A short post to share with you a special situation that we have been going through at the farm for the last week or so. White butterflies that usually fly past on a migration somewhere they only know, have arrived. Unlike previous years, they have decided to stay.

Ascia monuste, the great southern white or pirpinto in Argentina is the only species in the genus Ascia. It is found from the United States to Argentina where they migrate yearly but only in one direction and without return. Despite their English name, they are rather small with a wingspan of 63 to 86 mm.

Pirpinto feeding on a Lantana flower.

Their main aim is to find plants of the Brassicaceae family (Cabbage, Kale, etc.) to lay their eggs for their larvae to feed on them. However, as there are several sub-species, they can also feed on other plants such as Lettuce, Alfalfa, Cotton, Rice, Potato, Chicory, Cassava, Passion Fruit, Corn, Mustard, Radish, Rocket and Soybeans to name a few.

The larvae will develop in 4 to 5 days and the adults will be appearing a fortnight later and they will feed on the nectar of plants such as saltwort, lantana and verbena while laying their eggs on some of the target species mentioned above.

We were enjoying their visit as they staged a great show that reminds us that Nature is able to create amazing sights.

Unfortunately, Mabel noted that the winged visitors had discovered her treasured rocket plants and they were busy laying their eggs on them so our focus has recently and urgently moved from contemplation to biological control to save our veggies!

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