INSECT PESTS 



303 



LINDEN 

 Canker Worm : See Apple. 

 White-marked Tussock Moth: See 



Apple and Horse Chestnut. 



Linden Borer: White larvae tunnel 

 in wood at base of tree. Dig out borer or 

 inject carbon disulphide. 



LOCUST 

 Locust Borer: Larvae tunnel in solid 

 wood of trunk. Inject carbon disulphide 

 into the burrows and close the entrance. 



MAPLE 



White -marked 

 Tussock Moth: See 



Horse Chestnut. 



Other Tussock 

 Moths: See Apple. 



Canker- worms: 



See Apple. 



Maple Borer : Larvae 

 make spiral tunnels 

 just under the bark of 

 trunk or larger branch- 

 es. Examine the trees 

 in September; the bur- 

 rows may be located by 

 the sawdust thrown out. 

 Inject carbon disulphide 

 and close the entrance. 



Woolly Maple 

 Leaf Scale: 



White cottony 

 masses of wax con- 

 t a i n i n g females 

 and eggs occur on 

 the under side of 

 the leaves of sugar 

 maples in Mid- 

 summer; the in- 

 sects suck the sap 

 and cause the 

 leaves to fall pre- 

 maturely. Males 

 and larvae are 

 found in the crev- 

 ices of the bark 

 where the latter pass the Winter in white 

 cases. Spray dormant trees with nicotine 

 solution and soap. Burn infested leaves 

 as they drop. 



Cottony Maple Scale: On red and 

 silver maples, large, oval, brown scales 

 pass the Winter on the bark of the branches 

 and in Summer develop conspicuous cotton- 

 like tufts of white wax nearly half an inch 

 in length. Spray with miscible oils. 



Terrapin Scale: Small, reddish brown 

 oval scales occur on small twigs of red and 

 silver maples, sometimes killing them. 

 Spray with kerosene emulsion. 



Woolly Maple Scale 



Oyster-shell Scale: See Apple. 



Maple Aphids: Green aphids are com- 

 mon on under surface of leaves of Norway 

 and Sycamore Maples in June. Spray with 

 nicotine solution or kerosene emulsion. 



MARGUERITE 

 Marguerite Fly or Leaf Miner: A 



maggot tunnels between upper and lower 

 surface layers of the leaves. Spray with 

 nicotine solution every ten or twelve days. 



MELON 



Striped Cucumber Beetle: See Cu- 

 cumber. 



Melon Aphid: Sucks the sap from the 

 under side of the leaves, curling them and 

 causing much damage if abundant. Under- 

 spray the leaves with nicotine solution. 



MILLET 

 Fall Army Worm : See Grass. 



NASTURTIUM 

 Aphid: Brown aphids cluster on stems 

 and leaves, sucking the sap. Spray with 

 nicotine solution. 



OAK 

 Canker Worm : See Apple. 

 Brown-tail Moth: See Pear. 

 Orange Striped Oak-worm: Black 

 and orange striped caterpillars feed upon 

 the leaves late in the season. Spray with 

 lead arsenate. 



OATS 

 Army Worm: See Grass. 



ONION 

 Maggot: Infests the bulb of the young 

 and growing plant. Practice crop rotation. 



Thr i p s or 

 White Blast: 



Very small insects 

 feed upon the sur- 

 face of the leaves, 

 causing a whitish 

 appearance. Burn 

 all tops and re- 

 fuse; burn over 

 the grass land 

 around the field to 

 kill over-wintering 

 insects. Spray 

 with nicotine sol- 

 ution. 



Thripsor While Blast 



