Le Rü, B.P., & Iziquel, Y. 1990 [An experimental study, with the aid of a rain simulator, of the mechanical effect of rainfall on populations of the cassava mealybug, Phenacoccus manihoti.].. Acta Ecologica / Ecologia Applicata 11(5): 741-754.

Notes: Original title: Etude experimentale, a l'aide d'un simulateur de pluies, de l'effect mecanique de la chute des pluies sur les populations de la cochenille du manioc, Phenacoccus manihoti. Abstract: Intensity of rain seems to be the most effective factor of mealybug elimination (about 22%); duration of rainfall has a lesser effect (less than 10%); those mealybugs which show symptoms of mycosis are twice as sensitive to mechanical action of rain than healthy ones.