471 



Tomato and tobacco are always attacked, but only severely when 



growing near maize. Hungarian millet, Rosa, Calamintha, and Reseda 



luteola can serve as food-plants. Spraying and dusting with lead 



arsenate during 1914, gave a slight increase in yield for the treated 



as compared with the untreated maize. Insect enemies of C. ohsoleta 



include : — Trichogmmma ])raetiosum, parasitic on the egg ; the Cocci- 



nellids, Megilla nuiculata and Hippodamia convergens, and the Antho- 



id bug, Triphleps inmliosus, feeding on the egg ; a beetle larva, 



haps the Tel ephorid, Chmdiognathus marginatus, attacking the larvae ; 



the Reduviid, Nabis {Coriscus) ferus, and Ckrysopa oculata, 



latory on the caterpillars. 



Reed (W. V.). Some of the more important Truck Crop Pests in 

 Georgia. — Georgia State Bd. Entom., Atlanta, Bull. no. 41, March 

 1915, 39 pp., 29 figs. 



Tetranychus himaculatus is injurious to tomatoes, beans, melons, 

 cucumbers, etc. A mixture of lime and sulphur sprayed on to the 

 upper and under surfaces of the leaves is an efficient remedy. Mur- 

 gantia histrionica, the harlequin cabbage bug, attacks the leaves of 

 cabbage, mustard, radish and turnip. Burning all waste material, 

 during winter, will destroy many hibernating adults. Kerosene 

 emulsion can be used against the immature stages. Anasa tristis, 

 the squash bug, hibernates in the adult stage ; the larvae injure plants 

 by sucking the juices and also causing irritation by means of the poison 

 injected. Hand-picking may be resorted to in small areas ; trapping 

 by means of early plants, is also recommended. Spraying with 10 

 per cent, kerosene emulsion or Black Leaf 40 at the rate of 1 part to 

 300 parts of w^ater, kills the nymphs. Cotton, cucumbers and melons 

 are attacked by Aphis gossypii, which congregates on the under surface 

 of the leaf. Eggs laid in the autunm hatch the following spring. 

 Many generations occur during the summer. This aphis suffers 

 severely from parasitic and predaceous enemies. Black Leaf 40, soap 

 solution at the rate of 1 lb. to 3 or 4 gals, w^ater, or kerosene emulsion 

 are effective remedies. A. brassicae, w^hich is most destructive in the 

 autumn, can be controlled in a similar way. Scapteriscus didadylus, 

 the mole cricket, has probably been introduced into the south-eastern 

 part of Georgia from Porto Rico. It feeds on potato, turnip, tomato, 

 sugar-cane, etc. One brood is produced during the year ; the eggs 

 are laid in the earth during April, May and June. The eggs hatch in 

 from 24 to 26 days and from 8 to 12 months elapse before the adult stage 

 is reached. The exposure of the eggs to the sun by ploughing is the 

 best method of destroying them. Poisoned bait has been used with 

 good results. The cutworms, Lycophofia margaritosa {Peridronuv 

 saucia) and Agrotis ypsilon, can be controlled by clean cultivation and 

 the use of poisoned bait. Hellida iindalis, ¥., has been abundant 

 during 1914. The larva feeds at the base of the leaves of turnip and 

 cabbage plants. Spraying with lead arsenate at the rate of 2 lb. to 

 50 gals, water, is effective when the larvae first appear. Delay in 

 spraying renders the operation less successful, owing to the formation 

 of webs over the leaves. Diaphania nitidalis and D. hyalinata are 

 common pests of cucumber, melon and cantaloupes [see this Review, 

 Ser. A, i, p. 219]. Melittia satyriniformis, the squash-vine borer, has 



