Rose aphid

aphids. In summer, winged aphids spread the infestation to other rose plants and sometimes also to secondary hosts. Colonies are often present on rose bushes [...] by parthenogenesis, with unfertilized viviparous females continuing to produce new generations of females. Aphids moult four times before reaching adulthood [...] although in mild winter some adults may continue to reproduce parthenogenetically. Large colonies of aphids can build up on roses in spring and summer; sometimes

Neoseiulus californicus

than Phytoseiulus persimilis . It can survive longer than Phytoseiulus persimilis when spider mites are scarce and can control small spider mite populations [...] californicus is a selective predator of Tetranychid mites, i.e. it prefers to feed on spider mites but can also feed and survive on other prey, including other [...] sources. They can also survive longer than Phytoseiulus persimilis in the complete absence of food, remaining in the crop to await the arrival of new prey. Life

Black sigatoka disease

develop into conidiophores with new conidia or grow across the surface and infect adjacent stomata. Both types of spores can germinate within two or three [...] three days under optimal conditions (humidity close to saturation and temperature above 20 °C). How to prevent Black sigatoka disease Use resistant cultivars [...] puddles and ensuring optimal ventilation in the crop Prevent plant diseases by optimizing plant potential and crop resilience.

Soybean

vary greatly in size and the hull can be black or brown, but also blue, yellow or green. When planting soybean plants, there is considerably more protein [...] so-called legume and indigenous to East Asia. It is extensively cultivated for its edible beans. The fruit of the plant is a hairy pod, that grows clustered [...] protein produced per acre than when planting other crops. Major producers of soybeans are Argentina, Brazil and the United States. Soybeans are now an important

Aphidius colemani

aphids to drop from the leaf and fall to the ground. Although many aphids die as a result, many will survive and migrate to other plants to begin new colonies [...] density and should always be adjusted to the particular situation. Start introduction preventively soon after planting of the crop. Introduction rates typically [...] effective searching behaviour, which enables the wasps to track down and parasitize aphids , even when they are at low density. The behaviour of the female

Citrus mealybug

search for a new feeding place and are capable of moving a reasonable distance over the plant. The male nymph attaches itself to the plant, whereas the [...] lived and can be hard to spot. They are smaller than the females, have two pairs of wings and two long tail filaments. Their sole task is to fertilize [...] citri ) can also appear in cucumber, melon and aubergine. Damage symptoms Although most species of mealybug feed on the aerial parts of the plant, some species

Western flower thrips

prefer to feed on developing plant tissues such as growing tips and flower buds. When these tissues develop further, the leaves and flowers can appear [...] Thrips cause damage to plants by piercing the cells of the surface tissues and sucking out their contents, causing the surrounding tissue to die. The resulting [...] the crop. The vigour of the plant is reduced by loss of chlorophyll. When infestations become serious the leaves themselves can shrivel. Western flower thrips

Tomato leaf miner

miners cause damage to plants both directly and indirectly. The most direct damage is caused by the larvae mining the leaf tissue, leading to desiccation, premature [...] (sub-)tropical areas this can lead to burning in fruit such as tomato and melon. Loss of leaves also reduces yield. In full-grown plants of fruiting vegetable [...] Seedlings and young plants can be completely destroyed as a result of the direct damage caused by leaf miners. Indirect damage arises when disease causing

American serpentine leaf miner

miners cause damage to plants both directly and indirectly. The most direct damage is caused by the larvae mining the leaf tissue, leading to desiccation, premature [...] subtropical areas this can lead to burning in fruit such as tomato and melon. Loss of leaves also reduces yield. In full-grown plants of fruiting vegetable [...] hard to distinguish from feeding spots. The larvae of Liriomyza trifolii are entirely ochre-yellow. When the larva hatches from the egg, it begins to eat

Tea

Tea belongs to the genus Camellia and family Camelliaceae. Tea plant is an economically important plantation crop extensively cultivated in the hills of [...] tropical plant grows well in hot and humid climate. The ideal temperature for growth is 20-30 0 C. It requires well distributed rainfall from 150 to 300cm [...] 300cm throughout the year. Tea plantation is shade loving plant and grows vigorously under the shade trees. The original species, which produces tea, were C