10 



numbers of its Scoliid parasite, Tiphia parallela ; efforts are being 

 made to propagate the latter in various parts of the island. Grubs 

 of Diaprepes abbreviatus have been found 3 feet below the surface in 

 moist clay. The grubs leave the cane roots, when they begin to dry 

 after the cane is cut, in search of moisture. Unless therefore, as has 

 been insisted on before, the roots are removed as soon as the cane is 

 cut, the grubs will not be removed with them. It is now clearly proved 

 that the life of the grub may extend to 300 days and rotation is 

 suggested, but as the grubs also attack cotton and sweet potato, the 

 question of a suitable crop requires further consideration. 



In the field the pupal stage is very short. The collection of beetles 

 and egg-masses by hand is being steadily carried on, and though 

 rather costly, the results obtained justify the expense; the price is 

 arranged according to prevalence, so that a reasonable wage may be 

 earned. No effective parasites have been discovered. A few examples 

 of Exophthalmus esuriens have been found feeding on Agave ; this is 

 the first record for Barbados. Other pests of sugar-cane, Diatraea 

 saccharalis, Sphenophorus sericeus, Pseudococcus calceolariae and 

 P. sacchari, were not more numerous than usual. Termites did great 

 damage on one estate. Red spiders attacked sweet potatoes and 

 Laphygma fiugiperda was the only serious pest of maize ; corn meal 

 poisoned with Paris green dropped into the middle of the rolled up 

 leaves of young plants was a useful remedy. A species of Mytilaspis 

 was collected from cassava. Lime-sulphur paint has been used with 

 marked success against Cliionaspis citri ; the formula is as follows : 

 Sulphur 2 lb., unslaked lime 1 lb., water 2 gallons, boiled for an hour 

 and a half ; 3 lb. more lime is then added and the mixture boiled again 

 for half an hour, and made up to 2 gallons ; sufficient flour or fine 

 clay must be added to make it of the consistency of thin paint ; it is 

 applied with a brush. This paint not only kills the scales, but has a 

 very cleansing effect on the trees. 



Stratford (G.). Tests of Spraying-Compounds : Lime-Sulphur. — Jl. 



Agric, Wellington, N.Z., xi, no. 3, 20th September 1915, pp. 243- 



247. [Received 15th November 1915.] 

 This is a report on the tests made in the Nelson district and continues- 

 a previous article on the testing of lime-sulphur [see this Review, 

 Ser. A, iii, p. 736]. The results are shown in a series of tables. Strengths 

 of 1 to 60, 1 to 80 and 1 to 100 were used ; one of the brands tested 

 was 33° Be. and another 23° Be. While some apple trees will stand a 

 much stronger spray than others, tender varieties such as Jonathan 

 and Cox's Orange Pippin are very susceptible to injury. It is therefore 

 better to take the strength of 1 to 80 as a standard and even sprayings 

 of 1 to 100 have given excellent results. In the course of spraying 

 pear trees, it was noticed that while the trees were quite clean and 

 healthy after two applications, the third one scorched the foliage 

 considerably. 



Richards (P. B). Methods and Materials for the Control of Insect 



Pests. Part VII. — Agric. Bidl., Fed. Malay States, Kuala Lumpur, 



iii, no. 11, August 1915, pp. 429-436. [Received 19th November 



1915.] 



This paper deals with resin compounds, kerosene emulsions and 



sanitary fluids, and their use as contact poisons. For the preparation 



