Asian Locust

Latin name: Locusta migratoria

Russian name: Asian Migratory Locust

Pest Type: Multi-Pest

Row: Orthoptera – Orthoptera

In Russia, it is represented by two subspecies: L. Migratoriamigratoria L. and L. migratoriarossicaUv. etZd. The second subspecies is called the Central Russian locust. The main reservations of the first subspecies are located on the riverbed of the Danube, Dnieper, Dniester, Prut. One of the centers of the Central Russian locust is known on the territory of the Danube. It damages all fields, garden, vegetable, melon, garden, and forest crops. It harms grasses on hayfields and pastures, in thickets of reeds. The adults are 29–59 mm in size, brown or greenish in color, the anterior back with a sharp longitudinal keel in the middle; elytra long, with brown spots; hind wings transparent with a faint yellowish-greenish tinge in the main part.

Eggs measuring 6 – 8 mm, oblong, rounded at the ends. The larva is imago-like. On the other hand, the rudiments of the wings develop in the larva; their sizes are characteristic for each age. With each molt, the number of antennae increases.

Central Russian locust lays egg capsules mainly on spring stubble and deposits. In the largest number of eggs, capsules are found on the dry islands of reeds. Their numbers usually increase in dry years with low floods. The eggs are laid in a not too hard ground in the place where the locust herd was at the time of complete maturation of the ovaries.

The embryonic development of the herd phase of the migratory locust begins in the fall and ends in the spring of next year. Single-phase eggs under favorable conditions develop without diapause. Embryonic development in the south ends in May, depending on temperature and floods.

Larvae regenerate in the warm years in the third decade of May-early June, and in the cold in the second decade of June. Fledging is the southern reserves that begins in early July, and the laying of eggs by females begins in mid-August and lasts until October.

One female lays, as a rule, two egg capsules. Sometimes, especially in wet years, locusts are severely affected by the fungal disease caused by EmpusagryliiFres. Significant locust epizootics were recorded in Russia in 1933 when during the growing season there was a lot of rainfall and fogs were often observed.

About the author

Leave a Reply

Your email address will not be published. Required fields are marked *

Solve : *
11 × 13 =