Standaard Boekhandel gebruikt cookies en gelijkaardige technologieën om de website goed te laten werken en je een betere surfervaring te bezorgen.
Hieronder kan je kiezen welke cookies je wilt inschakelen:
Technische en functionele cookies
Deze cookies zijn essentieel om de website goed te laten functioneren, en laten je toe om bijvoorbeeld in te loggen. Je kan deze cookies niet uitschakelen.
Analytische cookies
Deze cookies verzamelen anonieme informatie over het gebruik van onze website. Op die manier kunnen we de website beter afstemmen op de behoeften van de gebruikers.
Marketingcookies
Deze cookies delen je gedrag op onze website met externe partijen, zodat je op externe platformen relevantere advertenties van Standaard Boekhandel te zien krijgt.
Je kan maximaal 250 producten tegelijk aan je winkelmandje toevoegen. Verwijdere enkele producten uit je winkelmandje, of splits je bestelling op in meerdere bestellingen.
Cotton is a main cash crop of Pakistan as it plays a pivotal role in the economy. Cotton plant has been genetically modified to contain the toxic gene of Bacillus thuringiensis known as Transgenic Bt Cotton and it has been found successful in the management of bollworms; however, it also invites other insect pests especially sucking pests due to reduction in pesticide sprays at early stages. So, the present study was planned to measure the comparative resistance of six Bt cotton cultivars against major sucking insect pests (whitefly, jassid and thrips). The results of experiment showed that the transgenic cotton cultivar Bt-802 found comparatively resistant by having maximum impact on whitefly and jassid abundance which contained 7.97, 1.83 per leaf population respectively. Transgenic cotton cultivar Bt-806 had maximum impact on thrips population by holding lowest population (5.80 per leaf thrips). The sucking insect population had negative correlation with relative humidity and rainfall while temperature had positive correlation. In case on psysico-morphic plant character gossypol glands and hair leaf density had significant impact on sucking insect pest population.