 shells, the former about 

 the same color as the 

 bark; the latter, light gray 

 or whitish. The insect 

 under the shell sucks sap 

 from the twigs. Spray 

 with nicotine solution, 

 soap and water, or kero- 

 sene emulsion about the 

 second week in June. 



Oyster-shell San Jose Scale: See 



Scale Peach. Illus. 



ASH 

 Oyster-Shell-Scale: See Apple. 



ASPARAGUS 



As para g u s 

 Beetles: Both 

 adults and larvae 

 of the common 

 asparagus beetle, 

 and the twelve- 

 spotted asparagus 

 beetle feed upon 

 the leaves, often 

 injuring new plan- 

 tations. Cut 

 everything clean 

 during the cutting 

 season; later 

 spray with lead 

 arsenate. New 

 plantations 

 should be sprayed 

 when the beetles 

 Common Asparagus Beetle first appear. 



