Early Detection of the Spinach Downy Mildew Pathogen in Leaves by Recombinase Polymerase Amplification.

Downy mildew of spinach, caused by , is a major economic threat to both organic and conventional spinach production. Symptomatic spinach leaves are unmarketable and spinach with latent infections are problematic because symptoms can develop postharvest. Therefore, early detection methods for could help producers identify infection before visible symptoms appear.

The effect of two QTLs for resistance to in cotton on nematode egression from roots.

Cotton is widely grown in the southern US and is its most significant pathogen. The germplasm line M-120 RNR is highly resistant to due to two resistance QTLs (quantitative trait loci), and . Both QTLs reduce total egg production, but the QTLs affect development at different life stages.

Fusarium wilt of cotton may commonly result from the interaction of f. sp. with .

The interaction between f. sp. (Fov) and (root-knot nematode) resulting in Fusarium wilt (FW) of cotton is well-known.

Resistance Quantitative Trait Loci and in Cotton Have Different Effects on the Development of , the Southern Root-Knot Nematode.

Quantitative trait loci (QTLs) and impart a high level of resistance to in cotton. Breeders had previously backcrossed both QTLs into the susceptible Coker 201 to create the highly resistant M-120 RNR, and we crossed Coker 201 and M-120 RNR to create near-isogenic lines with either or . Previous work suggests different modes of action for and .