Downy mildew cubensis

When this mold attacks Psilocybe cubensis, there are several additional characters worthy of note. Parasitized P. cubensis caps frequently become plane at an early stage. The stem beoomes swollen and hollow, narrowing radically towards the apex. Only in an extremely humid environment does a downy mildew develop over the oap and stem surface. The "Verticillium spots" so oom-monly reported by growers oiAgaricus. a white mushroom, are more aoourately oalled "Vertioillium streaks" on P. cubensis, a mushroom with a brownish cap and a whitish stem. 

Cucumber downy mildew [Pseudoperonospora cubensis) 75-150 (mixtures with famoxadone) 5... 

The primary test results reported in our Tables result from a foliar application of the test compounds to squash plants which were inoculated with Pseudoperonospora cubensis, the causative organism of downy mildew, 2 to 4 hours after spraying. Formulation consisted of dissolving 48 mg of a selected compound in 1.2 mL of a solvent prepared by mixing 100 mL of "TWEEN 20" (a nonionic surfactant) with 500 mL of acetone and 500 mL of ethanol. The solution of test compound was diluted to 120 mL with deionized water and further diluted to obtain the desired concentration. The rating system from 1 to 9 is shown in Table I. 

In vitro tests comparing 1 and 9 showed that 9 was generally more active. Both compounds were compared with maneb (S) for the control of downy mildew (Pseudoperonospora cubensis of squash. The ED90S were < 25 ppm for both test compounds, each giving superior control to the reference. In other side-by-side... 

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