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GARDEN GUIDE 



Insect Pests — Arranged by Host Plants 



Canker Worms 



APPLE 

 Leaf -Grumpier: Case Bearers: Bud- 

 Moths: Several kinds pass the Winter as 

 small caterpillars and feed upon the un- 

 folding leaves, occasionally doing consider- 

 able damage. Spray with lead arsenate as 

 soon as trees begin to look green; repeat a 

 week later. 



Canker Worms: 

 Small looping cater- 

 pillars feed upon the 

 leaves during May, 

 and when disturbed 

 spin down on silken 

 threads. Spray fo- 

 liage with lead ar- 

 senate before blos- 

 som buds open, and 

 again soon after the 

 petals fall. In un- 

 sprayed orchards 

 sticky bands of tree- 

 tanglefoot should be 

 placed around the 

 trees late in October, 

 and kept sticky un- 

 til January ist, and 

 again kept sticky from April ist to June ist. 



Tent Cater- 

 pillar : Forms 

 nests at the forks 

 of the branches 

 during the 

 month of May 

 and the cater- 

 pillars devour 

 the leaves. 

 Spray with lead 

 arsenate just 

 before blossoms 

 open and again 

 after they fall. 

 Egg-masses may 

 be clipped off 

 and burned dur- 

 Tent Caterpillar i"S Winter, and 



the nests may 

 be removed with a cone-shaped brush. 



Codl ing 

 Moth or Apple 

 Worm : Larva 

 burrows inside 

 the fruit, par- 

 ticularly around 

 the core. Spray 

 with lead arsen- 

 ate soon after 

 blossoms fall 

 and repeat three 

 to four weeks 

 later. Both fo- 

 liage and fruit 

 should be kept 

 well covered 

 with spray 

 until fruit is 

 nearly grown. 



Gipsy Molh 



Codling Moth or Apple 

 Worm 



Lesser Apple Worm: Feeds on the 

 surface of fruit that is nearly mature, often 

 injuring it in storage. Spray as for Codling 

 Moth. 



Gipsy Moth: 

 Occurs in the 

 United States 

 only in South- 

 eastern New 

 England. 

 Brownish, hairy 

 caterpillars de- 

 foliate the trees 

 in May and 

 June. Spray 

 foliage with lead 

 arsenate, using 

 5 to 10 pounds 

 of the paste in 

 50 gallons of 

 water. From 

 August to May, 

 seek for egg 

 clusters and 

 destroy them in 

 situ by soaking 

 with creosote. 

 Band trees with 

 tree tanglefoot. 

 Leaf-roller: Green Fruit Worms: 

 Palmer Worm: Caterpillars feed upon 

 leaves and partly grown fruit, often seri- 

 ously injuring it. Spray with lead arsenate 

 as for codling moth. 



Tussock Moths: Tufted caterpillars of 

 several species feed upon the leaves the 

 latter half of Summer. The white-marked 

 tussock moth and the hickory tussock moth 

 are usually the most abundant and there- 

 fore the chief offenders. Spray with lead 

 arsenate as for codling moth. 



Red-humped Caterpillar: Yellow- 

 necked Caterpillar: Feed in clusters on 

 ends of branches, often stripping young trees 

 in August and September. Gather by hand 

 and destroy, or spray the foliage with lead 

 arsenate. 



Fall Web-worm: Brown-tail Moth: 

 See Pear. 



Curculios: Grubs of both Apple and 

 Plum curculios infest the fruit, making it 

 gnarled and ill-shaped. Spray twice after 

 blossoms fall, and remove infested fruit in 

 thinning. 



Apple Maggot or Railroad Worm: 

 Small, legless white maggots burrow in the 

 flesh of the ripening fruit of sweet and sub- 

 acid varieties, especially those ripening 

 early in the season. Will greatly injure 

 fruit in storage unless kept at a low tempera- 

 ture. Keep trees sprayed with lead arsenate 

 as for codling moth. Destroy all infested 

 fruit. 



