Search results
Results from the WOW.Com Content Network
Whiteflies feed by tapping into the phloem of plants, introducing toxic saliva and decreasing the plants' overall turgor pressure. Since whiteflies congregate in large numbers, susceptible plants can be quickly overwhelmed. Further harm is done by mold growth encouraged by the honeydew whiteflies secrete. This may also seriously impede the ...
Whiteflies go through egg, nymph, and adult stages. You likely won’t see their teeny eggs on the undersides of leaves. Once hatched, the nymph stages are about 1/32-inch long and attach to the ...
The silverleaf whitefly (Bemisia tabaci, also informally referred to as the sweet potato whitefly) is one of several species of whitefly that are currently important agricultural pests. [1] A review in 2011 concluded that the silverleaf whitefly is actually a species complex containing at least 40 morphologically indistinguishable species.
Many parasitoid wasps are considered beneficial to humans because they naturally control agricultural pests. Some are applied commercially in biological pest control, starting in the 1920s with Encarsia formosa to control whitefly in greenhouses. Historically, parasitoidism in wasps influenced the thinking of Charles Darwin. [3]
Greenhouse whitefly nymph. Adult. Females are capable of mating less than 24 hours after emergence and most frequently lay their eggs on the undersides of leaves. Eggs are pale yellow in colour, before turning grey prior to hatching. Newly hatched nymphs, often known as crawlers, are the only mobile immature life-stage. During the first and ...
A pest is any living thing which humans consider troublesome to themselves, their possessions, or the environment. [1] Pests can cause issues with crops, human or animal health, buildings, and wild areas or larger landscapes. [2] An older usage of the word "pest" is of a deadly epidemic disease, specifically plague.
Occasionally, some insects, such as scale, spider mites, aphids, or whiteflies may take up residence on the leaves. Check the foliage often for any signs of these unwanted guests. This is ...
B. bassiana is a white mould when grown on culture, producing white spore balls made up of many conidia that are single-celled, haploid, and hydrophobic. [8] [9] The short, ovoid conidiogenous cells that produce the conidia have a narrow apical extension called a rachis, which elongates into a long zig-zag extension.