33 



fields is recognised as an important factor in preventing froghopper 

 attacks, while the green muscardine fungus [Metarrkizium anisopliae] 

 is very useful in keeping the pest in check. Diatraea saccharalis 

 (sugar-cane moth-borer) seriously damaged maize in certain localities. 

 Suitable control measures, including the protection of an insect 

 parasite of the eggs of D. saccharalis, were carried out. Thermesia 

 gemmatalis (woolly pyrol moth) was found in the larval stage destroying 

 the foliage of horse beans {Canavalia ensiformis), but the attacks were 

 of short duration. A Scol}i:id, probably Xylehorus sp., was observed 

 boring in dead cacao twigs, but had probably begun its attack 

 after the tvdgs, were dead. Diaprepes abbreviatus (root borer) in the 

 adult stage has damaged Hme trees by eating the leaves ; these weevils 

 had probably migrated from sugar-cane among which the limes grew, 

 after completing their development in sugar-cane roots. Collecting 

 the weevils, which fall to the ground when the trees are shaken, is 

 being tried as a means of reducing their numbers. The snow scale 

 [Chionaspis citri] and purple scale [Lepidosaphes beckii] have also 

 injured limes ; at one station insecticides have kept these pests under 

 control ; at another, natural control by the fungus Cephahsporiiim. 

 lecanii has proved sufficient. This fungus is now distributed throughout 

 the island and, where climatic conditions are favourable, is exercising 

 a very noticeable measure of control over the shield scale [Coccus 

 nmngiferae] on mangoes and the green scale [Coccus viridis] on limes. 

 Aspidiotus destructor (Bourbon scale) has been very prevalent on 

 coconut leaves ; cutting and burning badly infested leaves and 

 spraying those left on the trees have given good results. Pseudo- 

 coccus sp. (mealy bug) is not at present a serious pest, but steps should 

 be taken to control it before it becomes more abundant. 



Plant Legislation in Grenada. — Eept. Agric. Dept. Grenada, 1916-1917 ; 

 Barbados, 1917, pp. 29-30. 



This paper reviews the legislation passed during the years 1905-15 

 as precautionary measures against the introduction of plant pests and 

 diseases into the island. 



MuNRO (R. W.). The Cultivation of Liberian Coffee.— ^^nc. Bull. Fed. 

 Malay States, Kuala Lumpur, v, no. 11-12, August-September 

 1917, pp. 431-438. 



In discussing the possibility of reviving the cultivation of Liberian 

 cofiee, the author remarks that this crop has been out of favour for 

 so long that it is not possible to conjecture what enemies are awaiting 

 its reappearance in the event of its again being cultivated. In 

 embarking upon such an enterjDrise growers should work on more 

 scientific lines than the early colfee planters were able to do, and, as 

 a prehminary, clean-clearing of the sub-soil timber should receive the 

 consideration it deserves. Undoubtedly the bee hawk-moth [Cephonodes 

 hylas, L.] would again appear as a pest of the cofiee, and as a 

 precautionary measure against its spread it is suggested that no large 

 areas be planted without dividing belts. 



(C433) o 



