Evaluation of resistance in cotton genotypes against leafhoppers Amrasca biguttula biguttula (Ishida), (Homoptera: Cicadellidae)

Evaluation of cotton varieties resistant to Amrasca biguttula (Hemiptera: Ciccadelidae) in the Indonesian agroecosystem to mitigate climate change impacts

“…This observation aligns with the growing concerns related to climate change, as shifts in temperature and weather patterns can influence the population dynamics of insect pests. As one of the impacts of climate change, temperature changes significantly influence the vegetative and generative growth of cotton plants, subsequently affecting cotton seed yield [14]. Furthermore, as temperatures rise and weather patterns become less predictable, pests' lifecycle and reproductive rates like A. biguttula can be affected.…”

“…The measurement of leaf pubescence parameters in cotton leaves has been used as a morphological resistance trait against leafhoppers [7]. This trait has been employed as a selection criterion for resistance in cotton lines against African leafhoppers [8] and specifically against A. biguttula in Asia [9,10]. Cotton genotypes with a high density of trichomes exhibit strong resistance to leafhopper infestations.…”

Evaluation of Cotton (Gossypium hirsutum L.) Varieties/Genotypes for Jassid, Amrasca biguttula biguttula (Ishida) Resistance under Rainfed Conditions

“…Bunny Bt (16.9/3 leaves/plant), Bunny non-Bt (19.3/3 leaves/plant) and susceptible check DCH-32 (24.0/3 leaves/plant)". Manivannan et al [5] screened 54 cotton genotypes along resistant check (NDLH 1938) [22] evaluated eight Bt cotton hybrids against A. biguttula biguttula (Ishida) under unprotected conditions and recorded the lowest population of jassids in hybrid NCS-2778 (3.76 jassids per 3 leaves), followed by RCH-659 (5.41 jassids per 3 leaves), Pradeep (6.27 jassids per 3 leaves), Moksha (6.43 jassids per 3 leaves). The highest population of jassids were recorded in Jadhu (9.91 jassids per 3 leaves) and Money Maker (7.70 jassids per 3 leaves).…”

“…Adults and nymphs of leafhopper penetrate their stylets either continuously or intermittently, they secret saliva inside the leaf tissues, this saliva after solidification forms a sheath like structure called salivary sheath; it protects the stylet from external damage while feeding. Once the stylet enters into the phloem sap, it sucks the sap and causes injury to the tissues, which results in turning of the tissues into yellow, after wards, the leaf starts to curling downward and finally withered and detached" [5].…”

Sequencing and analysis of the complete mitochondrial genome of Amrasca biguttula biguttula Ishida, 1913 (Hemiptera: Cicadellidae: Typhlocybinae: Empoascini)

“… 2016 ; Manivannan et al. 2021 ). Leafhoppers, both adults and nymphs, infest the surface of the leaves and suck the sap from the phloem, leading to scorching of the leaf margin, which is followed by downward curling of the leaf margins and reddening.…”