Ce guide identifie les insectes nuisibles nuisibles qui endommagent les cultures de jardin et de plein champ, comme la pyrale de la canne à sucre. Il fournit des conseils pratiques sur la reconnaissance des ravageurs et le contrôle de leur impact, avec des méthodes spécifiques de gestion des infestations dans les milieux agricoles.
1308 x 1910 px | 22,1 x 32,3 cm | 8,7 x 12,7 inches | 150dpi
Informations supplémentaires:
Cette image appartient au domaine public, ce qui signifie que le droit d’auteur a expiré ou que le titulaire du droit d’auteur a renoncé à ses droits. Les frais facturés par Alamy couvrent l’accès à la copie haute résolution de l’image.
Cette image peut avoir des imperfections car il s’agit d’une image historique ou de reportage.
. Injurious insects : how to recognize and control them . Insect pests; Insect pests. 126 PESTS OF GARDEN AND FIELD CROPS the sugar-cane borer. In early summer, the tender unfolding leaves are found riddled, and often the central part destroyed, so that growth is aborted. In midsummer a new generation of borers works in the pith of the lower stalks, making numerous channels, often causing the stalk to break down in strong winds. The first lot of moths are out early in the growing season, and lay eggs on the young leaves. In the fall the larva of the second brood burrows down into the base of the stalk, where it spends the winter. Control measures consist in the removal and destruction of aU stalks left in the field in fall. If the stalks are short, they may be plowed under deeply. Rotation of crops will help in control. The Sugar-cane Borer {Diatrcea saccharalis Fab.) The work of this borer in sugar cane is similar to that of the related species in corn. The larvae destroy the buds or " ej^es " by enterifig the stalk through them, stunting the growth of the young plants, and their burrows so weaken the main stalks that the plants break off in strong winds. In addition the sugar content is seriously lowered. Eggs are laid on the leaves, and the larvse feed for a short time in the upper whorls, but soon enter the cane. Pu- pation takes place within the stalk. There may be several broods annually. Winter is passed as larva or pupa within the cane, and emergence of adults begins early in the spring. Control is difficult. All tops and trash should be spread out to dry, and burned as soon as possible. Infested cane around sheds and refineries should be destroyed. Shoots and suckers from the stubble of early cut cane should be cut off, so as to cause the death of the young borers within that otherwise would hibernate.. Fig. 101. — Adult of the Sugar-cane Borer. Original.. Please note that these images are extracted from scanned page images that may have been di
