. Agricultural news. Agriculture -- West Indies; Plant diseases -- West Indies. 122 THE AGRICULTURAL XIAYS. April in 1915. INSECT NOTES. Tins ing grubs complei in-. adults. bOIL-INHABITING GRUBS. is the season of the year when certain soil-inhabit which attack some of our West Indian crops tre their larval growth andare about to emergi is. Diaprepi s abbreviatus. These insects are of two general kinds: the root borers, Diaprepes abbreviatus, Exophthalmus esuriens, and perhaps other closely related species, and the hard back group including Pkyialus smithi, several species of Lachnosterna and C
. Agricultural news. Agriculture -- West Indies; Plant diseases -- West Indies. 122 THE AGRICULTURAL XIAYS. April in 1915. INSECT NOTES. Tins ing grubs complei in-. adults. bOIL-INHABITING GRUBS. is the season of the year when certain soil-inhabit which attack some of our West Indian crops tre their larval growth andare about to emergi is. Diaprepi s abbreviatus. These insects are of two general kinds: the root borers, Diaprepes abbreviatus, Exophthalmus esuriens, and perhaps other closely related species, and the hard back group including Pkyialus smithi, several species of Lachnosterna and Cyclocephala. Readers ol the Agricultural Keivs will remember that early last year (April 1911) the Leeward Islands runt bona ap- peared iii great numbers in one district in St. Kitts. The adult insects were found in a cotton field in such abundance that some lo,000 were reported to be captured in a short time. In an adjoining field, ripening cane plants were obviously suffering Fn from some disease or pest, and examination revealed the pres- ence of enormous numbers of the grubs of Exophthalmus eniriens, attacking the underground portion of the canes. This insect became abundant in lime trees at Montserrat about the same time, and at Antigua on limes about a month later. The injury caused by the adult beetle is not \ei\ severe. The root injury caused by the grubs may be con- siderable in the ease of limes i in sugai cane. Diaprepes abbreviatus, which is the root borer of sugar-cane in Barbados, occurs in several of the West Indian islands where it may be a pest of sugar-cane, limes or cacao. Of the hard back grubs which are known to be or are believed to be injurious to growing plants, it is lik"ly that in each island one or more species will be found. In St. Kitts, the small brown hard back, Lachnosterna patruelis, is abundant in the cane fields of certain districts. In Antigua, Lachnosterna sp., a slightly larger brown hardback, is known as a pest of Indian com and young
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