531 



worm (Mineola vaccinii) becomes soft and opens several days before 

 the emergence of the adult. The determination of this condition makes 

 it possible to institute control measures by flooding the land at frequent 

 intervals for several weeks in June. Studies were made on a leaf-miner 

 of the cranberry. The method of control of the onion maggot 

 [Hylemyia antiqua) by means of sweetened sodium arsenite spray was 

 tested. A period of 10-14 days elapses between the emergence of the 

 adult and egg-laying, and it was possible to kill many flies during this 

 time. Phthorimaea operculella (tobacco split worm) was found in some 

 localities. Experiments were made to determine the value of lantern 

 traps in the control of Laclino sterna spp. Many thousands of beetles 

 were captured in four localities, and further observations will be made 

 to record any appreciable decrease in the number of larvae. 

 Grasshoppers appeared in large numbers in several localities. The 

 cottony maple scale {Pulvinaria innumerahilis) suddenly became very 

 abundant, destroying many shade maple trees. Reports were 

 received early in the summer of the appearance of the army worm 

 (Cirphis unipunda) on the southern border of the State. Poisoned 

 bran mash was at once used, thus checking any serious injury. 

 A large number of aphids on many kinds of trees, shrubs and plaiits 

 were in evidence during the summer. Considerable damage from 

 cucumber beetles occurred in several sections. Additional localities 

 infested with San Jose scale {Aspidiotus perniciosus) were discovered. 



Franklin (H. J.), Report of Cranberry Sub-Station for 1914. — 



Massachusetts Agric. Expt. Sta., Amherst, Bull. 160, April 1915, 

 pp. 91-117, 6 tables. [Received 22nd July 1915.] 



Malacosoma disstria (forest tent caterpillar) was abundant during 

 May and June throughout the cranberry section ; cranberry plants, 

 however, were not damaged. A severe infestation of Cirphis 

 {Heliophila) unipunda (army worm) was reported from Cape Cod.. 

 Lymantria (Porthetria) dispar (gipsy moth) is becoming more abmidant 

 yearly on the uplands around the bogs ; the following points ia 

 connection with this insect need to be determined : (1) Whether, in 

 cases of serious bog infestation, the trouble arises from eggs laid on 

 the bog in the previous year or from small larvae blown on to it early 

 in the season ; (2) whether the eggs can survive winter flooding if 

 the water is retained until late in May ; and (3) what is the best time 

 to let the water return in order to destroy this insect. A bog should 

 probably be flooded as soon as possible after the hatching of the eggs. 

 The insect net recommended for discovering the first stages of the 

 false army worm would be useful for detecting small gipsy moth 

 larvae early in May. When an infested bog is flooded the larvae 

 usually float ashore ahve in large numbers and must be killed by 

 burning or spraying with crude oil or kerosene. Attempts to destroy 

 Anthonomus suturalis (cranberry weevil) by flooding were unsuccessful. 

 Spraying with arsenicals at the time when the plants were in bud or 

 after the blossoms had opened lessened the damage to some extent. 

 The Geometrid, Epelis truncataria var. faxonii (span worm), did 

 considerable damage in one locahty. Larvae of this insect collected 

 on 23rd July 1913, pupated by 8th August ; from 25-30 per cent, 

 were parasitised by Campoplex sp. On 28th May 1914, living pupae 

 (C188) c 2 



