155 



Scroll (E. E.). Pink BoUworm Division. — 11th Ann. Rept. Commiss. 

 Agric. Texas, Austin, 1st September 1918, pp. 63-82. [Received 

 26th January 1921.] 



The campaign against Platyedra [Pectinophora) gossvpiella, Saund., 

 in Texas, for the year ending September 1918, is described \R.A.E., 

 A, vi, 544 ; vii, 180]. 



Scroll (E. E.). Report o£ the Chief Entomologist of the State Depart- 

 ment of Agriculture to the State Farmers' Institute convening at 

 Austin, Texas, 6th, 7th, 8th August, 1919. — Texas Dept. Agric, 

 Austin, Bull. 67, July-August 1919, pp. 15-21. [Received 

 26th January 1921.] 



Insects that required special attention in Texas during 1919 included 

 bean thrips [Heliothrips fasciatus], mebn aphis [Aphis gossypii], 

 and spring army worms that were destroying wheat and oats. Grass- 

 hoppers, pecan insects, fruit and shade tree pests and apple insects 

 were also troublesome. 



The control of pink bollworm [Platyedra gossypiella] is progressing 

 satisfactorily. The situation in various localities is discussed. Essen- 

 tial measures are the destruction of self-sown cotton, the enforcement 

 of regulated and non-cotton zones, the tracing of consignments of 

 cotton that may have been infested or become contaminated, and 

 scouting work. The organisation for these purposes is described. 



LuNDBLAD (0.). Apple- och Paronbladloppoma. [The Apple and 

 Pear Leaf-suckers.] — Medd. Centralanst. Forsoksvdsendet pa 

 Jordbruksomrddet, no. 209, Ent. Avdelingen, no. 37, Linkoping, 

 1920, 20 pp., 18 figs. [With an extract in German.] 



The apple leaf -sucker, Psylla mali, Schmidb., is common in the 

 southern half of Sweden, chiefly on apple, but also on Sorbus aucu- 

 paria, and, according to Renter, on Corylus, though this is doubtful. 

 The eggs hibernate on the branches. In spring the larvae hatch 

 when the shoots open. In Central Sweden maturity is reached by 

 mid-June. The Psyllid remains on the apple until autumn, mating 

 occurring in the late summer and autumn. P. mali often causes 

 severe injuiy. Infested apple trees are easily recognisable by the 

 abundant honey-dew. In Sweden a 10 per cent, carbolineum emulsion 

 is sprayed when the shoots open in spring, with the object of killing 

 the eggs. Great care must be taken to spray at the right time, or the 

 aim will not be attained, and even great injury may be done to the 

 trees. Nicotine sulphate is employed against the young larvae. 



The pear leaf-suckers are less harmful. Very little is known about 

 them. P. pyrisuga, Forst., does not appear to be rare, but is abundant 

 only exceptionally, and important injury seldom occurs. P. pyrisuga 

 hibernates in the adult stage. The eggs are laid in spring, usually 

 on the young leaves. The larvae at first feed on the green portions 

 of the pear tree ; later on they attack the bark of the previous year's 

 shoots. Before the last moult the larvae again return to the lea\'es. 

 These habits are undoubtedly secondary, and the lar\-ae must origi- 

 nally have lived on the green portions only. The infested leaves curl 

 and crinkle. Nicotine sulphate is recommended against this species, 

 the young larvae being sprayed once or twice in early summer. 



