This paper is developed based on machine vision system and data mining techniques to identify the cotton leaf spot diseases. The leaves are most probably affected by the fungi, viral and bacterial diseases in the leaf spot areas which plays a vital role of crop situation. This paper clarifies six types of diseases in the cotton plant. The significance of this research work design is based on ad...

Leaf samples from 13 diseased and four healthy hibiscus plants were collected. Total DNA was isolated and subjected to PCR using degenerate begomovirus primers (CP-F: 5′-GCATCTGCAGGCCCACATYGTCTTYCCNGT-3′ and CP-R: 5′-AATACTGCAGGGCTTYCTRTACATRGG-3′). All samples of symptomatic leaves yielded a ~1.2 kb PCR product indicative of a begomovirus. Full-length genomes were amplified by the rolling circ...

We investigated the role of ethylene in the response of cotton to high temperature using cotton genotypes with genetically interrupted ethylene metabolism. In the first experiment, Sicot 71BRF and 5B (a lintless variant with compromised ethylene metabolism) were exposed to 45°C, either by instantaneous heat shock or by ramping temperatures by 3°C daily for 1 week. One day prior to the start of ...

Advanced lines of Pima cotton {Gossypium barbadense L.) bred for higher yield potential and heat resistance have higher stomatal conductance and smaller leaf areas than those of obsolete !ines. In controlled experiments, five commercial lines of Pima cotton having increasing lint yield and heat resistance showed a gradient of increasing stomatal conductance and decreasing leaf size. In field ex...

Leaf senescence varies greatly among cotton cultivars, possibly due to their root characteristics, particularly the root-sourced cytokinins and abscisic acid (ABA). Early-senescence (K1) and late-senescence (K2) lines, were reciprocally or self-grafted to examine the effects of rootstock on leaf senescence and endogenous hormones in both leaves and xylem sap. The results indicate that the graft...

The importance of mutualism is receiving more attention in community ecology. In this study, the fire ant Solenopsis invicta was found to take advantage of the shelters constructed by the leaf roller Sylepta derogata to protect mealybugs (Phenacoccus solenopsis) against their natural enemies. This protective effect of fire ant tending on the survival of mealybugs in shelters was observed when e...

in determining how a plant responds to moisture deficit stress. Moisture deficits can depress cotton (Gossypium hirsutum L.) lint Although there has been considerable research docuyield in all cotton production regions. However, most cotton physiomenting the growth and physiological response of cotton logical drought stress research has been conducted in arid production to moisture deficit stre...

Cotton leaf, bract, fibre from opened bolls, and soil samples were collected weekly during two growing seasons (1984, 1985). Total and Gram negative bacterial populations were determined for each sample. Representative bacterial isolates were identified and endotoxin concentrations determined. For both years total and Gram negative bacterial populations on all sample types remained relatively s...