Fungus Paecilomyces lilacinus Paecilomyces-lilacinus

Paecilomyces lilacinus General Description

Here in the mountains of Costa Rica, there are whiteflys. Yes, “I have whiteflys!!” So I make the following statement with field experience authority. Paecilomyces lilacinus can be used against the nymphal stages of whiteflys, applied in combination with two other fungus, Isaria fumosorosea and Lecanicillium spp. The latter two of which are effective against the adult whiteflys while the Pae works on the larvae. Applying these three microbes together will bring down significantly the population of larvae and adults both. It’s a quite interesting combination that can be sprayed over the infested plants in one application. Fungus work better in heterogeneous groups than alone.

Paecilomyces lilacinus Mode of Action

The fungus Paecilomyces lilacinus in sufficient concentrations over 107 u.f.c/ml, produce hyphae over eggs and larvae on anthropoids of the geneses Meloidogyne, Pratylenchus and Radopholus producing deformities in the embryo.The hyphae grow over the egg, while the tips swell and create deformities. A penetration peg grows from the bottom of the hyphae (appressorium) into the egg. The eggs swell and buckle. As penetration continues and the eggs split while the hyphae fill the egg completely. The fungus then emerge to the egg surface producing first vegetative growth. After 5 days most of the eggs are infected. The young born infected soon die.

Paecilomyces lilacinus Mode of Application

Shake the bottles well before using. Dilute the OST liquids containing the fungus 4 to 1 with de-chlorinated water. Pass the liquid threw a strainer before placing it in your sprayer. Generously coat the bottom leaves  with the liquid solution. You will see most of the nymphs and adults feeding on the bottom of the leaves. But it is a good idea to have a well established fungal culture on the entire Phylospher. By this I mean spray the bottom of the leaves and the stems as well.

De-chlorinating water is simply water that has been sitting over night with the lid of the bucket open to the air. Chlorine, over time, separates from the water and bubbles up and out. You can see that by filling a glass container up with tap water and letting it sit. Soon you will see the bubbles on the edges of the glass. That is chlorine gas. For other ways to de-cloronate, such as applying vitamin C, refer to our post De-chlorinate Water When Using Microbes.

In rare cases, Paecilomyces lilacinus is on record as cause opportunistic systemic fungal diseases in humans. It has been implicate in eye, lung and skin infections. Personally, I have never known anyone that has had a problem in horticultural applications but be careful when handling the product.