The boll weevil causes serious damage to the cotton crop in South America. Several studies have been published on this pest, but its phenology and behavior under the tropical conditions prevailing in Brazil are not well-known. In this study the feeding behavior and main food sources of adult boll weevils throughout the year in Central Brazil was investigated. The digestive tract contents of ins...

BACKGROUND Stink bugs (Hemiptera: Pentatomidae) comprise a critically important insect pest complex affecting 12 major crops worldwide including cotton. In the US, stink bug damage to developing cotton bolls causes boll abscission, lint staining, reduced fiber quality, and reduced yields with estimated losses ranging from 10 to 60 million dollars annually. Unfortunately, scouting for stink bug ...

Abstract A field study was carried out to determine the influence of foliage applied plant growth promoter and retardant in improving soil sulphur fertilizer use efficiency cotton during two consecutive summers 2014 2015. Experimental trial comprised three different sources (ammonium sulphate, potassium sulphate elemental sulphur) foliar spray including tap water taken as control. Among treatme...

This study was to estimate the GCA of the parents and SCA considered for the development of high yielding and better quality cultivars. Eleven genotypes and 28 F1 hybrids obtained by crossing 4 lines and 7 testers in line X tester mating system were sown in randomized complete block design. L X T analysis revealed significant GCA and SCA effects for all the traits except earliness. Among the pa...

cotton is of particular importance  in fiber crops. variation in the cultivars and the potential of different cultivars is an important step in increasing production per unit area. in this study, nine new varieties of cotton including cotton hybrids successful and successful genotypes in a randomized complete block design with four replications,  with varamin camecial cultivar were evaluated in...

Genetic variability for seed cotton yield and itscomponents were studied in three segregating F2 populations of (Gossypium hirsutumL.). Significant variation was recorded major traits all the populations. Traits such as plant height (20 cm to 143 cm), bolls per (1 30), boll weight (2.0 g 6.8 g) (1.8 115 exhibited wide range.High PCV GCV estimates under study except days 50 cent flowering openin...

An unexpected outbreak of boll weevils, Anthonomus grandis, an insect pest of cotton, across the Southern Rolling Plains (SRP) eradication zone of west-central Texas, USA, was detected soon after passage of Tropical Storm Erin through the Winter Garden district to the south on 16 August 2007. The synchrony and broad geographic distribution of the captured weevils suggest that long-distance disp...