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Thirty accessions of cotton (Gossypium) in the INIFAP genebank in the Iguala Experimental Field were analyzed for resistance to eriophyid mites. Vegetative structures such as leaves and petioles and reproductive structures such as the bract calyx with galls were collected from cotton plants. Galls were cut into cross section to locate mites; taxonomic keys were used to identify the mites. Damage to accessions of cotton was evaluated on a scale of six classes. Damage by eriophyid mites was analyzed with PROC RANK, subjecting it to analysis of variance with PROC GLM, and mean comparison by Tukey (P = 0.05) using statistical software SAS® 9.2. Eriophyidae was reported associated with formation of galls in cotton. Severity of damage was 0 to 85%, but cotton accessions TOA-06, FZ-06, GOS-16, GOS-34, TOA-09, TOA-02, GOS-17, TOA-04, and TOA-05 were resistant. More studies of biology and ecology and molecular analysis are needed to better understand and develop management strategies against mites in cotton. [ABSTRACT FROM AUTHOR]

The guacimo (Guazuma ulmifolia Lam.) is a tree used for several purposes in agroforestry. However, phytophagous mites have great impact on guacimo, creating leaf galls. The objective of this study was to taxonomically identify mites found in galls of G. ulmifolia at the Tepalcingo community, Morelos, Mexico. Random samples of malformed leaves and galls were collected during field trips, and taxonomic keys were used to identify the mites. Subsequently, the galls were dissected, and identity of the samples was determined with the aid of a stereoscope. The phytophagous mites belonged to the Eriophyidae family and are an invasive pest of guacimo trees. Future studies should focus on finding effective biological control agents and using molecular techniques for more accurate identification. [ABSTRACT FROM AUTHOR]