APPLE INSECTS 47 



hoe dirt back; do this in late spring when tree is in 

 leaf. 



Dark Redbug ^^ (Hctcrocordylus malimis) 



Light Redbug {Lygidca mendax) 



Order — Hemiptera 



There are two species of redbiig-s, the dark red- 

 bug and the light redbug, that injure the fruit by 

 puncturing it, which causes it to fall off or become 

 knotty; the life histories of both are quite similar; 

 the eggs of both are laid during late June or early 

 July in the bark of smaller branches. They hatch 

 the next spring, those of the dark redbug soon after 

 the leaves of the fruit buds open and those of the 

 light redbug from 7 to 10 days later. The nymphs 

 pass through five stages and become mature in 

 about one month. There is one generation a year. 



Control — Spray for the nymphs with nicotine 

 sulphate, i pint to 100 gallons of water; the effi- 

 ciency will be increased by adding 4 pounds of soap 

 to every 100 gallons; spray just before blossoms 

 open and after they fall, especially in case of the 

 light redbug. The tobacco may be added to lime- 

 sulphur and arsenate of lead. The calyx spray of 

 arsenate of lead, lime-sulphur and nicotine has ap- 

 parently, in some instances, controlled the light red- 

 bug. 



Apple-seed chalcis -^ {Synfoniaspis drupanmi) 

 Order — Hymenoptera 



The adult wasp-like fly punctures the fruit to 

 deposit her eggs in the seed and this causes the fruit 

 to become knotty; the ego; is deposited inside of an 

 apple seed in June; it hatches and the grub feeds 

 on the soft kernel until September; it then hiber- 



1^ Crosby — Cornell Univ. Expt. Stat., Bull. 291. 

 §0 Crosby— Cornell Univ, Expt. Stat., Bull. 265. 



