Appearance: Leptomastidea abnormis is a small parasitic wasp, about 0.75-1.5 mm. The body of both the females and the males is yellow / brown / gray in color. Females often have a light-colored band across their abdomen. The wings have three black belts that are strikingly upright. Males are generally smaller than the females and have hairy antennae. Parasitized mealybugs swell to orange yellow colored pupae, which are often difficult to spot because they are very small. When the wasp has hatched, there is a round hole at the end of the pupa.
Mode of action: A female lays her eggs especially in the second and third instar of the mealybug. One egg per mealybug is laid. The wasp larvae eats the mealybugs from the inside. The mealybug turns into a darker orange cocoon / mummy that is often difficult to see in the crop. The cocoon finally drops from the plant. A female lays 200-300 eggs during her entire lifetime of around 30 days (at 22oc). They develop in three weeks to new parasitic wasps.
Application: The parasitoid is being used in greenhouses and indoor plantings against citrus mealybug (Planococcus citri). Consider repeated introductions. Leptomastidea has relatively few demands towards temperature, humidity and day length and can already be deployed well in the spring. Experience has shown that it takes a longer period of time before the effect of the product is visible. Leptomastidea can settle itself relatively easily in a crop. The product is sensitive to various chemical crop protection products. Ask for advice on introduction strategy.
In a situation with severe degradation or deterioration in hot spots we recommend a combination with larvae of the predatory beetle Cryptolaemus montrouzieri.
effect of L. abnormis:
- small parasitic stages of citrus mealybug
- lays one egg per mealybug
- larva of the wasp eats the mealybug from the inside
- effect not directly visible, takes min. 4 weeks
- settles easily
Product Leptomastidea abnormis:
transparent jar of 40ml with 25 100 adult wasps.
a maximum of 2 days at 10-15 ° C
optimum bij 25°C, effective between 15 and 40°C