459 



Scouting and creosoting egg-clusters, spraying badly-infested areas 

 and banding have also been continued. Its enemies that have been 

 introduced into Connecticut include the Carabid beetle, Calosoma 

 sycophanta, L., the Tachinid, Compsilura concinnata, Meig., and the 

 Hymenoptera, Apanteles lacteicolor, Vier., and Anastatus bifasciatus, 

 Boyer, These are not yet sufficiently numerous to obviate the necessity 

 for other measures. Some pupae collected were infested with a 

 fungus, Isaria farinosa. A table summarises the work of parasite 

 introduction. Details of gipsy moth work in various towns are given, 

 the statistics of various localities being included in a table. 



Britton (W. E.) & Zappe (M. P.). Experiments in Spraying Apple 

 Orchards to control Aphids and False Red-Bug. — 17th Rept. 

 Connecticut State Entomologist for 1917, Conn. Agric. Expt. Sta., 

 New Haven, Bull. no. 203, 1918, pp. 259-262, 2 plates. 



Lygidea mendax, Rent, (false apple red bug) is prevalent in the 

 south-western coimties, and probably occurs throughout the State, 

 doing considerable damage to apple orchards. Among A-Tphids, Aphis 

 sorhi and A. pomi are chiefly responsible for injury to fruit. Treatment 

 with nicotine sprays gave considerable success, the results being given 

 in tables. The formula employed was 1 pint Blackleaf 40, 2^ lb. 

 powdered lead arsenate, 2 U.S. gals, commercial lime-sulphur and 

 100 U.S. gals, water. Treatments were given on 21st May and 4th 

 June. The red-bug injury on the sprayed trees was found to be 

 ahnost negligible, but Aphids were still present in large numbers. 

 It is hoped to continue the experiments next year, and it is suggested 

 that spraying should be done earher and that the branches should be 

 thinned to let in more light and air. 



LowRY (Q. S.). The Striped Cucumber Beetle : Diabrotica vittata, F. 

 — 17th Rept. Connecticut State Entomologist for 1917, Conn. Agric, 

 Expt. Sta., New Haven, Bull. no. 203, 1918, pp. 262-273, 

 2 plates, 1 fig. 



Diabrotica vittata F. (striped cucumber beetle) has been abundant on 

 cucumbers and squashes and related Cucurbitaceae and has also 

 attacked young peas and beans. The beetles feed from late spring 

 until October ; in 1916 the adults practically destroyed the entire 

 crop by attacking the cotyledons as they appeared above ground. 

 The life-history of the various stages is given. The most important 

 parasite is a Tachinid, Celatoria diabroticae, Schimer. Certain ground 

 beetles and ants feed on the larvae. 



Various methods of control are discussed which have already been 

 reviewed [see this Review, Ser. A, v, pp. 370, 529]. The results of 

 experiments indicate the following as the principal means of control :— 

 Protecting young plants with wire netting or mosquito-net covers ; 

 spraying with lead arsenate alone or in combination ; dusting with 

 lead arsenate, land plaster (gypsum) or air-slaked lime ; spraying with 

 lime- sulphur ; planting an abundance of seed and then thinning ; 

 clean cultivation in the autumn ; planting of trap-crops ; and the 

 use of fertilizers as a stimulant to growth. 



(C504) c2 



